Enhancing Gaussian quantum metrology with position-momentum correlations
arXiv:2408.13060 · doi:10.1088/1402-4896/ad9a18
Abstract
Quantum metrology offers significant improvements in several quantum technologies. In this work, we propose a Gaussian quantum metrology protocol assisted by initial position-momentum correlations (PM). We employ a correlated Gaussian wave packet as a probe to examine the dynamics of Quantum Fisher Information (QFI) and purity based on PM correlations to demonstrate how to estimate the PM correlations and, more importantly, to unlock its potential applications such as a resource to enhance quantum thermometry. In the low-temperature regime, we find an improvement in the thermometry of the surrounding environment when the original system exhibits a non-null initial correlation (correlated Gaussian state). In addition, we explore the connection between the loss of purity and the gain in QFI during the process of estimating the effective environment coupling and its effective temperature.
References in corpus (13)
- Individual quantum probes for optimal thermometry
- Quantum metrology in Lipkin-Meshkov-Glick critical systems
- Measurement of damping and temperature: Precision bounds in Gaussian dissipative channels
- Entanglement-enhanced quantum metrology: from standard quantum limit to Heisenberg limit
- Nano-Kelvin thermometry and temperature control: beyond the thermal noise limit
- Phase space formalism for quantum estimation of Gaussian states
- Low-temperature quantum thermometry boosted by coherence generation
- Non-Markovianity of Quantum Brownian Motion
- Exploring quantum thermodynamics with NMR
- Super-Resolution Imaging with Multiparameter Quantum Metrology in Passive Remote Sensing
- Gouy phase and quantum interference with cross-Wigner functions for matter-waves
- The role of position momentum correlations in coherence freezing and purity behavior
- The role of initial system-environment correlations in the accuracies of parameters within spin-spin model
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