Results 211 to 220 of about 5,417,762 (253)

Correlation Spreading in Quantum Lattice Models with Variable-Range Interactions [PDF]

Julien Despres
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Quantum metrology and quantum correlations

Handbook of Statistics, 2021
D. Bussandri, P. W. Lamberti
semanticscholar   +2 more sources

Semidefinite programming relaxations for quantum correlations

, 2023
Semidefinite programs are convex optimisation problems involving a linear objective function and a domain of positive semidefinite matrices. Over the last two decades, they have become an indispensable tool in quantum information science.
A. Tavakoli, Alejandro Pozas-Kerstjens, Peter J. Brown, M. Ara'ujo   +3 more
semanticscholar   +1 more source

Probing the entropic uncertainty bound and quantum correlations in a quantum dot system

Laser physics, 2021
The uncertainty principle is one of the most comprehensive and fundamental concepts in quantum theory and it states that it is not possible to simultaneously measure two incompatible observables with high accuracy.
S. Haseli, S. Haddadi, M. R. Pourkarimi
semanticscholar   +1 more source

On the quantum correlations in two-qubit XYZ spin chains with Dzyaloshinsky–Moriya and Kaplan–Shekhtman–Entin-Wohlman–Aharony interactions

Quantum Information Processing, 2020
The anisotropic Heisenberg two-spin-1/2 model in an inhomogeneous magnetic field with both antisymmetric Dzyaloshinsky–Moriya and symmetric Kaplan–Shekhtman–Entin-Wohlman–Aharony cross interactions is considered at thermal equilibrium.
M. Yurischev
semanticscholar   +1 more source

Quantum correlations and quantum-memory-assisted entropic uncertainty relation in two kinds of spin squeezing models

Laser Physics Letters, 2019
We investigate thermal quantum correlations and the entropic uncertainty relation in the presence of quantum memory under two kinds of two-qubit spin squeezing models, namely the one-axis twisting model and two-axis countertwisting model.
S. Haddadi, Mohammad Reza Pourkarimi, A. Akhound, M. Ghominejad   +3 more
semanticscholar   +1 more source

Quantum amplification with correlated quantum fields

Physical Review A, 1993
Quantum fluctuations of a phase-insensitive amplifier are studied when the quantum fluctuations of the input field are correlated with the amplifier's internal modes. It is found that noise-free quantum amplification can be achieved under certain conditions and only requires finite correlation between the quantum fluctuations of the input field and the
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Thermal quantum correlations in a two-dimensional spin star model

Modern Physics Letters A, 2019
In this paper, we study the thermal evolution of three types of quantum correlations under the homogeneous and inhomogeneous spin star Hamiltonian. It is shown that quantum discord (QD) is more stable than the other measures in the thermal regime, but ...
S. Haddadi, M. R. Pourkarimi, A. Akhound, M. Ghominejad   +3 more
semanticscholar   +1 more source

Quantum correlations — Spin supercurrents

International Journal of Quantum Information, 2014
The paper concerns some optical phenomena where quantum correlations take place: two-photon and three-photon interference, the photon antibunching, squeezed vacuum. The main properties of quantum correlations are: they do not depend on the distance, do not consume energy, take place for quantum entities both with zero and with nonzero rest mass, take ...
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NON-CLASSICAL QUANTUM CORRELATIONS IN QUANTUM GAMES

International Journal of Modern Physics B, 2004
In this paper we propose an interesting scheme for quantum games. It is found that, for the particular case of the famous Prisoners' Dilemma game, the superiority of the quantum game over its classical counterpart is interconnected to the non-classical quantum correlation between the two players.
Du, Jiangfeng, Cheng, Guanglei, Li, Hui
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