Measurement-induced Nonlocality for Gaussian States
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-016-3255-9
Abstract: We establish an analytic formula of measurement-induced nonlocality (MIN) for two-mode squeezed thermal states and mixed thermal states. Different from the quantum discord case, we show that there is no Gaussian version of MIN by… read more here.
Keywords: nonlocality gaussian; induced nonlocality; measurement induced; gaussian states ... See more keywords
Decoherence and nonclassicality of photon-added and photon-subtracted multimode Gaussian states
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review A"
DOI: 10.1103/physreva.107.043713
Abstract: Photon addition and subtraction render Gaussian states non-Gaussian. We provide a quantitative analysis of the change in nonclassicality produced by these processes by analyzing the Wigner negativity and quadrature coherence scale (QCS) of the resulting… read more here.
Keywords: photon added; decoherence nonclassicality; photon subtracted; photon ... See more keywords
All Pure Fermionic Non-Gaussian States Are Magic States for Matchgate Computations.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.080503
Abstract: Magic states were introduced in the context of Clifford circuits as a resource that elevates classically simulatable computations to quantum universal capability, while maintaining the same gate set. Here we study magic states in the… read more here.
Keywords: pure fermionic; fermionic non; magic states; gaussian states ... See more keywords
Dynamics-Based Entanglement Witnesses for Non-Gaussian States of Harmonic Oscillators.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.130.160201
Abstract: We introduce a family of entanglement witnesses for continuous variable systems, which rely on the sole assumption that their dynamics is that of coupled harmonic oscillators at the time of the test. Entanglement is inferred… read more here.
Keywords: based entanglement; harmonic oscillators; non gaussian; gaussian states ... See more keywords
Quadratic dissipative evolution of Gaussian states with drift
Sign Up to like & getrecommendations! Published in 2017 at "Mathematical Notes"
DOI: 10.1134/s0001434617010370
Abstract: The solution of the Cauchy problem for the Gorini–Kossakowski–Sudarshan–Lindblad equation describing the irreversible quantum evolution of an n-particle system with a generator, which is a quadratic function in creation-annihilation operators, is reduced to the calculation… read more here.
Keywords: evolution gaussian; evolution; quadratic dissipative; states drift ... See more keywords
Fidelity-based unitary operation-induced quantum correlation for continuous-variable systems
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Quantum Information"
DOI: 10.1142/s0219749919500357
Abstract: We propose a measure of nonclassical correlation [Formula: see text] in terms of local Gaussian unitary operations based on square of the fidelity [Formula: see text] for bipartite continuous-variable systems. This quantity is easier to… read more here.
Keywords: continuous variable; formula see; gaussian states; see text ... See more keywords
Symmetric Logarithmic Derivative of Fermionic Gaussian States
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DOI: 10.3390/e20070485
Abstract: In this article, we derive a closed form expression for the symmetric logarithmic derivative of Fermionic Gaussian states. This provides a direct way of computing the quantum Fisher Information for Fermionic Gaussian states. Applications range… read more here.
Keywords: symmetric logarithmic; gaussian states; logarithmic derivative; derivative fermionic ... See more keywords
Quantum Correlation Based on Uhlmann Fidelity for Gaussian States
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DOI: 10.3390/e21010006
Abstract: A quantum correlation NFG,A for (n+m)-mode continuous-variable systems is introduced in terms of local Gaussian unitary operations performed on Subsystem A based on Uhlmann fidelity F. This quantity is a remedy for the local ancilla… read more here.
Keywords: quantum correlation; based uhlmann; uhlmann fidelity; gaussian states ... See more keywords
Gaussian States: Evaluation of the Covariance Matrix from the Implementation with Primitive Component
Sign Up to like & getrecommendations! Published in 2022 at "Symmetry"
DOI: 10.3390/sym14071286
Abstract: Quantum Gaussian states play a fundamental role in quantum communications and in quantum information. This paper deals with the implementation of multimode, and particularly of two-mode Gaussian unitaries and Gaussian states with primitive components (phase… read more here.
Keywords: states evaluation; evaluation covariance; covariance matrix; matrix implementation ... See more keywords