Estimating the Fisher information from ARPES in general two-band models

• URL: http://arxiv.org/abs/2608.22511v1
• Date: Sun, 23 Aug 2026 17:13:14 GMT
• Title: Estimating the Fisher information from ARPES in general two-band models
• Abstract summary: We propose a scheme for measuring the quantum Fisher information with respect to any parameter in a general two-band solid state system.<n>We investigate conditions under which this can be related back to information about the ground state of the material itself changing with system parameters.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The Quantum Fisher information is frequently studied in the fields of quantum sensing and quantum metrology, as it specifies the sensitivity of a sensor through the Crámer-Rao bound, and in condensed matter physics where it relates to the quantum metric. Measuring the quantum Fisher information is therefore of significant current interest. In this work, we propose a scheme for measuring the quantum Fisher information with respect to any parameter in a general two-band solid state system using angle-resolved photoemission spectroscopy with carefully tuned incidence angles and light polarization. We investigate conditions under which this can be related back to information about the ground state of the material itself changing with system parameters.

Related papers

• Characterizing Fisher information of quantum measurement [0.0]
  Informationally complete measurements form the foundation of universal quantum state reconstruction.<n>Quantum parameter estimation is based on the local structure of the manifold of quantum states.
  arXiv  Detail & Related papers  (2025-12-17T13:22:31Z)
• Distinct Critical Scaling of Quantum Fisher Information in a Quantum Rabi Triangle System [4.37036011103316]
  In this work, we investigate the criticality-enhanced sensing in a quantum Rabi triangle system.<n>We observe that the quantum Fisher information shows divergent scaling near different quantum phase transition points.<n>We propose a measurement scheme of the average photon number and the quantum Cram'er-Rao bound can be saturated.
  arXiv  Detail & Related papers  (2025-11-03T07:57:51Z)
• Coherence-Mediated Quantum Thermometry in a Hybrid Circuit-QED Architecture [39.391428786947685]
  We analyze a hybrid circuit quantum electrodynamics architecture in which a superconducting qubit is dispersively coupled to two bosonic modes.<n>We show that the qubit serves as a sensitive readout of the probe mode, mapping the interference between thermal and coherent photon-number fluctuations onto measurable dephasing.<n>We derive analytic expressions for the qubit coherence envelope, compute the quantum Fisher information for temperature estimation, and demonstrate numerically that the presence of a coherent reference amplifies the qubit's sensitivity to small changes in thermal photon occupancy.
  arXiv  Detail & Related papers  (2025-10-18T03:06:40Z)
• Quantum metrology through spectral measurements in quantum optics [45.88028371034407]
  Continuously monitored quantum systems are emerging as promising platforms for quantum metrology.<n>A central challenge is to identify measurement strategies that optimally extract information about unknown parameters encoded in the quantum state of emitted radiation.
  arXiv  Detail & Related papers  (2025-09-04T15:14:16Z)
• Quantum Fisher information as a witness of non-Markovianity and criticality in the spin-boson model [0.0]
  We use the spin-boson model to calculate both static and dynamical quantum Fisher information matrix elements.<n>We show that the coupling-coupling matrix elements relative to the ground state of the Hamiltonian are linked to the entanglement growth and signal the Berezinskii-Kosterlitz-Thouless quantum phase transition.<n>We demonstrate that the time-dependent matrix elements can reveal non-Markovian effects as well as the transition from the coherent to incoherent regime at the Toulouse point, remaining robust under pure dephasing noise.
  arXiv  Detail & Related papers  (2025-08-22T14:25:09Z)
• Weak convexity of Fisher information matrix and superresolved localization of blinking sources of light [41.94295877935867]
  A group of techniques known by the general name of single-molecule localization microscopy reaches a nanometer-scale spatial resolution.<n>We show that the advantage in resolution provided by making the emitters blink is a consequence of the fundamental property of Fisher information, its convexity.
  arXiv  Detail & Related papers  (2025-01-24T17:50:36Z)
• Combining critical and quantum metrology [0.0]
  We introduce an approach combining two methodologies into a unified protocol applicable to closed and driven-dissipative systems. We provide analytical expressions for the quantum and classical Fisher information in such a setup, elucidating as well a straightforward measurement approach. We showcase these results by focusing on the squeezing Hamiltonian, which characterizes the thermodynamic limit of Dicke and Lipkin-Meshkov-Glick Hamiltonians.
  arXiv  Detail & Related papers  (2023-11-28T04:21:39Z)
• Probing cosmic string spacetime through parameter estimation [2.2945727928675734]
  We estimate the deficit angle parameter by calculating its quantum Fisher information(QFI) It is found that the quantum Fisher information depends on the deficit angle, evolution time, detector initial state, polarization direction, and its position. Our results show that for different polarization cases the QFIs have different behaviors and different orders of magnitude, which may shed light on the exploration of cosmic string spacetime.
  arXiv  Detail & Related papers  (2022-08-10T13:55:09Z)
• Tracing Information Flow from Open Quantum Systems [52.77024349608834]
  We use photons in a waveguide array to implement a quantum simulation of the coupling of a qubit with a low-dimensional discrete environment. Using the trace distance between quantum states as a measure of information, we analyze different types of information transfer.
  arXiv  Detail & Related papers  (2021-03-22T16:38:31Z)
• Quantum information spreading in a disordered quantum walk [50.591267188664666]
  We design a quantum probing protocol using Quantum Walks to investigate the Quantum Information spreading pattern. We focus on the coherent static and dynamic disorder to investigate anomalous and classical transport. Our results show that a Quantum Walk can be considered as a readout device of information about defects and perturbations occurring in complex networks.
  arXiv  Detail & Related papers  (2020-10-20T20:03:19Z)
• In and out of equilibrium quantum metrology with mean-field quantum criticality [68.8204255655161]
  We study the influence that collective transition phenomena have on quantum metrological protocols. The single spherical quantum spin (SQS) serves as stereotypical toy model that allows analytical insights on a mean-field level.
  arXiv  Detail & Related papers  (2020-01-09T19:20:42Z)

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.