Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Aurelian Isar"'
Publikováno v:
iScience, Vol 26, Iss 12, Pp 108563- (2023)
Summary: We investigate the influence of the seed of measurement on the performance of a Szilard engine based on a two-mode Gaussian state evolving in a noisy channel. Quantum work is extracted by performing a positive operator-valued measurement (PO
Externí odkaz:
https://doaj.org/article/adf3fdee3e13422ab36507fc596cda86
Autor:
Madalin Calamanciuc, Aurelian Isar
Publikováno v:
Results in Physics, Vol 55, Iss , Pp 107167- (2023)
The influence of Hawking radiation on quantum entanglement for bimodal Gaussian states near a Schwarzschild black hole is investigated. It is shown that for a thermal squeezed state of a bimodal bosonic system the Hawking radiation reduces and even c
Externí odkaz:
https://doaj.org/article/7d38bbaa08f140a6bfd2a3212ad81440
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract We study a Szilard engine based on a Gaussian state of a system consisting of two bosonic modes placed in a noisy channel. As the initial state of the system is taken an entangled squeezed thermal state, and the quantum work is extracted by
Externí odkaz:
https://doaj.org/article/5a3f1b7664774ead95646a99c1b5ef05
Publikováno v:
Results in Physics, Vol 39, Iss , Pp 105700- (2022)
The analytical formula for the fidelity of teleportation from Alice to Bob of a thermal state used as an input state is derived using the characteristic function approach. As a resource state it is used a continuous-variable two-mode bosonic state sh
Externí odkaz:
https://doaj.org/article/6b78de6de650497cb2602c108b029d13
Publikováno v:
New Journal of Physics, Vol 25, Iss 11, p 113023 (2023)
We define and fully characterize the witnesses based on second moments detecting steering in Gaussian states by means of Gaussian measurements. All such tests, which arise from linear combination of variances or second moments of canonical operators,
Externí odkaz:
https://doaj.org/article/885dc803b9814390a9dff7e395b55246
Autor:
Aurelian Isar
Publikováno v:
Entropy, Vol 25, Iss 2, p 196 (2023)
Quantum correlations represent one of the most characteristic traits of quantum mechanics [...]
Externí odkaz:
https://doaj.org/article/0d02bd270d724e0bafeba9ae768bba04
Autor:
Tatiana Mihaescu, Aurelian Isar
Publikováno v:
Entropy, Vol 24, Iss 5, p 696 (2022)
The Markovian time evolution of the entropy production rate is studied as a measure of irreversibility generated in a bipartite quantum system consisting of two coupled bosonic modes immersed in a common thermal environment. The dynamics of the syste
Externí odkaz:
https://doaj.org/article/6a46dcb64fa345969d2490e3f8229ef2
Publikováno v:
Results in Physics, Vol 13, Iss , Pp - (2019)
We describe the dynamics of quantum discord of two interacting spin-1/2’s subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for various input mixed states consisting of classical mixtures of two
Externí odkaz:
https://doaj.org/article/9318cf70bafc4e65966fe3afda5ca2e2
Publikováno v:
Entropy, Vol 22, Iss 7, p 785 (2020)
We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The corresponding quantum dynamics is exactly treated and manifests the appearance and disapp
Externí odkaz:
https://doaj.org/article/97060a7c8558477da1f8e55168f90984
Publikováno v:
New Journal of Physics, Vol 22, Iss 12, p 123041 (2020)
We develop a scheme for the detection of entanglement in any continuous variable system, by constructing an optimal entanglement witness from random homodyne measurements. To this end, we introduce a set of linear constraints that guarantee the neces
Externí odkaz:
https://doaj.org/article/ec315ef84b17403385b9946ac045ea74