Results 21 to 30 of about 824,226 (150)
Optimal Gaussian measurements for phase estimation in single-mode Gaussian metrology [PDF]
, 2019 The central issue in quantum parameter estimation is to find out the optimal measurement setup that leads to the ultimate lower bound of an estimation error.
Jeong, Hyunseok +6 more
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Classical simulation of Gaussian quantum circuits with non-Gaussian input states
Physical Review Research, 2021 We consider Gaussian quantum circuits supplemented with non-Gaussian input states and derive sufficient conditions for efficient classical strong simulation of these circuits. In particular, we generalise the stellar representation of continuous-variable
Ulysse Chabaud +3 more
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Operational discord measure for Gaussian states with Gaussian measurements
New Journal of Physics, 2015 We introduce an operational discord-type measure for quantifying nonclassical correlations in bipartite Gaussian states based on using Gaussian measurements. We refer to this measure as operational Gaussian discord (OGD).
Saleh Rahimi-Keshari +2 more
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Standard forms and entanglement engineering of multimode Gaussian states under local operations [PDF]
, 2007 We investigate the action of local unitary operations on multimode (pure or mixed) Gaussian states and single out the minimal number of locally invariant parametres which completely characterise the covariance matrix of such states.
Adesso, Gerardo, Serafini, Alessio
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Gaussian entanglement revisited
New Journal of Physics, 2018 We present a novel approach to the separability problem for Gaussian quantum states of bosonic continuous variable systems. We derive a simplified necessary and sufficient separability criterion for arbitrary Gaussian states of m versus n modes, which ...
Ludovico Lami +2 more
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A Computable Gaussian Quantum Correlation for Continuous-Variable Systems
Entropy, 2021 Generally speaking, it is difficult to compute the values of the Gaussian quantum discord and Gaussian geometric discord for Gaussian states, which limits their application.
Liang Liu, Jinchuan Hou, Xiaofei Qi
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Quantifying entanglement in two-mode Gaussian states [PDF]
, 2017 Entangled two-mode Gaussian states are a key resource for quantum information technologies such as teleportation, quantum cryptography and quantum computation, so quantification of Gaussian entanglement is an important problem.
Ralph, Timothy C., Tserkis, Spyros
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Multi-copy activation of genuine multipartite entanglement in continuous-variable systems [PDF]
QuantumMulti-copy activation of genuine multipartite entanglement (GME) is a phenomenon whereby multiple copies of biseparable but fully inseparable states can exhibit GME. This was shown to be generically possible in finite dimensions.
Klára Baksová +4 more
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Comptes Rendus. Physique, 2022 In an ensemble of two-level atoms that can be described in terms of a collective spin, entangled states can be used to enhance the sensitivity of interferometric precision measurements.
Baamara, Youcef +2 more
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Non-Gaussian quantum discord for Gaussian states
, 2012 In recent years the paradigm based on entanglement as the unique measure of quantum correlations has been challenged by the rise of new correlation concepts, such as quantum discord, able to reveal quantum correlations that are present in separable ...
Matteo G. A. Paris +3 more
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