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Detecting quantum entanglement

Theoretical Computer Science, 2002
We review the criteria for separability and quantum entanglement, both in a bipartite as well as a multipartite setting. We discuss Bell inequalities, entanglement witnesses, entropic inequalities, bound entanglement and several features of multipartite entanglement.
openaire   +2 more sources

The Squashed Entanglement of a Quantum Channel [PDF]

IEEE Transactions on Information Theory, 2014
This paper defines the squashed entanglement of a quantum channel as the maximum squashed entanglement that can be registered by a sender and receiver at the input and output of a quantum channel, respectively. A new subadditivity inequality for the original squashed entanglement measure of Christandl and Winter leads to the conclusion that the ...
Masahiro Takeoka, Saikat Guha 0001, Mark M. Wilde   +2 more
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Quantum entanglement and topological entanglement [PDF]

New Journal of Physics, 2002
This paper discusses relationships between topological entanglement and quantum entanglement. Specifically, we propose that it is more fundamental to view topological entanglements such as braids as entanglement operators and to associate with them unitary operators that are capable of creating quantum entanglement.
Louis H Kauffman, Samuel J Lomonaco
openaire   +1 more source

Approximate encoding of quantum states using shallow circuits

npj Quantum Information
Quantum algorithms and simulations often require the preparation of complex states through sequences of 2-qubit gates. For a generic quantum state, the number of required gates grows exponentially with the number of qubits, becoming unfeasible on near ...
Matan Ben-Dov, David Shnaiderov, Adi Makmal, Emanuele G. Dalla Torre   +3 more
doaj   +1 more source

Entanglement purification on quantum networks

Physical Review Research, 2023
We present an approach to entanglement purification on complex quantum network architectures, that is, how a quantum network built from repeaters with limited processing fidelity can purify and distribute entanglement between users.
Michelle Victora, Spyros Tserkis, Stefan Krastanov, Alexander Sanchez de la Cerda, Steven Willis, Prineha Narang   +5 more
doaj   +1 more source

Local approach to quantum entanglement [PDF]

, 2008
Quantum entanglement is the key property that makes quantum information theory different from its classical counterpart and is also a valuable physical resource with massive potential for technological applications.
Lin, H-C, Ho-Chih, L., Lin, H.-C.
core  

Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank

FEBS Open Bio, EarlyView.
Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer, Pawel Rubach, Zbigniew Dauter, Wojciech Dec, Dariusz Brzezinski, Marta Kulik, Wladek Minor, Mariusz Jaskolski   +7 more
wiley   +1 more source

Research on Intraparticle to Interparticle Entanglement Swapping Protocols

Applied Sciences
Entanglement is one of the most striking features of quantum systems, whereby its non-classical correlation is an essential resource in numerous quantum protocols.
Jiangmei Tang, Shaomeng Wang, Bingyang Liang, Yubin Gong   +3 more
doaj   +1 more source

QUANTUM ENTANGLEMENT AND SECRECY

International Journal of Modern Physics A, 2001
This was a talk given at the International Conference on Fundamental Sciences, Mathematics and Theoretical Physics, 13-17 March 2000. This talk provides a general introduction to the field of cryptography and touches upon the surface of many activities presently being pursued under the heading of quantum cryptography.
Exert, A, Oi, D K L, Alves, C M, Kwek, L C, Kaszlikowski, D   +4 more
openaire   +6 more sources

Power of Quantum Entanglement [PDF]

, 2002
Quantum entanglement is arguably the most inherently quantum feature of quantum information, computation and communication — a feature that is at heart of quantum physics. Quantum entanglement is also increasingly often considered as being behind new and surprising power quantum computations and communications exhibit — comparing to the classical ...
Jozef Gruska, Hiroshi Imai, Keiji Matsumoto   +2 more
openaire   +2 more sources