Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Viviescas, Carlos"'
Spin measurement is studied as a unitary time evolution of the spin coupled to an environment representing the meter and the apparatus. Modelling the environment as a heat bath comprising only a finite number of boson modes and represented in a basis
Externí odkaz:
http://arxiv.org/abs/2204.11163
Publikováno v:
Phys. Rev. A 104, 042218 (2021)
Using the quantum map formalism, we provide a framework to construct fuzzy and coarse grained quantum states of many-body systems that account for limitations in the resolution of real measurement devices probing them. The first set of maps handles p
Externí odkaz:
http://arxiv.org/abs/2011.03145
Publikováno v:
Phys. Rev. Lett. 120, 150402 (2018)
We derive a family of Gaussian non-Markovian stochastic Schr\"odinger equations for the dynamics of open quantum systems. The different unravelings correspond to different choices of squeezed coherent states, reflecting different measurement schemes
Externí odkaz:
http://arxiv.org/abs/1710.08359
Autor:
Guevara, Ivonne, Viviescas, Carlos
Publikováno v:
Phys. Rev. A 90, 012338 (2014)
We present a comprehensive implementation of the quantum trajectory theory for the description of the entanglement dynamics in a Markovian open quantum system made of two qubits. We introduce the average concurrence to characterize the entanglement i
Externí odkaz:
http://arxiv.org/abs/1404.1959
Publikováno v:
Physical Review A 86, 042325 (2012)
We present a novel approach to the study of entanglement decay, which focuses on collective properties. As an example, we investigate the entanglement decay of a two-qubit system, produced by local identical reservoirs acting on the qubits, for three
Externí odkaz:
http://arxiv.org/abs/1210.5645
A key lesson of the decoherence program is that information flowing out from an open system is stored in the quantum state of the surroundings. Simultaneously, quantum measurement theory shows that the evolution of any open system when its environmen
Externí odkaz:
http://arxiv.org/abs/1201.5625
Publikováno v:
Phys. Rev. Lett. 105, 210502 (2010)
We use quantum diffusive trajectories to prove that the time evolution of two-qubit entanglement under spontaneous emission can be fully characterized by optimal continuous monitoring. We analytically determine this optimal unraveling and derive a de
Externí odkaz:
http://arxiv.org/abs/1006.1452
Autor:
Carvalho, André R. R., Busse, Marc, Brodier, Olivier, Viviescas, Carlos, Buchleitner, Andreas
We show that the time evolution of entanglement under incoherent environment coupling can be faithfully recovered by monitoring the system according to a suitable measurement scheme.
Comment: 4 pages, 4 figures
Comment: 4 pages, 4 figures
Externí odkaz:
http://arxiv.org/abs/quant-ph/0510006
Publikováno v:
Phys. Rev. Lett. 96, 070403 (2006)
Propagation of the Wigner function is studied on two levels of semiclassical propagation, one based on the van-Vleck propagator, the other on phase-space path integration. Leading quantum corrections to the classical Liouville propagator take the for
Externí odkaz:
http://arxiv.org/abs/quant-ph/0508057
Publikováno v:
J. Opt. B: Quantum Semiclass. Opt. 6, 211 (2004)
A recently developed technique for the system--and--bath quantization of open optical cavities is applied to three resonator geometries: A one dimensional dielectric, a Fabry--Perot resonator, and a dielectric disk. The system--and--bath Hamiltonian
Externí odkaz:
http://arxiv.org/abs/quant-ph/0310085