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Dissipative quantum metrology in manybody systems of identical particles

Benatti, F ; Alipour, S ; Rezakhani, A T

New journal of physics, 2014-01, Vol.16 (1), p.15023-13 [Periódico revisado por pares]

Bristol: IOP Publishing

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  • Título:
    Dissipative quantum metrology in manybody systems of identical particles
  • Autor: Benatti, F ; Alipour, S ; Rezakhani, A T
  • Assuntos: Dissipation ; Dynamic tests ; Dynamical systems ; Dynamics ; Entanglement ; Metrology ; Parameter estimation ; Physical properties ; Physics ; Quantum entanglement ; Quantum theory ; Shot ; Tasks
  • É parte de: New journal of physics, 2014-01, Vol.16 (1), p.15023-13
  • Notas: Deutsche Physikalische Gesellschaft
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  • Descrição: Estimation of physical parameters is essential in almost any part of science and technology. The enhancement of performance in this task (e.g. beating the standard classical shot-noise limit) using available physical resources is a major goal in metrology. Quantum metrology in closed systems has indicated that entanglement in such systems may be a useful resource. However, whether in open quantum systems such enhancements may still show up is not yet fully understood. Here, we consider a dissipative (open) quantum system of identical particles in which a parameter of the open dynamics itself is to be estimated. We employ a recently developed dissipative quantum metrology framework, and investigate whether the entanglement produced in the course of the dissipative dynamics may help the estimation task. Specifically, we show that, even in a Markovian dynamics in which states become less distinguishable in time, at small enough times the entanglement generated by the dynamics may offer some advantage over the classical shot-noise limit.
  • Editor: Bristol: IOP Publishing
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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