Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Evgueni Karpov"'
Publikováno v:
Applied Sciences, Vol 9, Iss 20, p 4264 (2019)
In the context of multiparameter quantum estimation theory, we investigate the construction of linear schemes in order to infer two classical parameters that are encoded in the quadratures of two quantum coherent states. The optimality of the scheme
Externí odkaz:
https://doaj.org/article/8a4938af77a44fa9aac77653608a773d
Publikováno v:
Applied Sciences (Switzerland), 9 (20
Applied Sciences, Vol 9, Iss 20, p 4264 (2019)
Applied Sciences
Volume 9
Issue 20
Applied Sciences, Vol 9, Iss 20, p 4264 (2019)
Applied Sciences
Volume 9
Issue 20
In the context of multiparameter quantum estimation theory, we investigate the construction of linear schemes in order to infer two classical parameters that are encoded in the quadratures of two quantum coherent states. The optimality of the scheme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fae52b84a062fb8d1e4dc349c50598f
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/294845
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/294845
We study the feasibility of generating photon pairs in a resonant Vertical-Cavity Surface-Emitting Laser (VCSEL) as a result of a third-order non-linear, four wave mixing interaction. We focus on degenerate four wave mixing in the spontaneous regime
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce74296f26bc59d7b76cd7a1b1959349
https://biblio.vub.ac.be/vubir/semiconductor-surface-emitting-lasers-for-photon-pairs-generation(822de18d-2fbe-4621-879d-33a3d88c1348).html
https://biblio.vub.ac.be/vubir/semiconductor-surface-emitting-lasers-for-photon-pairs-generation(822de18d-2fbe-4621-879d-33a3d88c1348).html
Publikováno v:
Physical Review A. 93
Currently available separability criteria for continuous-variable states are generally based on the covariance matrix of quadrature operators. The well-known separability criterion of Duan et al. [Phys. Rev. Lett. 84, 2722 (2000)] and Simon [Phys. Re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26ea75c97e408d86e071be0e7bf92e5a
https://doi.org/10.1103/physreva.93.032330
https://doi.org/10.1103/physreva.93.032330
Publikováno v:
Physics of Particles and Nuclei Letters. 4:112-118
We derive a quantum cloning machine that maximizes the entanglement of formation of the two copies of any maximally entangled input state, while preserving the separability of all unentangled input states. In addition, it is proven to optimally dupli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9c183a126bc2c27276af49fb623c741
https://doi.org/10.1134/s1547477107020021
https://doi.org/10.1134/s1547477107020021
Publikováno v:
International Journal of Theoretical Physics. 42:2403-2421
We study the medium-time behavior of the survival probability in the frame of the N-level Friedrichs model. The time evolution of an arbitrary unstable initial state is determined. We show that the survival probability may oscillate significantly dur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df276348d2c1901dab4ddae32392f0e6
https://doi.org/10.1023/b:ijtp.0000005966.53444.b8
https://doi.org/10.1023/b:ijtp.0000005966.53444.b8
Publikováno v:
Chaos, Solitons & Fractals. 17:311-315
We analyze the short-time behaviour of the survival probability in the frame of the Friedrichs model for different formfactors. We have shown that the probability may not be quadratic for the short times while the quantum Zeno effect (QZE) still exis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dfcc2de1ee6866474f402bb333815d0
https://doi.org/10.1016/s0960-0779(02)00359-4
https://doi.org/10.1016/s0960-0779(02)00359-4
Publikováno v:
Chaos, Solitons & Fractals. 17:277-281
Hegerfeldt has shown that quantum systems with positive energy initially localized in a finite region, immediately develop infinite tails. We analyze Hegerfeldt’s theorem using quantum and classical wave packets and investigate the applicability of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3143f14c3e4c11721f3fb05f2fbd341c
https://doi.org/10.1016/s0960-0779(02)00352-1
https://doi.org/10.1016/s0960-0779(02)00352-1
Publikováno v:
AIP Conference Proceedings.
We introduce new type of superadditivity for classical capacity of quantum channels, which involves the properties of channels’ environment. By imposing different restrictions on the total energy contained in channels’ environment we can consider
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ded788b0d283d3f95c1186a4841112d0
https://doi.org/10.1063/1.4903133
https://doi.org/10.1063/1.4903133
Publikováno v:
AIP Conference Proceedings.
We seek for a realistic implementation of multimode Gaussian entangled states that can realize the optimal encoding for quantum bosonic Gaussian channels with memory. For a Gaussian channel with classical additive Markovian correlated noise and a los
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca174057d7023d8dcaef1471ad5843b6
https://doi.org/10.1063/1.4903134
https://doi.org/10.1063/1.4903134