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Related papers: Comment on: Local Unitary Equivalence of Multipart…

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We present a way of experimentally determining the concurrence in terms of the expectation values of local observables for arbitrary multipartite pure states. In stead of the joint measurements on two copies of a state in the experiment for…

Quantum Physics · Physics 2015-05-14 Shao-Ming Fei , Ming-Jing Zhao , Kai Chen , Zhi-Xi Wang

The (non-)local content in the sense of Elitzur, Popescu, and Rohrlich (EPR2) [Phys. Lett. A 162, 25 (1992)] is a natural measure for the (non-)locality of quantum states. Its computation is in general difficult, even in low dimensions, and…

Quantum Physics · Physics 2012-07-17 Samuel Portmann , Cyril Branciard , Nicolas Gisin

We study the local unitary equivalence for two and three-qubit mixed states by investigating the invariants under local unitary transformations. For two-qubit system, we prove that the determination of the local unitary equivalence of…

Quantum Physics · Physics 2017-07-14 Bao-zhi Sun , Shao-Ming Fei , Zhi-xi Wang

A Comment on the Letter by Granger et.al., Phys. Rev. Lett. 89, 135506 (2002).

Materials Science · Physics 2007-05-23 Z. C. Tu , Z. C. Ou-Yang

The equivalence of arbitrary dimensional bipartite states under local unitary transformations (LUT) is studied. A set of invariants and ancillary invariants under LUT is presented. We show that two states are equivalent under LUT if and…

Quantum Physics · Physics 2009-11-13 Bao-Zhi Sun , Shao-Ming Fei , Xianqing Li-Jost , Zhi-Xi Wang

This is a reply to Michael Nauenberg's arXiv:1502.00123, to be published in the American Journal of Physics, in which he comments critically on our paper "An introduction to QBism with an application to the locality of quantum mechanics",…

Quantum Physics · Physics 2015-02-11 Christopher A. Fuchs , N. David Mermin , Ruediger Schack

This paper is withdrawn by the author. It is superseded by Makhlin's paper quant-ph/0002045.

Quantum Physics · Physics 2007-05-23 Anthony Sudbery

For two qubits and for general bipartite quantum systems, we give a simple spectral condition in terms of the ordered eigenvalues of the density matrix which guarantees that the corresponding state is separable.

Quantum Physics · Physics 2009-11-13 M. E. Gabach Clement , G. A. Raggio

We present that the local unitary equivalence of n-party pure states is consistent with the one of their (n-1)-party reduced density matrices. As an application, we obtain the local invariants for a class of tripartite pure qudits.

Quantum Physics · Physics 2011-02-01 Zhen Wang , He-Ping Wang , Zhi-Xi Wang , Shao-Ming Fei

Based on a proposed coherence measure, we show that the local coherence of a bipartite quantum pure state (coherence of its reduced density matrix) is exactly the same as the minimal average co- herence with all potential pure-state…

Quantum Physics · Physics 2014-11-04 Chang-shui Yu , He-shan Song

In this Letter, two counterexamples show that the superadditivity inequality of relative entropy is not true even for the full-ranked quantum states. Thus, an inequality of quantum channels and complementary channels is not also true.…

Quantum Physics · Physics 2013-06-10 Lin Zhang , Junde Wu , Shao-Ming Fei

We study the invariants of arbitrary dimensional multipartite quantum states under local unitary transformations. For multipartite pure states, we give a set of invariants in terms of singular values of coefficient matrices. For…

Quantum Physics · Physics 2015-09-04 Ting-Gui Zhang , Ming-Jing Zhao , Xianqing Li-Jost , Shao-Ming Fei

We prove that any three linearly independent pure quantum states can always be locally distinguished with nonzero probability regardless of their dimension, entanglement, or multipartite structure. Almost always, all three states can be…

Quantum Physics · Physics 2015-06-26 Somshubhro Bandyopadhyay , Jonathan Walgate

We make comments on Gaidarzhy {\it et al.}'s [{\it Phys. Rev. Lett.} 94, 030402 (2005)] letter.

Quantum Physics · Physics 2007-05-23 A. Kwang-Hua Chu

We reply to the comment arXiv:quant-ph/0702060 on our letter arXiv:quant-ph/0603120 [Phys. Rev. Lett. 96, 100402 (2006)]

Quantum Physics · Physics 2007-05-23 Robson B. Rodrigues , Paulo A. Maia Neto , Astrid Lambrecht , Serge Reynaud

A Comment on the paper "Conservative Quantum Computing" by M. Ozawa, Phys. Rev. Lett. 89, 057902 (2002). The author replies in Phys. Rev. Lett. 91, 089802 (2003).

Quantum Physics · Physics 2009-11-10 Daniel A. Lidar

This is a reply to the paper by S.C.Benjamin, quant-ph/0008127.

Quantum Physics · Physics 2009-11-06 Luca Marinatto , Tullio Weber

We discuss disentanglement of pure bipartite quantum states within the framework of the schemes developed for entanglement splitting and broadcasting of entanglement.

Quantum Physics · Physics 2009-10-31 Somshubhro Bandyopadhyay , Guruprasad Kar , Anirban Roy