Measurement is one of the key concepts which discriminates classical and quantum physics. Unlike classical systems, a measurement on a quantum system typically alters it drastically as a result of wave function collapse. Here we suggest that this feature can be exploited for inducing quench dynamics...

[Phys. Rev. Lett. 121, 030601] Published Mon Jul 16, 2018

]]>We show that apparently thermalized states still store relevant amounts of information about their past, information that can be tracked by experiments involving nonequilibrium processes. We provide a condition for the microcanonical quantum Crook’s theorem, and we test it by means of numerical expe...

[Phys. Rev. Lett. 121, 030602] Published Mon Jul 16, 2018

]]>We compute the joint statistics of the momenta ${p}_{i}$ of $N$ noninteracting fermions in a trap, near the Fermi edge, with a particular focus on the largest one ${p}_{\mathrm{max}}$. For a 1D harmonic trap, momenta and positions play a symmetric role, and hence the joint statistics of momenta are identical to that of the ...

[Phys. Rev. Lett. 121, 030603] Published Mon Jul 16, 2018

]]>Quantum backaction (QBA) of a measurement limits the precision of observation of the motion of a free mass. This profound effect, dubbed the “Heisenberg microscope” in the early days of quantum mechanics, leads to the standard quantum limit (SQL) stemming from the balance between the measurement sen...

[Phys. Rev. Lett. 121, 031101] Published Mon Jul 16, 2018

]]>In this work we introduce boundary time crystals. Here *continuous* time-translation symmetry breaking occurs only in a macroscopic fraction of a many-body quantum system. After introducing their definition and properties, we analyze in detail a solvable model where an accurate scaling analysis can be...

[Phys. Rev. Lett. 121, 035301] Published Mon Jul 16, 2018

]]>The slow Debye-like relaxation in the dielectric spectra of monohydroxy alcohols is a matter of long-standing debate. In the present Letter, we probe reorientational dynamics of 5-methyl-2-hexanol with dielectric spectroscopy and depolarized dynamic light scattering (DDLS) in the supercooled regime....

[Phys. Rev. Lett. 121, 035501] Published Mon Jul 16, 2018

]]>We study transient dynamics in a two-dimensional system of interacting Dirac fermions subject to a quenched drive with circularly polarized light. In the absence of interactions, the drive opens a gap at the Dirac point in the quasienergy spectrum, inducing nontrivial band topology. We investigate t...

[Phys. Rev. Lett. 121, 036801] Published Mon Jul 16, 2018

]]>Strain in a semiconductor quantum well spatially modulates the electron population, leading to a valley superlattice.

[Phys. Rev. Lett. 121, 036802] Published Mon Jul 16, 2018

]]>Inducing superconductivity in a topological insulator can lead to novel quantum effects. However, experimental approaches to turn a topological insulator into a superconductor are limited. Here, we report on superconductivity in topological insulator ${\mathrm{Bi}}_{0.91}{\mathrm{Sb}}_{0.09}$ induced via focused ion-beam deposit...

[Phys. Rev. Lett. 121, 037001] Published Mon Jul 16, 2018

]]>Thermally injected pure spin current phenomena have been investigated in $\mathrm{Bi}/{\mathrm{Y}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$ and $\mathrm{Bi}/\mathrm{Ag}/{\mathrm{Y}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$ structures at room temperature. We show that although pure spin current has been injected into the Bi layer and the $\mathrm{Bi}/\mathrm{Ag}$ bilayer, there is little detectable signal of spin-to-charge conversion, e...

[Phys. Rev. Lett. 121, 037201] Published Mon Jul 16, 2018

]]>Spin-torque-biased magnetic dynamics in an easy-plane ferromagnet (EPF) is theoretically studied in the presence of a weak in-plane anisotropy. While this anisotropy spoils U(1) symmetry, thereby quenching the conventional spin superfluidity, we show that the system instead realizes a close analog o...

[Phys. Rev. Lett. 121, 037202] Published Mon Jul 16, 2018

]]>A primary limitation of the intensively researched polaritonic systems compared to their atomic counterparts for the study of strongly correlated phenomena and many-body physics is their relatively weak two-particle interactions compared to disorder. Here, we show how new opportunities to enhance su...

[Phys. Rev. Lett. 121, 037401] Published Mon Jul 16, 2018

]]>In a Weyl superconductor, Landau levels and a vortex lattice may coexist.

[Phys. Rev. Lett. 121, 037701] Published Mon Jul 16, 2018

]]>Using coarse-grained molecular dynamics simulations and an umbrella sampling method that uses local surfactant density as a reaction coordinate, we directly calculate, for the first time, both the scission and branching free energies of a model charged micelle [cationic cetyltrimethylammonium chlori...

[Phys. Rev. Lett. 121, 038001] Published Mon Jul 16, 2018

]]>The osmolyte compound TMAO keeps proteins from clumping and unfolding at high pressures, allowing creatures to live in a deep-sea environment.

[Phys. Rev. Lett. 121, 038101] Published Mon Jul 16, 2018

]]>Parton quasidistribution functions provide a path toward an *ab initio* calculation of parton distribution functions (PDFs) using lattice QCD. One of the problems faced in calculations of quasi-PDFs is the renormalization of a nonlocal operator. By introducing an auxiliary field, we can replace the no...

[Phys. Rev. Lett. 121, 022004] Published Fri Jul 13, 2018

]]>We introduce a new application of solid state NMR measurements towards characterizing the donor-acceptor interfaces within bulk heterojunction (BHJ) films. Rotational echo double resonance (REDOR) is used to measure dipolar couplings between ${}^{13}\mathrm{C}$ nuclei on the acceptor phenyl-${\mathrm{C}}_{61}$-butyric acid methyl ...

[Phys. Rev. Lett. 121, 026101] Published Fri Jul 13, 2018

]]>We develop an analytic theory for the recently demonstrated Josephson junction laser [M. C. Cassidy *et al.*, Science **355**, 939 (2017)]. By working in the time-domain representation (rather than the frequency domain), a single nonlinear equation is obtained for the dynamics of the device, which is ful...

[Phys. Rev. Lett. 121, 027004] Published Fri Jul 13, 2018

]]>We present a theoretical investigation of the properties of quantum correlation functions in a multimode system. We define a total $m$th order equal-time correlation function, summed over all modes, which is shown to be conserved if the Hamiltonian possesses U(1) symmetry. It is also conserved in the ...

[Phys. Rev. Lett. 121, 020404] Published Thu Jul 12, 2018

]]>It has been observed empirically that two-dimensional vortices tend to cluster, forming a giant vortex. To account for this observation, Onsager introduced the concept of negative absolute temperature in equilibrium statistical mechanics. In this Letter, we show that in the thermodynamic limit a sys...

[Phys. Rev. Lett. 121, 020602] Published Thu Jul 12, 2018

]]>Among gravitational-wave sources, the merger of a neutron star and a black hole may provide the most precise way to measure how fast the Universe is expanding.

[Phys. Rev. Lett. 121, 021303] Published Thu Jul 12, 2018

]]>A search for signals of nuclear recoils from dark matter, mediated by a light particle, places the first direct-detection constraints on self-interacting dark matter.

[Phys. Rev. Lett. 121, 021304] Published Thu Jul 12, 2018

]]>We measured a considerable increase of the emitted radiation by $120\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{GeV}/c$ electrons in an axially oriented lead tungstate scintillator crystal, if compared to the case in which the sample was not aligned with the beam direction. This enhancement resulted from the interaction of particles with the s...

[Phys. Rev. Lett. 121, 021603] Published Thu Jul 12, 2018

]]>We present a nontrivial correlation between the enhancement of the Higgs-fermion couplings and the Higgs pair production cross section in two Higgs doublet models with a flavor symmetry, with implications for LHC searches. This symmetry suppresses flavor-changing neutral couplings of the Higgs boson...

[Phys. Rev. Lett. 121, 021801] Published Thu Jul 12, 2018

]]>Lattice gauge theory simulations suggest that the disagreement between theoretical and experimental values for the anomalous magnetic moment of the muon might be less than previously thought.

[Phys. Rev. Lett. 121, 022002] Published Thu Jul 12, 2018

]]>Lattice gauge theory simulations suggest that the disagreement between theoretical and experimental values for the anomalous magnetic moment of the muon might be less than previously thought.

[Phys. Rev. Lett. 121, 022003] Published Thu Jul 12, 2018

]]>The discrimination of two nonorthogonal states is a fundamental element for secure and efficient communication. Quantum measurements of nonorthogonal coherent states can enhance information transfer beyond the limits of conventional technologies. We demonstrate a strategy for binary state discrimina...

[Phys. Rev. Lett. 121, 023603] Published Thu Jul 12, 2018

]]>Real-time spectroscopy access to ultrafast fiber lasers opens new opportunities for exploring complex soliton interaction dynamics. Here, we have reported the first observation, to the best of our knowledge, of the entire buildup process of soliton molecules (SMs) in a mode-locked laser. We have obs...

[Phys. Rev. Lett. 121, 023905] Published Thu Jul 12, 2018

]]>The polar phase of ${}^{3}\mathrm{He}$, which is topological spin-triplet superfluid with the Dirac nodal line in the spectrum of Bogoliubov quasiparticles, has been recently stabilized in a nanoconfined geometry. We pump magnetic excitations (magnons) into the sample of polar phase and observe how they form a Bose...

[Phys. Rev. Lett. 121, 025303] Published Thu Jul 12, 2018

]]>Phase field modeling offers an extremely general framework to predict microstructural evolutions in complex systems. However, its computational implementation requires a discretization scheme with a grid spacing small enough to preserve the continuous character of the theory. We present here a new f...

[Phys. Rev. Lett. 121, 025501] Published Thu Jul 12, 2018

]]>We performed high-pressure x-ray diffraction (XRD), Raman, and transport measurements combined with first-principles calculations to investigate the behavior of tin diselenide (${\mathrm{SnSe}}_{2}$) under compression. The obtained single-crystal XRD data indicate the formation of a $(1/3,1/3,0)$-type superlattice ab...

[Phys. Rev. Lett. 121, 027003] Published Thu Jul 12, 2018

]]>Quantum metrology fundamentally relies upon the efficient management of quantum uncertainties. We show that under equilibrium conditions the management of quantum noise becomes extremely flexible around the quantum critical point of a quantum many-body system: this is due to the critical divergence ...

[Phys. Rev. Lett. 121, 020402] Published Wed Jul 11, 2018

]]>We use numerically unbiased methods to show that the one-dimensional Hubbard model with periodically distributed on-site interactions already contains the minimal ingredients to display the phenomenon of magnetoresistance; i.e., by applying an external magnetic field, a dramatic enhancement on the c...

[Phys. Rev. Lett. 121, 020403] Published Wed Jul 11, 2018

]]>The Kardar-Parisi-Zhang (KPZ) equation defines the main universality class for nonlinear growth and roughening of surfaces. But under certain conditions, a conserved KPZ equation (CKPZ) is thought to set the universality class instead. This has non-mean-field behavior only in spatial dimension $d<\mathrm{...}$

[Phys. Rev. Lett. 121, 020601] Published Wed Jul 11, 2018

]]>We propose the existence of an infinite-parameter family of solutions in anti–de Sitter (AdS) that oscillate on any number of noncommensurate frequencies. Some of these solutions appear stable when perturbed, and we suggest that they can be used to map out the AdS “islands of stability.” By numerica...

[Phys. Rev. Lett. 121, 021103] Published Wed Jul 11, 2018

]]>Observed mixing between two light scalar mesons may help constrain their internal structure.

[Phys. Rev. Lett. 121, 022001] Published Wed Jul 11, 2018

]]>Under the approximate chiral symmetry restoration, quark interactions with topological gluon fields in quantum chromodynamics can induce a chirality imbalance and parity violation in local domains. An electric charge separation (CS) could be generated along the direction of a strong magnetic field ($\mathbf{...}$

[Phys. Rev. Lett. 121, 022301] Published Wed Jul 11, 2018

]]>Eight newly discovered neutron-rich nuclei act as key discriminators between different mass models.

[Phys. Rev. Lett. 121, 022501] Published Wed Jul 11, 2018

]]>We report on the first ${Q}^{2}$-dependent measurement of the beam-normal single spin asymmetry ${A}_{n}$ in the elastic scattering of 570 MeV vertically polarized electrons off ${}^{12}\mathrm{C}$. We cover the ${Q}^{2}$ range between 0.02 and $0.05\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{GeV}}^{2}/{c}^{2}$ and determine ${A}_{n}$ at four different ${Q}^{2}$ values. The experimental results are com...

[Phys. Rev. Lett. 121, 022503] Published Wed Jul 11, 2018

]]>Final-state kinematic imbalances are measured in mesonless production of ${\nu}_{\mu}+A\to {\mu}^{-}+p+X$ in the MINERvA tracker. Initial- and final-state nuclear effects are probed using the direction of the ${\mu}^{-}\text{\u2212}p$ transverse momentum imbalance and the initial-state momentum of the struck neutron. Differential cross sect...

[Phys. Rev. Lett. 121, 022504] Published Wed Jul 11, 2018

]]>Fornal and Grinstein recently proposed that the discrepancy between two different methods of neutron lifetime measurements, the beam and bottle methods, can be explained by a previously unobserved dark matter decay mode, $n\to X+\gamma $. We perform a search for this decay mode over the allowed range of energi...

[Phys. Rev. Lett. 121, 022505] Published Wed Jul 11, 2018

]]>We perform the first direct mass measurements of neutron-rich calcium isotopes beyond neutron number 34 at the RIKEN Radioactive Isotope Beam Factory by using the time-of-flight magnetic-rigidity technique. The atomic mass excesses of ${}^{55\u201357}\mathrm{Ca}$ are determined for the first time to be $-18650(160)$, $-\mathrm{135...}$

[Phys. Rev. Lett. 121, 022506] Published Wed Jul 11, 2018

]]>A new nuclear-spin comagnetometer made from two ensembles of atomic spins can improve constraints on spin-gravity coupling of nucleons by several orders of magnitude.

[Phys. Rev. Lett. 121, 023202] Published Wed Jul 11, 2018

]]>We characterize attosecond transient absorption spectroscopy (ATAS) in molecules with coupled nuclear and electronic dynamics in the vicinity of a conical intersection between adiabatic potential energy surfaces. With respect to ATAS, the nonadiabatic vibronic coupling strength can be divided into w...

[Phys. Rev. Lett. 121, 023203] Published Wed Jul 11, 2018

]]>The ability to coherently control mechanical systems with optical fields has made great strides over the past decade, and now includes the use of photon counting techniques to detect the nonclassical nature of mechanical states. These techniques may soon be used to perform an optomechanical Bell tes...

[Phys. Rev. Lett. 121, 023602] Published Wed Jul 11, 2018

]]>We demonstrate the existence of a shuttling effect for the radiative heat flux exchanged between two bodies separated by a vacuum gap when the chemical potential of photons or the temperature difference is modulated. We show that this modulation typically gives rise to a supplementary flux which sup...

[Phys. Rev. Lett. 121, 023903] Published Wed Jul 11, 2018

]]>Point source localization is a problem of persistent interest in optical imaging. In particular, a number of widely used biological microscopy techniques rely on precise three-dimensional localization of single fluorophores. As emitter depth localization is more challenging than lateral localization...

[Phys. Rev. Lett. 121, 023904] Published Wed Jul 11, 2018

]]>Applying a current across a drop of liquid gallium induces an oscillatory motion reminiscent to that of a beating heart.

[Phys. Rev. Lett. 121, 024302] Published Wed Jul 11, 2018

]]>Newtonian pipe flow is known to be linearly stable at all Reynolds numbers. We report, for the first time, a linear instability of pressure-driven pipe flow of a viscoelastic fluid, obeying the Oldroyd-B constitutive equation commonly used to model dilute polymer solutions. The instability is shown ...

[Phys. Rev. Lett. 121, 024502] Published Wed Jul 11, 2018

]]>We investigate the propagation of spin waves in two-component mixtures of one-dimensional Bose gases interacting through repulsive contact potentials. By using quantum Monte Carlo methods we calculate static ground-state properties, such as the spin susceptibility and the spin structure factor, as a...

[Phys. Rev. Lett. 121, 025302] Published Wed Jul 11, 2018

]]>In organic photovoltaic systems, a photogenerated molecular exciton in the donor domain dissociates into a hole and an electron at the donor-acceptor heterojunction, and subsequently separates into free charge carriers that can be extracted as photocurrents. The recombination of the once-separated e...

[Phys. Rev. Lett. 121, 026001] Published Wed Jul 11, 2018

]]>Motivated by recent experiments on Kondo insulators, we theoretically study quantum oscillations from disorder-induced in-gap states in small-gap insulators. By solving a non-Hermitian Landau level problem that incorporates the imaginary part of electron’s self-energy, we show that the oscillation p...

[Phys. Rev. Lett. 121, 026403] Published Wed Jul 11, 2018

]]>A versatile and efficient variational approach is developed to solve in- and out-of-equilibrium problems of generic quantum spin-impurity systems. Employing the discrete symmetry hidden in spin-impurity models, we present a new canonical transformation that completely decouples the impurity and bath...

[Phys. Rev. Lett. 121, 026805] Published Wed Jul 11, 2018

]]>We report the experimental observation of commensurability oscillations (COs) in 1D graphene superlattices. The widely tunable periodic potential modulation in hBN-encapsulated graphene is generated via the interplay of nanopatterned few-layer graphene acting as a local bottom gate and a global Si b...

[Phys. Rev. Lett. 121, 026806] Published Wed Jul 11, 2018

]]>Topological insulators are promising candidates for optically driven spintronic devices, because photoexcitation of spin polarized surface states is governed by angular momentum selection rules. We carry out femtosecond midinfrared spectroscopy on thin films of the topological insulator ${\mathrm{Bi}}_{2}{\mathrm{Te}}_{2}\mathrm{Se}$, wh...

[Phys. Rev. Lett. 121, 026807] Published Wed Jul 11, 2018

]]>Bulk/boundary correspondence is shown to exist in non-Hermitian models through the use of biorthogonal quantum mechanics.

[Phys. Rev. Lett. 121, 026808] Published Wed Jul 11, 2018

]]>We propose a mechanism whereby disorder can enhance the transition temperature ${T}_{c}$ of an unconventional superconductor with pairing driven by exchange of spin fluctuations. The theory is based on a self-consistent real space treatment of pairing in the disordered one-band Hubbard model. It has been d...

[Phys. Rev. Lett. 121, 027002] Published Wed Jul 11, 2018

]]>We theoretically investigate pumping of phonons by the dynamics of a magnetic film into a nonmagnetic contact. The enhanced damping due to the loss of energy and angular momentum shows interference patterns as a function of the resonance frequency and magnetic film thickness that cannot be described...

[Phys. Rev. Lett. 121, 027202] Published Wed Jul 11, 2018

]]>Quantum shot noise probes the dynamics of charge transfers through a quantum conductor, reflecting whether quasiparticles flow across the conductor in a steady stream, or in syncopated bursts. We have performed high-sensitivity shot noise measurements in a quantum dot obtained in a silicon metal-oxi...

[Phys. Rev. Lett. 121, 027701] Published Wed Jul 11, 2018

]]>We report the measurement of the third moment of current fluctuations in a short metallic wire at low temperature. The data are deduced from the statistics of voltage fluctuations across the conductor using a careful determination of environmental contributions. Our results at low bias agree very we...

[Phys. Rev. Lett. 121, 027702] Published Wed Jul 11, 2018

]]>[Phys. Rev. Lett. 121, 029901] Published Wed Jul 11, 2018

]]>Simulations provide a detailed picture of the emission of dust grains in our Galaxy, which is known to interfere with measurements of the cosmic microwave background.

[Phys. Rev. Lett. 121, 021104] Published Tue Jul 10, 2018

]]>We show how a characteristic length scale imprinted in the galaxy two-point correlation function, dubbed the “linear point,” can serve as a comoving cosmological standard ruler. In contrast to the baryon acoustic oscillation peak location, this scale is constant in redshift and is unaffected by nonl...

[Phys. Rev. Lett. 121, 021302] Published Tue Jul 10, 2018

]]>We consider finite superamplitudes of $\mathcal{N}=1$ matter, and use superconformal symmetry to derive powerful first-order differential equations for them. Because of on-shell collinear singularities, the Ward identities have an anomaly, which is obtained from lower-loop information. We show that in the five-...

[Phys. Rev. Lett. 121, 021602] Published Tue Jul 10, 2018

]]>Lifetimes of the first excited ${2}^{+}$ and ${4}^{+}$ states in the extremely neutron-deficient nuclide ${}^{172}\mathrm{Pt}$ have been measured for the first time using the recoil-distance Doppler shift and recoil-decay tagging techniques. An unusually low value of the ratio $B(E2:{4}_{1}^{+}\to {2}_{1}^{+})/B(E2:{2}_{1}^{+}\to {0}_{\mathrm{gs}}^{+})=0.55(19)$ was found, sim...

[Phys. Rev. Lett. 121, 022502] Published Tue Jul 10, 2018

]]>We optically trap freestanding single metallic chiral nanoparticles using a standing-wave optical tweezer. We also incorporate within the trap a polarimetric setup that allows us to perform *in situ* chiral recognition of single enantiomers. This is done by measuring the ${S}_{3}$ component of the Stokes vec...

[Phys. Rev. Lett. 121, 023902] Published Tue Jul 10, 2018

]]>We find that the effects of a localized perturbation in a chaotic classical many-body system—the classical Heisenberg chain at infinite temperature–spread ballistically with a finite speed even when the local spin dynamics is diffusive. We study two complementary aspects of this butterfly effect: th...

[Phys. Rev. Lett. 121, 024101] Published Tue Jul 10, 2018

]]>Topological characteristics of energy bands, such as Dirac and Weyl nodes, have attracted substantial interest in condensed matter systems as well as in classical wave systems. Among these energy bands, the type-II Dirac point is a nodal degeneracy with tilted conical dispersion, leading to a peculi...

[Phys. Rev. Lett. 121, 024301] Published Tue Jul 10, 2018

]]>The acceleration of beam ions during edge localized modes (ELMs) in a tokamak is observed for the first time through direct measurements of fast-ion losses in low collisionality plasmas. The accelerated beam-ion population exhibits well-localized velocity-space structures which are revealed by means...

[Phys. Rev. Lett. 121, 025002] Published Tue Jul 10, 2018

]]>We study the structural, electronic, and vibrational properties of single-layer $1T\text{\u2212}{\mathrm{NbSe}}_{2}$ from first principles. Within the generalized gradient approximation, the $1T$ polytype is highly unstable with respect to the $2H$. The density functional theory with the Hubbard $U$ method improves the stability of ...

[Phys. Rev. Lett. 121, 026401] Published Tue Jul 10, 2018

]]>Flexible long period moiré superlattices form in two-dimensional van der Waals crystals containing layers that differ slightly in lattice constant or orientation. In this Letter we show theoretically that isolated flat moiré bands described by generalized triangular lattice Hubbard models are presen...

[Phys. Rev. Lett. 121, 026402] Published Tue Jul 10, 2018

]]>We study sound in a single-channel one-dimensional quantum liquid. In contrast to classical fluids, instead of a single sound mode we find two modes of density oscillations. The speeds at which these two sound modes propagate are nearly equal, with the difference that scales linearly with the small ...

[Phys. Rev. Lett. 121, 026803] Published Tue Jul 10, 2018

]]>We derive a connection between the intrinsic tribological properties and the electronic properties of a solid interface. In particular, we show that the adhesion and frictional forces are dictated by the electronic charge redistribution occurring due to the relative displacements of the two surfaces...

[Phys. Rev. Lett. 121, 026804] Published Tue Jul 10, 2018

]]>We use spin-polarized scanning tunneling microscopy to demonstrate that Ho atoms on magnesium oxide exhibit a coercive field of more than 8 T and magnetic bistability for many minutes, both at 35 K. The first spontaneous magnetization reversal events are recorded at 45 K, for which the metastable st...

[Phys. Rev. Lett. 121, 027201] Published Tue Jul 10, 2018

]]>Systems of independent active particles embedded into a fluctuating environment are relevant to many areas of soft-matter science. We use a minimal model of noninteracting spin-carrying Brownian particles in a Gaussian field and show that activity-driven spin dynamics leads to patterned order. We fi...

[Phys. Rev. Lett. 121, 028001] Published Tue Jul 10, 2018

]]>We study the role of the quantum geometric tensor (QGT) in the evolution of two-band quantum systems. We show that all its components play an important role on the extra phase acquired by a spinor and on the trajectory of an accelerated wave packet in any realistic finite-duration experiment. While ...

[Phys. Rev. Lett. 121, 020401] Published Mon Jul 09, 2018

]]>Our proper acceleration with respect to the cosmic microwave background results in a real-time change of the angular position of distant extragalactic sources. The cosmological component of this aberration drift signal, the noninertial motion generated by the large-scale distribution of matter, can,...

[Phys. Rev. Lett. 121, 021101] Published Mon Jul 09, 2018

]]>The diffusive paradigm for the transport of Galactic cosmic rays is central to our understanding of the origin of these high energy particles. However, it is worth recalling that the normalization, energy dependence, and spatial extent of the diffusion coefficient in the interstellar medium are fitt...

[Phys. Rev. Lett. 121, 021102] Published Mon Jul 09, 2018

]]>We propose a mechanism for the generation of a magnetic field in the early Universe during the QCD crossover assuming that dark matter is made of axions. Thermoelectric fields arise at pressure gradients in the primordial plasma due to the difference in charge, energy density, and equation of state ...

[Phys. Rev. Lett. 121, 021301] Published Mon Jul 09, 2018

]]>In supersymmetric (SUSY) field theory, there exist configurations that formally satisfy SUSY conditions but are not on the original path integral contour. We refer to such configurations as complexified supersymmetric solutions (CSS). In this Letter we discuss that CSS provide important information ...

[Phys. Rev. Lett. 121, 021601] Published Mon Jul 09, 2018

]]>High harmonics from laser-ablated plumes are mostly generated from ionic species. We demonstrate that with ultrashort infrared ($\sim 1.82\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mu \mathrm{m}$) driving lasers, high harmonics from laser-ablated manganese are predominantly generated from neutral atoms, a transition metal atom with an ionization potential ...

[Phys. Rev. Lett. 121, 023201] Published Mon Jul 09, 2018

]]>We study the impact of three-body physics in quenched unitary Bose gases, focusing on the role of the Efimov effect. Using a local density model, we solve the three-body problem and determine three-body decay rates at unitarity, finding density-dependent, log-periodic Efimov oscillations, violating ...

[Phys. Rev. Lett. 121, 023401] Published Mon Jul 09, 2018

]]>Statistical mechanics underlies our understanding of macroscopic quantum systems. It is based on the assumption that out-of-equilibrium systems rapidly approach their equilibrium states, forgetting any information about their microscopic initial conditions. This fundamental paradigm is challenged by...

[Phys. Rev. Lett. 121, 023601] Published Mon Jul 09, 2018

]]>We present a reconfigurable topological photonic system consisting of a 2D lattice of coupled ring resonators, with two sublattices of site rings coupled by link rings, which can be accurately described by a tight-binding model. Unlike previous coupled-ring topological models, the design is translat...

[Phys. Rev. Lett. 121, 023901] Published Mon Jul 09, 2018

]]>A reactive interface in the form of an autocatalytic reaction front propagating in a bulk phase can generate a dynamic contact line upon reaching the free surface when a surface tension gradient builds up due to the change in chemical composition. Experiments in microgravity evidence the existence o...

[Phys. Rev. Lett. 121, 024501] Published Mon Jul 09, 2018

]]>We have developed an experimental platform for the National Ignition Facility that uses spherically converging shock waves for absolute equation-of-state (EOS) measurements along the principal Hugoniot. In this Letter, we present one indirect-drive implosion experiment with a polystyrene sample that...

[Phys. Rev. Lett. 121, 025001] Published Mon Jul 09, 2018

]]>One of the most challenging problems in correlated topological systems is a realization of the reduction of topological classification, but very few experimental platforms have been proposed so far. We here demonstrate that ultracold dipolar fermions (e.g., ${}^{167}\mathrm{Er}$, ${}^{161}\mathrm{Dy}$, and ${}^{53}\mathrm{Cr}$) loaded in an optic...

[Phys. Rev. Lett. 121, 025301] Published Mon Jul 09, 2018

]]>We study theoretically the nonreciprocal charge transport in two-dimensional noncentrosymmetric superconductors with the Rashba spin-orbit interaction. The resistivity $R$ depends on the current $I$ linearly under the external magnetic field $B$, i.e., $R={R}_{0}(1+\gamma BI)$, which is called the magnetochiral anisot...

[Phys. Rev. Lett. 121, 026601] Published Mon Jul 09, 2018

]]>We show that novel low temperature properties of bulk ${\mathrm{SmB}}_{6}$, including the sudden growth of the de Haas–van Alphen (dHvA) amplitude (and heat capacity) at millikelvin temperatures and a previously unreported linear-in-temperature bulk electrical conductivity at liquid helium temperatures, signal the ...

[Phys. Rev. Lett. 121, 026602] Published Mon Jul 09, 2018

]]>A wide variety of two-dimensional electron systems allow for independent control of the total and relative charge density of two-component fractional quantum Hall (FQH) states. In particular, a recent experiment on bilayer graphene (BLG) observed a continuous transition between a compressible and in...

[Phys. Rev. Lett. 121, 026603] Published Mon Jul 09, 2018

]]>Heat transport studies of fractional quantum Hall systems provide evidence for a new phase of matter with potential applications in fault-tolerant quantum computation.

[Phys. Rev. Lett. 121, 026801] Published Mon Jul 09, 2018

]]>We study dephasing in an electronic Mach-Zehnder (MZ) interferometer based on quantum Hall edge states by a micrometer-sized Ohmic contact embedded in one of its arms. We find that at the filling factor $\nu =1$, as well as in the case where an Ohmic contact is connected to a MZ interferometer by a quant...

[Phys. Rev. Lett. 121, 026802] Published Mon Jul 09, 2018

]]>We present the strain and temperature dependence of an anomalous nematic phase in optimally doped ${\mathrm{BaFe}}_{2}(\mathrm{As},\mathrm{P}{)}_{2}$. Polarized ultrafast optical measurements reveal broken fourfold rotational symmetry in a temperature range above ${T}_{c}$ in which bulk probes do not detect a phase transition. Using ultrafast m...

[Phys. Rev. Lett. 121, 027001] Published Mon Jul 09, 2018

]]>Previous studies showed that, as ferroelectric films become thinner, their Curie temperature (${T}_{c}$) and polarization below ${T}_{c}$ both typically decrease. In contrast, a recent experiment [Chang *et al.*, Science **353**, 274 (2016)] observed that atomic-thick SnTe films have a higher ${T}_{c}$ than their bulk counter...

[Phys. Rev. Lett. 121, 027601] Published Mon Jul 09, 2018

]]>We demonstrate the efficient transfer of molecules from a magneto-optical trap into a conservative magnetic quadrupole trap. Our scheme begins with a blue-detuned optical molasses to cool SrF molecules to $\approx 50\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mu \mathrm{K}$. Next, we optically pump the molecules into a strongly trapped sublevel. This two-step ...

[Phys. Rev. Lett. 121, 013202] Published Fri Jul 06, 2018

]]>Mobile impurities in a Bose-Einstein condensate form quasiparticles called polarons. Here, we show that two such polarons can bind to form a bound bipolaron state. Its emergence is caused by an induced nonlocal interaction mediated by density oscillations in the condensate, and we derive using field...

[Phys. Rev. Lett. 121, 013401] Published Fri Jul 06, 2018

]]>Simulations and high-resolution imaging show that segregation of solutes in silicon occurs at facet junctions and not at grain boundary planes, contrary to the common view of impurity behavior.

[Phys. Rev. Lett. 121, 015702] Published Fri Jul 06, 2018

]]>We present numerical evidence that most two-dimensional surface states of a bulk topological superconductor (TSC) sit at an integer quantum Hall plateau transition. We study TSC surface states in class CI with quenched disorder. Low-energy (finite-energy) surface states were expected to be criticall...

[Phys. Rev. Lett. 121, 016802] Published Fri Jul 06, 2018

]]>We report the observation of the intrinsic dampinglike spin-orbit torque (SOT) arising from the Berry curvature in metallic-$\text{magnet}/{\mathrm{CuO}}_{x}$ heterostructures. We show that a robust dampinglike SOT, an order of magnitude larger than a fieldlike SOT, is generated in the heterostructure despite the absence ...

[Phys. Rev. Lett. 121, 017202] Published Fri Jul 06, 2018

]]>We use x-ray tomography to investigate the translational and rotational dynamical heterogeneities of a three dimensional hard ellipsoid granular packing driven by oscillatory shear. We find that particles which translate quickly form clusters with a size distribution given by a power law with an exp...

[Phys. Rev. Lett. 121, 018002] Published Fri Jul 06, 2018

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