Electromagnetic shielding in quantum metrology
arXiv:1504.05278 · doi:10.1103/PhysRevA.91.022120
Abstract
The dynamics of the quantum Fisher information of the parameters of the initial atomic state and atomic transition frequency is studied, in the framework of open quantum systems, for a static polarizable two-level atom coupled in the multipolar scheme to a bath of fluctuating vacuum electromagnetic fields without and with the presence of a reflecting boundary. Our results show that in the case without a boundary, the electromagnetic vacuum fluctuations always cause the quantum Fisher information of the initial parameters and thus the precision limit of parameter estimation to decrease. Remarkably, however, with the presence of a boundary, the quantum Fisher information becomes position and atomic polarization dependent, and as a result, it may be enhanced as compared to that in the case without a boundary and may even be shielded from the influence of the vacuum fluctuations in certain circumstances as if it were a closed system.
arXiv comment16 pages, 3 figures
References in corpus (42)
- Quantum-enhanced measurements: beating the standard quantum limit
- Quantum metrology
- On the Improvement of Frequency Stardards with Quantum Entanglement
- General framework for estimating the ultimate precision limit in noisy quantum-enhanced metrology
- Entanglement, Non-linear Dynamics, and the Heisenberg Limit
- Squeezing and entanglement in a Bose-Einstein condensate
- The elusive Heisenberg limit in quantum enhanced metrology
- Quantum Metrology in Non-Markovian Environments
- Fisher information and multiparticle entanglement
- Optimal Quantum Phase Estimation
- Generalized Limits for Single-Parameter Quantum Estimation
- Environment Induced Entanglement in Markovian Dissipative Dynamics
- Quantum Clock Synchronization Based on Shared Prior Entanglement
- Quantum phase estimation with lossy interferometers
- Fisher information under decoherence in Bloch representation
- Experimental quantum-enhanced estimation of a lossy phase shift
- Quantum Metrology: Dynamics vs. Entanglement
- Optical phase estimation in the presence of phase-diffusion
- Optimal quantum estimation of loss in bosonic channels
- Scaling laws for precision in quantum interferometry and bifurcation landscape of optimal state
- Optimal Quantum Clocks
- Noisy metrology beyond the standard quantum limit
- Exponentially Enhanced Quantum Metrology
- Qubit metrology and decoherence
- Entanglement and sensitivity in precision measurements with states of a fluctuating number of particles
- Phase estimation without a priori knowledge in the presence of loss
- All path-symmetric pure states achieve their maximal phase sensitivity in conventional two-path interferometry
- Optimization of quantum interferometric metrological sensors in the presence of photon loss
- Spontaneous excitation of an accelerated hydrogen atom coupled with electromagnetic vacuum fluctuations
- Lightcone fluctuations in flat spacetimes with nontrivial topology
- Quantum lithography, entanglement and Heisenberg-limited parameter estimation
- Optimal Measurement on Noisy Quantum Systems
- Lightcone fluctuations in quantum gravity and extra dimensions
- Vacuum fluctuations and Brownian motion of a charged test particle near a reflecting boundary
- Optimal parameter estimation of depolarizing channel
- Brownian motion of a charged test particle in vacuum between two conducting plates
- Quantum Lightcone Fluctuations in Compactified Spacetimes
- Parameter estimation with cluster states
- Brownian motion of a charged test particle near a reflecting boundary at finite temperature
- Quantum fluctuations of lightcone in 4-dimensional spacetime with parallel plane boundaries
- Detecting modified vacuum fluctuations due to presence of a boundary by means of the geometric phase
- Brownian motion of a charged test particle driven by vacuum fluctuations near a dielectric half-space
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- Quantum Parameter Estimation for Detectors in Constantly Accelerated Motion
- Velocity effects slightly mitigating the quantumness degradation of an Unruh-DeWitt detector