Achieving sub-shot-noise sensing at finite temperatures
arXiv:1604.06400 · doi:10.1103/PhysRevA.94.042121
Abstract
We investigate sensing of magnetic fields using quantum spin chains at finite temperature and exploit quantum phase crossovers to improve metrological bounds on the estimation of the chain parameters. In particular, we analyze the spin chain and show that the magnetic sensitivity of this system is dictated by its adiabatic magnetic susceptibility, which scales extensively (linearly) in the number of spins . Next, we introduce an iterative feedforward protocol that actively exploits features of quantum phase crossovers to enable super-extensive scaling of the magnetic sensitivity. Moreover, we provide experimentally realistic observables to saturate the quantum metrological bounds. Finally, we also address magnetic sensing in the Heisenberg spin chain.
8 pages, 4 figures; revised
References in corpus (19)
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice
- Fidelity, dynamic structure factor, and susceptibility in critical phenomena
- Quantum critical scaling of the geometric tensors
- Fisher Information and entanglement of non-Gaussian spin states
- Generalized Limits for Single-Parameter Quantum Estimation
- Quantum criticality as a resource for quantum estimation
- Individual quantum probes for optimal thermometry
- Quantum Metrology: Dynamics vs. Entanglement
- Mixed-state fidelity and quantum criticality at finite temperature
- Quantum Non-Demolition Detection of Strongly Correlated Systems
- Optimal quantum estimation in spin systems at criticality
- Atomic spin chain realization of a model for quantum criticality
- Quantum metrology in Lipkin-Meshkov-Glick critical systems
- A nonlinear Ramsey interferometer operating beyond the Heisenberg limit
- Nonlinear quantum metrology using coupled nanomechanical resonators
- Multimode entanglement of light and atomic ensembles via off-resonant coherent forward scattering
- Quantum polarization spectroscopy of ultracold spinor gases
- Probing magnetic order in ultracold lattice gases
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- Thermometry in the quantum regime: Recent theoretical progress
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- Nonclassical correlations for quantum metrology in thermal equilibrium
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