Quantum Parameter Estimation in the Unruh-DeWitt detector model
arXiv:1510.06515 · doi:10.1016/j.aop.2016.04.021
Abstract
Relativistic effects on the precision of quantum metrology for particle detectors, such as two-level atoms are studied. The quantum Fisher information is used to estimate the phase sensitivity of atoms in non-inertial motions or in gravitational fields. The Unruh-DeWitt model is applicable to the investigation of the dynamics of a uniformly accelerated atom weakly coupled to a massless scalar vacuum field. When a measuring device is in the same relativistic motion as the atom, the dynamical behavior of quantum Fisher information as a function of Rindler proper time are obtained. It is found out that monotonic decrease in phase sensitivity is characteristic of dynamics of relativistic quantum estimation. To improve relativistic quantum metrology, we reasonably take into account two reflecting plane boundaries perpendicular to each other.
13 pages, 4 figures
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Cited by in corpus (5)
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- Fisher information as a probe of spacetime structure: Relativistic quantum metrology in (A)dS
- Quantum fluctuation of entanglement for accelerated two-level detectors
- Quantum Parameter Estimation for Detectors in Constantly Accelerated Motion