http://pra.aps.org/ Recently published articles in Phys. Rev. A in the Table of Content section "Quantum information" en-us Copyright (c) 2009 The American Physical Society 2009-11-22T06:19:43-05:00 assocpub@aps.org rss@aps.org hourly 4 2009-11-22T06:19:43-05:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevA.80.052327 Author(s): Noah Linden and James Sharam<br/>We study a natural construction of a general class of inhomogeneous quantum walks (namely, walks whose transition probabilities depend on position). Within the class we analyze walks that are periodic in position and show that, depending on the period, such walks can be bounded or unbounded in time;...<br/>[Phys. Rev. A 80, 052327] Published Fri Nov 20, 2009 Noah Linden and James Sharam 2009-11-20T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052327 Phys. Rev. A 80, 052327 text/html article Physical Review A 80 5 2009-11-20T00:00:00-05:00 052327 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052326 Author(s): Wolfram Helwig, Wolfgang Mauerer, and Christine Silberhorn<br/>Every security analysis of quantum-key distribution (QKD) relies on a faithful modeling of the employed quantum states. Many photon sources, such as for instance a parametric down-conversion (PDC) source, require a multimode description but are usually only considered in a single-mode representation...<br/>[Phys. Rev. A 80, 052326] Published Thu Nov 19, 2009 Wolfram Helwig, Wolfgang Mauerer, and Christine Silberhorn 2009-11-19T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052326 Phys. Rev. A 80, 052326 text/html article Physical Review A 80 5 2009-11-19T00:00:00-05:00 052326 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052325 Author(s): T. Brougham, G. M. Nikolopoulos, and I. Jex<br/>Perfect state transfer (PST) is discussed in the context of passive quantum networks with logical bus topology, where many logical nodes communicate using the same shared media without any external control. The conditions under which a number of point-to-point PST links may serve as building blocks ...<br/>[Phys. Rev. A 80, 052325] Published Thu Nov 19, 2009 T. Brougham, G. M. Nikolopoulos, and I. Jex 2009-11-19T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052325 Phys. Rev. A 80, 052325 text/html article Physical Review A 80 5 2009-11-19T00:00:00-05:00 052325 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052324 Author(s): Pavel Lougovski and S. J. van Enk<br/>We discuss how to characterize entanglement sources with finite sets of measurements. The measurements do not have to be tomographically complete and may consist of POVMs rather than von Neumann measurements. Our method yields a probability that the source generates an entangled state as well as est...<br/>[Phys. Rev. A 80, 052324] Published Wed Nov 18, 2009 Pavel Lougovski and S. J. van Enk 2009-11-18T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052324 Phys. Rev. A 80, 052324 text/html article Physical Review A 80 5 2009-11-18T00:00:00-05:00 052324 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052323 Author(s): Wenxian Zhang, Paola Cappellaro, Natania Antler, Brian Pepper, David G. Cory, Viatcheslav V. Dobrovitski, Chandrasekhar Ramanathan, and Lorenza Viola<br/>The ^{19} F spins in a crystal of fluorapatite have often been used to experimentally approximate a one-dimensional spin system. Under suitable multipulse control, the nuclear-spin dynamics may be modeled to first approximation by a double-quantum one-dimensional Hamiltonian, which is analytically s...<br/>[Phys. Rev. A 80, 052323] Published Tue Nov 17, 2009 Wenxian Zhang, Paola Cappellaro, Natania Antler, Brian Pepper, David G. Cory, Viatcheslav V. Dobrovitski, Chandrasekhar Ramanathan, and Lorenza Viola 2009-11-17T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052323 Phys. Rev. A 80, 052323 text/html article Physical Review A 80 5 2009-11-17T00:00:00-05:00 052323 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052322 Author(s): H. Sugimoto, T. Hashimoto, M. Horibe, and A. Hayashi<br/>We investigate a state discrimination problem which interpolates minimum error and unambiguous discrimination by introducing a margin for the probability of error. We closely analyze discrimination of two pure states with general occurrence probabilities. The optimal measurements are classified into...<br/>[Phys. Rev. A 80, 052322] Published Tue Nov 17, 2009 H. Sugimoto, T. Hashimoto, M. Horibe, and A. Hayashi 2009-11-17T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052322 Phys. Rev. A 80, 052322 text/html article Physical Review A 80 5 2009-11-17T00:00:00-05:00 052322 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.054301 Author(s): X. L. Huang (黄晓理), J. L. Guo (郭金良), and X. X. Yi (衣学喜)<br/>Making use of the master equation and effective Hamiltonian approach, we investigate the steady-state entanglement in a three-qubit XX model. Both symmetric and nonsymmetric qubit-qubit couplings are considered. The system (the three qubits) is coupled to two bosonic baths at different temperatures....<br/>[Phys. Rev. A 80, 054301] Published Mon Nov 16, 2009 X. L. Huang (黄晓理), J. L. Guo (郭金良), and X. X. Yi (衣学喜) 2009-11-16T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.054301 Phys. Rev. A 80, 054301 text/html article Physical Review A 80 5 2009-11-16T00:00:00-05:00 054301 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052321 Author(s): K. Thyagarajan, J. Lugani, S. Ghosh, K. Sinha, A. Martin, D. B. Ostrowsky, O. Alibart, and S. Tanzilli<br/>In this paper, we address the issue of the generation of nondegenerate cross-polarization-entangled photon pairs using type-II periodically poled lithium niobate. We show that, by an appropriate engineering of the quasi-phase-matching grating, it is possible to simultaneously satisfy the conditions ...<br/>[Phys. Rev. A 80, 052321] Published Fri Nov 13, 2009 K. Thyagarajan, J. Lugani, S. Ghosh, K. Sinha, A. Martin, D. B. Ostrowsky, O. Alibart, and S. Tanzilli 2009-11-13T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052321 Phys. Rev. A 80, 052321 text/html article Physical Review A 80 5 2009-11-13T00:00:00-05:00 052321 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052320 Author(s): Shengshi Pang (庞盛世) and Shengjun Wu (吴盛俊)<br/>Given n linearly independent pure states and their prior probabilities, we study the optimum unambiguous state discrimination problem. We derive the conditions for the optimum measurement strategy to achieve the maximum average success probability and establish two sets of equations that must be sat...<br/>[Phys. Rev. A 80, 052320] Published Thu Nov 12, 2009 Shengshi Pang (庞盛世) and Shengjun Wu (吴盛俊) 2009-11-12T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052320 Phys. Rev. A 80, 052320 text/html article Physical Review A 80 5 2009-11-12T00:00:00-05:00 052320 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052319 Author(s): Christian K. Burrell, Jens Eisert, and Tobias J. Osborne<br/>We investigate the propagation of information through one-dimensional nearest-neighbor interacting quantum spin chains in the presence of external fields which fluctuate independently on each site. We study two fundamentally different models: (i) a model with general nearest-neighbor interactions in...<br/>[Phys. Rev. A 80, 052319] Published Thu Nov 12, 2009 Christian K. Burrell, Jens Eisert, and Tobias J. Osborne 2009-11-12T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052319 Phys. Rev. A 80, 052319 text/html article Physical Review A 80 5 2009-11-12T00:00:00-05:00 052319 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052318 Author(s): Gerardo A. Paz-Silva, Gavin K. Brennen, and Jason Twamley<br/>We present a scheme to perform universal quantum computation using global control with an arbitrary subsystem dimension (not necessarily finite). The scheme is developed over a one spatial dimension N -element array, using only mirror-symmetric logical encoding, global pulses for single subsystem op...<br/>[Phys. Rev. A 80, 052318] Published Thu Nov 12, 2009 Gerardo A. Paz-Silva, Gavin K. Brennen, and Jason Twamley 2009-11-12T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052318 Phys. Rev. A 80, 052318 text/html article Physical Review A 80 5 2009-11-12T00:00:00-05:00 052318 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052317 Author(s): Su-Peng Kou<br/>In this paper, the degenerate ground states of Z_{2} topological order on a plane with holes (the so-called planar codes) are used as the protected code subspace to build a topological quantum computer by tuning their quantum tunneling effect. Using a designer Hamiltonian—the Kitaev toric-code mod...<br/>[Phys. Rev. A 80, 052317] Published Thu Nov 12, 2009 Su-Peng Kou 2009-11-12T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052317 Phys. Rev. A 80, 052317 text/html article Physical Review A 80 5 2009-11-12T00:00:00-05:00 052317 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052316 Author(s): X. X. Yi, X. L. Huang, Chunfeng Wu, and C. H. Oh<br/>We present a scheme to drive a finite-dimensional quantum system into the decoherence-free subspaces (DFS) by Lyapunov control. Control fields are established by Lyapunov function. This proposal works well for both closed and open quantum systems, with replacing the DFS by desired subspaces for clos...<br/>[Phys. Rev. A 80, 052316] Published Thu Nov 12, 2009 X. X. Yi, X. L. Huang, Chunfeng Wu, and C. H. Oh 2009-11-12T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052316 Phys. Rev. A 80, 052316 text/html article Physical Review A 80 5 2009-11-12T00:00:00-05:00 052316 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052315 Author(s): Sayatnova Tamaryan, Tzu-Chieh Wei, and DaeKil Park<br/>Bipartite maximally entangled states have the property that the largest Schmidt coefficient reaches its lower bound. However, for multipartite states, the standard Schmidt decomposition generally does not exist. We use a generalized Schmidt decomposition and the geometric measure of entanglement to ...<br/>[Phys. Rev. A 80, 052315] Published Wed Nov 11, 2009 Sayatnova Tamaryan, Tzu-Chieh Wei, and DaeKil Park 2009-11-11T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052315 Phys. Rev. A 80, 052315 text/html article Physical Review A 80 5 2009-11-11T00:00:00-05:00 052315 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052314 Author(s): Richard A. Low<br/>Given oracle access to an unknown unitary C from the Clifford group and its conjugate, we give an exact algorithm for identifying C with O(n) queries, which we prove is optimal. We then extend this to all levels of the Gottesman-Chuang hierarchy (also known as the C_{k} hierarchy). Further, for unit...<br/>[Phys. Rev. A 80, 052314] Published Wed Nov 11, 2009 Richard A. Low 2009-11-11T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052314 Phys. Rev. A 80, 052314 text/html article Physical Review A 80 5 2009-11-11T00:00:00-05:00 052314 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052313 Author(s): Guo Chuan Thiang, Philippe Raynal, and Berthold-Georg Englert<br/>We use the language of semidefinite programming and duality to derive necessary and sufficient conditions for the optimal Lewenstein-Sanpera decomposition (LSD) of two-qubit states. We first provide a simple and natural derivation of the Wellens-Kuś equations for full-rank states. Then, we obtain a...<br/>[Phys. Rev. A 80, 052313] Published Wed Nov 11, 2009 Guo Chuan Thiang, Philippe Raynal, and Berthold-Georg Englert 2009-11-11T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052313 Phys. Rev. A 80, 052313 text/html article Physical Review A 80 5 2009-11-11T00:00:00-05:00 052313 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052312 Author(s): Austin G. Fowler, Ashley M. Stephens, and Peter Groszkowski<br/>We present a comprehensive and self-contained simplified review of the quantum computing scheme of Raussendorf [Phys. Rev. Lett. 98, 190504 (2007); N. J. Phys. 9, 199 (2007)], which features a two-dimensional nearest-neighbor coupled lattice of qubits, a threshold error rate approaching 1%, natural ...<br/>[Phys. Rev. A 80, 052312] Published Wed Nov 11, 2009 Austin G. Fowler, Ashley M. Stephens, and Peter Groszkowski 2009-11-11T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052312 Phys. Rev. A 80, 052312 text/html article Physical Review A 80 5 2009-11-11T00:00:00-05:00 052312 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052311 Author(s): Yukihiro Ota, Yoshito Goto, Yasushi Kondo, and Mikio Nakahara<br/>A proposal for applying nonadiabatic geometric phases to quantum computing, called double-loop method [S.-L. Zhu and Z. D. Wang, Phys. Rev. A 67, 022319 (2003)], is demonstrated in a liquid-state nuclear magnetic-resonance quantum computer. Using a spin-echo technique, the original method is modifie...<br/>[Phys. Rev. A 80, 052311] Published Tue Nov 10, 2009 Yukihiro Ota, Yoshito Goto, Yasushi Kondo, and Mikio Nakahara 2009-11-10T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052311 Phys. Rev. A 80, 052311 text/html article Physical Review A 80 5 2009-11-10T00:00:00-05:00 052311 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052310 Author(s): Saikat Guha and Baris I. Erkmen<br/>The signal half of an entangled twin beam, generated using spontaneous parametric downconversion, interrogates a region of space that is suspected of containing a target and has high loss and high (entanglement-breaking) background noise. A joint measurement is performed on the returned light and th...<br/>[Phys. Rev. A 80, 052310] Published Tue Nov 10, 2009 Saikat Guha and Baris I. Erkmen 2009-11-10T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052310 Phys. Rev. A 80, 052310 text/html article Physical Review A 80 5 2009-11-10T00:00:00-05:00 052310 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052309 Author(s): Alessandro Cosentino and Simone Severini<br/>We prove a connection between Schmidt rank and weight of quadratic forms. This provides a new tool for the classification of graph states based on entanglement. Our main tool arises from a reformulation of previously known results concerning the weight of quadratic forms in terms of graph states pro...<br/>[Phys. Rev. A 80, 052309] Published Mon Nov 09, 2009 Alessandro Cosentino and Simone Severini 2009-11-09T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052309 Phys. Rev. A 80, 052309 text/html article Physical Review A 80 5 2009-11-09T00:00:00-05:00 052309 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052308 Author(s): Chun-Hsu Su, Andrew D. Greentree, and Lloyd C. L. Hollenberg<br/>Quantum communication places stringent requirements on single-photon sources. Here we report a theoretical study of the cavity Purcell enhancement of two diamond point defects, the nickel-nitrogen (NE8) and silicon-vacancy (SiV) centers, for high-performance, near on-demand single-photon generation....<br/>[Phys. Rev. A 80, 052308] Published Mon Nov 09, 2009 Chun-Hsu Su, Andrew D. Greentree, and Lloyd C. L. Hollenberg 2009-11-09T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052308 Phys. Rev. A 80, 052308 text/html article Physical Review A 80 5 2009-11-09T00:00:00-05:00 052308 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052307 Author(s): M. A. Jafarizadeh, K. Aghayar, and A. Heshmati<br/>We consider the problem of obtaining the entanglement witnesses for a given quantum system. We present a method to convert this problem to a standard convex optimization problem by defining a feasible region. Then we develop a generic two-step algorithm for this problem which can be applied to the e...<br/>[Phys. Rev. A 80, 052307] Published Mon Nov 09, 2009 M. A. Jafarizadeh, K. Aghayar, and A. Heshmati 2009-11-09T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052307 Phys. Rev. A 80, 052307 text/html article Physical Review A 80 5 2009-11-09T00:00:00-05:00 052307 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052306 Author(s): Miguel Navascués, Masaki Owari, and Martin B. Plenio<br/>In this paper, we present progress on the study of the symmetric extension criterion for separability. First, we show that a perturbation of order O(1/N) is sufficient and, in general, necessary to destroy the entanglement of any state admitting an N Bose-symmetric extension. On the other hand, the ...<br/>[Phys. Rev. A 80, 052306] Published Fri Nov 06, 2009 Miguel Navascués, Masaki Owari, and Martin B. Plenio 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052306 Phys. Rev. A 80, 052306 text/html article Physical Review A 80 5 2009-11-06T00:00:00-05:00 052306 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.050301 Author(s): Salvatore M. Giampaolo and Fabrizio Illuminati<br/>We introduce quantum spin models whose ground states allow for sizable entanglement between distant spins. We discuss how spin models with global end-to-end entanglement realize quantum teleportation channels with optimal compromise between scalability and resilience to thermal decoherence and can b...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. A 80, 050301] Published Fri Nov 06, 2009 Salvatore M. Giampaolo and Fabrizio Illuminati 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.050301 Phys. Rev. A 80, 050301 text/html article Physical Review A 80 5 2009-11-06T00:00:00-05:00 050301 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052305 Author(s): Boris F. Samsonov<br/>The necessary and sufficient conditions for minimization of the generalized rate error for discriminating among N pure qubit states are reformulated in terms of Bloch vectors representing the states. For the direct optimization problem, an algorithmic solution to these conditions is indicated. A sol...<br/>[Phys. Rev. A 80, 052305] Published Wed Nov 04, 2009 Boris F. Samsonov 2009-11-04T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052305 Phys. Rev. A 80, 052305 text/html article Physical Review A 80 5 2009-11-04T00:00:00-05:00 052305 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052304 Author(s): Animesh Datta<br/>We calculate the quantum discord between two free modes of a scalar field, which start in a maximally entangled state and then undergo a relative constant acceleration. In a regime where there is no distillable entanglement due to the Unruh effect, we show that there is a finite amount of quantum di...<br/>[Phys. Rev. A 80, 052304] Published Wed Nov 04, 2009 Animesh Datta 2009-11-04T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052304 Phys. Rev. A 80, 052304 text/html article Physical Review A 80 5 2009-11-04T00:00:00-05:00 052304 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052303 Author(s): Adam Miranowicz, Marco Piani, Paweł Horodecki, and Ryszard Horodecki<br/>Inseparability criteria for continuous and discrete bipartite quantum states based on moments of annihilation and creation operators are studied by developing the idea of Shchukin-Vogel criterion [Phys. Rev. Lett. 95, 230502 (2005)]. If a state is separable, then the corresponding matrix of moments ...<br/>[Phys. Rev. A 80, 052303] Published Tue Nov 03, 2009 Adam Miranowicz, Marco Piani, Paweł Horodecki, and Ryszard Horodecki 2009-11-03T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052303 Phys. Rev. A 80, 052303 text/html article Physical Review A 80 5 2009-11-03T00:00:00-05:00 052303 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052302 Author(s): D. B. Hume, C. W. Chou, T. Rosenband, and D. J. Wineland<br/>We have investigated theoretically and experimentally a method for preparing Dicke states in trapped atomic ions. We consider a linear chain of N ion qubits that is prepared in a particular Fock state of motion |m⟩ . The m phonons are removed by applying a laser pulse globally to the N qubits and ...<br/>[Phys. Rev. A 80, 052302] Published Mon Nov 02, 2009 D. B. Hume, C. W. Chou, T. Rosenband, and D. J. Wineland 2009-11-02T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052302 Phys. Rev. A 80, 052302 text/html article Physical Review A 80 5 2009-11-02T00:00:00-05:00 052302 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.052301 Author(s): F. M. Andrade and M. G. E. da Luz<br/>Coin and scattering are the two major formulations for discrete quantum walks models, each believed to have its own advantages in different applications. Although they are related in some cases, it was an open question their equivalence in arbitrary topologies. Here we present a general construction...<br/>[Phys. Rev. A 80, 052301] Published Mon Nov 02, 2009 F. M. Andrade and M. G. E. da Luz 2009-11-02T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.052301 Phys. Rev. A 80, 052301 text/html article Physical Review A 80 5 2009-11-02T00:00:00-05:00 052301 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.80.042333 Author(s): Thomas Barthel, Carlos Pineda, and Jens Eisert<br/>A fermionic operator circuit is a product of fermionic operators of usually different and partially overlapping support. Further elements of fermionic operator circuits (FOCs) are partial traces and partial projections. The presented framework allows for the introduction of fermionic versions of kno...<br/>[Phys. Rev. A 80, 042333] Published Fri Oct 30, 2009 Thomas Barthel, Carlos Pineda, and Jens Eisert 2009-10-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.80.042333 Phys. Rev. A 80, 042333 text/html article Physical Review A 80 4 2009-10-30T00:00:00-04:00 042333 Quantum information Quantum information