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Dissipative quantum metrology in manybody systems of identical particles

Benatti, F ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1088/1367-2630/16/1/015023
  3. Abstract:
  4. 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
  5. Keywords:
  6. Dissipative dynamics ; Identical particles ; Many-body systems ; Markovian dynamics ; Open quantum systems ; Physical parameters ; Physical resources ; Science and Technology ; Dynamics ; Measurements ; Parameter estimation ; Quantum electronics ; Quantum optics ; Units of measurement ; Quantum entanglement
  7. Source: New Journal of Physics ; Vol. 16, issue , January , 2014
  8. URL: http://iopscience.iop.org/1367-2630/16/1/015023