Bath-Induced Correlations Enhance Thermometry Precision at Low Temperatures

• URL: http://arxiv.org/abs/2001.11812v3
• Date: Mon, 31 Jan 2022 12:20:59 GMT
• Title: Bath-Induced Correlations Enhance Thermometry Precision at Low Temperatures
• Authors: Guim Planella, Marina F.B. Cenni, Antonio Acin, and Mohammad Mehboudi
• Abstract summary: We study the role of bath-induced correlations in temperature estimation of cold bosonic baths. Although classical, bath-induced correlations can lead to significant enhancement of precision for thermometry.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study the role of bath-induced correlations in temperature estimation of cold bosonic baths. Our protocol includes multiple probes, that are not interacting, nor are they initially correlated to each other. They interact with a bosonic sample and reach a nonthermal steady state, which is measured to estimate the temperature of the sample. It is well known that in the steady state such noninteracting probes may get correlated to each other and even entangled. Nonetheless, the impact of these correlations in metrology has not been deeply investigated yet. Here, we examine their role for thermometry of cold bosonic gases and show that, although being classical, bath-induced correlations can lead to significant enhancement of precision for thermometry. The improvement is especially important at low temperatures, where attaining high precision thermometry is particularly demanding. The proposed thermometry scheme does not require any precise dynamical control of the probes and tuning the parameters and is robust to noise in initial preparation, as it is built upon the steady state generated by the natural dissipative dynamics of the system. Therefore, our results put forward new possibilities in thermometry at low temperatures, of relevance, for instance, in cold gases and Bose-Einstein condensates.

Related papers

• Achieving Heisenberg scaling in low-temperature quantum thermometry [12.08205328571395]
  Heisenberg scaling in low-temperature regime can be achieved with only a $pi/2$ rotation of the measurement axis. In contrast to the paradigm of independent thermometers, our proposed scheme demonstrates a significant enhancement in precision for low-temperature measurement.
  arXiv  Detail & Related papers  (2024-07-08T09:14:49Z)
• Thermometry by correlated dephasing of impurities in a 1D Fermi gas [0.0]
  We investigate the pure dephasing dynamics of two static impurity qubits embedded within a common Fermi gas. We show that the impurities become correlated via retarded interactions of the Ruderman-Kittel-Kasuya-Yosida type. These correlations can provide a metrological advantage, enhancing the sensitivity of the two-qubit thermometer beyond that of two independent impurities.
  arXiv  Detail & Related papers  (2023-07-19T16:55:35Z)
• Nonlocal thermoelectric detection of interaction and correlations in edge states [62.997667081978825]
  We propose the nonlocal thermoelectric response as a direct indicator of the presence of interactions, nonthermal states and the effect of correlations. A setup with two controllable quantum point contacts allows thermoelectricity to monitor the interacting system thermalisation.
  arXiv  Detail & Related papers  (2023-07-18T16:28:59Z)
• Uninformed Bayesian Quantum Thermometry [0.0]
  We study the Bayesian approach to thermometry with no prior knowledge about the expected temperature scale. We propose two new estimators based on an optimization of relative deviations.
  arXiv  Detail & Related papers  (2021-08-16T11:39:01Z)
• Uhlmann Fidelity and Fidelity Susceptibility for Integrable Spin Chains at Finite Temperature: Exact Results [68.8204255655161]
  We show that the proper inclusion of the odd parity subspace leads to the enhancement of maximal fidelity susceptibility in the intermediate range of temperatures. The correct low-temperature behavior is captured by an approximation involving the two lowest many-body energy eigenstates.
  arXiv  Detail & Related papers  (2021-05-11T14:08:02Z)
• Role of topology in determining the precision of a finite thermometer [58.720142291102135]
  We find that low connectivity is a resource to build precise thermometers working at low temperatures. We compare the precision achievable by position measurement to the optimal one, which itself corresponds to energy measurement.
  arXiv  Detail & Related papers  (2021-04-21T17:19:42Z)
• Taking the temperature of a pure quantum state [55.41644538483948]
  Temperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research. We propose a scheme to measure the temperature of such pure states through quantum interference.
  arXiv  Detail & Related papers  (2021-03-30T18:18:37Z)
• Adiabatic Sensing Technique for Optimal Temperature Estimation using Trapped Ions [64.31011847952006]
  We propose an adiabatic method for optimal phonon temperature estimation using trapped ions. The relevant information of the phonon thermal distributions can be transferred to the collective spin-degree of freedom. We show that each of the thermal state probabilities is adiabatically mapped onto the respective collective spin-excitation configuration.
  arXiv  Detail & Related papers  (2020-12-16T12:58:08Z)
• Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations [77.34726150561087]
  The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems. Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations. Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
  arXiv  Detail & Related papers  (2020-07-20T18:00:02Z)
• In situ thermometry of a cold Fermi gas via dephasing impurities [0.0]
  We show that the temperature of a non-interacting Fermi gas can be accurately inferred from the non-equilibrium dynamics of impurities immersed within it. We also discover an intriguing trade-off between measurement time and thermometric precision that is controlled by the impurity-gas coupling.
  arXiv  Detail & Related papers  (2020-04-06T18:02:51Z)
• Magnon-Phonon Quantum Correlation Thermometry [0.0]
  A large fraction of quantum science and technology requires low-temperature environments such as those afforded by dilution refrigerators. Here, we theoretically propose a primary thermometer based on measurement of a hybrid system consisting of phonons coupled via a magnetostrictive interaction to magnons.
  arXiv  Detail & Related papers  (2020-01-29T22:57:51Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.