Enhancing precision of atomic clocks by tuning disorder in accessories
arXiv:2212.08523 · doi:10.1103/PhysRevA.110.012620
Abstract
We find that a quantum device having an accessory involving precision measurement can have an enhancement of its metrological precision in estimating an unknown parameter of the quantum system by insertion of glassy disorder, accidental or engineered. We clearly mention how an unbiased estimator can also be identified in a disordered situation, and how the precision thereof can be bounded by the quantum Cr{á}mer-Rao inequality. We compare the Fisher information-based lower bound of the minimum standard deviation of an unbiased estimator, in presence of glassy disorder in the system, with the same of an ideal, viz. disorder-free, situation. The phenomenon can boost the efficiency of certain measuring devices, such as atomic clocks. The precision of these clocks, when measuring time, hinges on the precise determination of the frequency of a two-level atom. In cases where impurities are present in the atom, and can be modeled as a disorder parameter, it is possible for the measurement of frequency to be more accurate than in an ideal, disorder-free scenario. Moreover, disorder insertion can reduce the requirement of entanglement content of the initial probes, which are copies of two-qubit states, along with providing a disorder-induced enhancement.
17 pages, 6 figures, presentation bettered, realization of the disorder model in physical systems added
References in corpus (45)
- Entanglement detection
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Beating the Standard Quantum Limit with Four Entangled Photons
- Optimal Quantum Phase Estimation
- Ultra-stable optical clock with two cold-atom ensembles
- Using entanglement against noise in quantum metrology
- Anderson localization in Bose-Einstein condensates
- Optimal quantum estimation of loss in bosonic channels
- Ultracold Bose Gases in 1D Disorder: From Lifshits Glass to Bose-Einstein Condensate
- Quantum Metrological Limits via a Variational Approach
- Qubit metrology and decoherence
- Phase estimation without a priori knowledge in the presence of loss
- In situ thermometry of a cold Fermi gas via dephasing impurities
- Entanglement, avoided crossings and quantum chaos in an Ising model with a tilted magnetic field
- Order from Disorder in Graphene Quantum Hall Ferromagnet
- Topological protection, disorder, and interactions: Survival at the surface of 3D topological superconductors
- Entanglement Across a Transition to Quantum Chaos
- Sub-nanotesla magnetometry with a fibre-coupled diamond sensor
- Nonexponential quantum decay under environmental decoherence
- Quantum Chaos, Delocalization, and Entanglement in Disordered Heisenberg Models
- Factorization and Criticality in the Anisotropic XY Chain via Correlations
- Continuous-variable quantum probes for structured environments
- Probe incompatibility in multiparameter noisy quantum metrology
- Noisy quantum metrology with the assistance of indefinite causal order
- Disorder-Induced Order in Two-Component Bose-Einstein Condensates
- Quantum metrology with imperfect measurements
- Anti-Zeno Effect for Quantum Transport in Disordered Systems
- Quantum probing beyond pure dephasing
- Interplay of Topological Order and Spin Glassiness in the Toric Code under Random Magnetic Fields
- Quantum parameter estimation in a dissipative environment
- Multiparameter quantum estimation under dephasing noise
- Quantum parameter estimation on coherently superposed noisy channels
- Quantum sensing of open systems: Estimation of damping constants and temperature
- Enhancing the Detection of Natural Thermal Entanglement with Disorder
- Disordered one-dimensional Bose-Fermi mixtures: The Bose-Fermi glass
- Improving resolution-sensitivity trade off in sub-shot noise imaging
- Designing Robust Quantum Refrigerators in Disordered Spin Models
- Competing impurities and reentrant magnetism in La(2-x)Sr(x)Cu(1-z)Zn(z)O(4) revisited. The role of the Dzyaloshinskii-Moriya and XY anisotropies
- Quantum frequency estimation with conditional states of continuously monitored independent dephasing channels
- Quantum metrology with precision reaching beyond- scaling through -probe entanglement generating interactions
- Pair localization in dipolar systems with tunable positional disorder
- Restoring metrological quantum advantage of measurement precision in noisy scenario
- Effects of local decoherence on quantum critical metrology
- Matter-wave interferometers with trapped strongly interacting Feshbach molecules
- Gaussian quantum metrology in a dissipative environment