An inequality for relativistic local quantum measurements

• URL: http://arxiv.org/abs/2509.11599v1
• Date: Mon, 15 Sep 2025 05:29:22 GMT
• Title: An inequality for relativistic local quantum measurements
• Authors: Riccardo Falcone, Claudio Conti,
• Abstract summary: We investigate the trade-off between vacuum insensitivity and sensitivity to excitations in finite-size detectors.<n>We derive an upper bound on the detectability of vacuum excitation, given a small but nonzero probability of false positives in the vacuum state.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate the trade-off between vacuum insensitivity and sensitivity to excitations in finite-size detectors, taking measurement locality as a fundamental constraint. We derive an upper bound on the detectability of vacuum excitation, given a small but nonzero probability of false positives in the vacuum state. The result is independent of the specific details of the measurement or the underlying physical mechanisms of the detector and relies only on the assumption of locality. Experimental confirmation or violation of the inequality would provide a test of the axioms of algebraic quantum field theory, offer new insights into the measurement problem in relativistic quantum physics, and establish a fundamental technological limit in local particle detection.

Related papers

• Realistic prospects for testing a relativistic local quantum measurement inequality [0.0]
  We investigate a relativistic local quantum measurement inequality that quantifies the trade-off between vacuum insensitivity and responsiveness to excitations for finite-size detectors.<n>Building on the Reeh--Schlieder approximation for coherent states, we derive an explicit and practically applicable bound for arbitrary coherent states.
  arXiv  Detail & Related papers  (2026-01-15T12:58:23Z)
• Contextuality from the vacuum [0.0]
  We investigate the harvesting of contextuality from the vacuum of a quantum field using Unruh-DeWitt detectors.<n>We show that interactions with the field can endow initially non-contextual detectors with contextuality with respect to Heisenberg-Weyl measurements.
  arXiv  Detail & Related papers  (2025-08-20T18:41:20Z)
• The Darkfield Approach to Measuring Vacuum Birefringence and Light-by-Light Couplings -- A Proof-of-Principle Experiment [47.269836510794505]
  nonlinear vacuum response is very small even when probing a tightly focused high-intensity laser field with XFEL radiation.<n>We present the results of a proof-of-principle experiment validating this approach at the High Energy Density scientific instrument of the European X-Ray Free Electron Laser.
  arXiv  Detail & Related papers  (2025-06-13T10:23:55Z)
• Entanglement and purity can help to detect systematic experimental errors [28.632544413532923]
  We develop a direct and efficient method to detect systematic errors in quantum experiments.<n>Our results show that entanglement as well as quantum states with a high purity can help to identify systematic errors.
  arXiv  Detail & Related papers  (2025-03-12T15:05:06Z)
• Measuring Decoherence Due to Quantum Vacuum Fluctuations [0.0]
  The interaction of a particle with vacuum fluctuations can lead to irreversible decoherence if it were possible to switch on and off the particle charge suddenly.<n>We compute the leading order decoherence effect for such a scenario and propose an experimental setup for its detection.
  arXiv  Detail & Related papers  (2025-01-29T19:00:04Z)
• Testing trajectory-based determinism via time probability distributions [41.99844472131922]
  We introduce a prescription for constructing an arrival-time probability distribution within generic trajectory-equipped theories.<n>We derive a conditional probability distribution that is unreachable by quantum mechanics.<n>Our results can be tested experimentally, thereby assessing the validity of trajectory-based determinism.
  arXiv  Detail & Related papers  (2024-04-15T11:36:38Z)
• Relativistic Quantum Fields Are Universal Entanglement Embezzlers [41.94295877935867]
  Embezzlement of entanglement refers to the counterintuitive possibility of extracting entangled quantum states from a reference state of an auxiliary system.<n>We uncover a deep connection between the operational task of embezzling entanglement and the mathematical classification of von Neumann algebras.
  arXiv  Detail & Related papers  (2024-01-14T13:58:32Z)
• Enhanced Entanglement in the Measurement-Altered Quantum Ising Chain [43.80709028066351]
  Local quantum measurements do not simply disentangle degrees of freedom, but may actually strengthen the entanglement in the system.<n>This paper explores how a finite density of local measurement modifies a given state's entanglement structure.
  arXiv  Detail & Related papers  (2023-10-04T09:51:00Z)
• Relativistic time-of-arrival measurements: predictions, post-selection and causality problem [0.0]
  We analyze time-of-arrival probability distributions for relativistic particles in the context of quantum field theory (QFT) We show that QFT leads to a unique prediction, modulo post-selection, that incorporates properties of the apparatus into the initial state. We discuss possible ways to restore causality, and we argue that this may not be possible in measurement models that involve switching the field-apparatus coupling on and off.
  arXiv  Detail & Related papers  (2022-10-11T16:24:39Z)
• Sensing of magnetic field effects in radical-pair reactions using a quantum sensor [50.591267188664666]
  Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades. We employ elaborate and realistic models of radical-pairs, considering its coupling to the local spin environment and the sensor. For two model systems, we derive signals of MFE detectable even in the weak coupling regime between radical-pair and NV quantum sensor.
  arXiv  Detail & Related papers  (2022-09-28T12:56:15Z)
• Probing the symmetry breaking of a light--matter system by an ancillary qubit [50.591267188664666]
  Hybrid quantum systems in the ultrastrong, and even more in the deep-strong, coupling regimes can exhibit exotic physical phenomena. We experimentally observe the parity symmetry breaking of an ancillary Xmon artificial atom induced by the field of a lumped-element superconducting resonator. This result opens a way to experimentally explore the novel quantum-vacuum effects emerging in the deep-strong coupling regime.
  arXiv  Detail & Related papers  (2022-09-13T06:14:08Z)
• Detectable Signature of Quantum Friction on a Sliding Particle in Vacuum [58.720142291102135]
  We show traces of quantum friction in the degradation of the quantum coherence of a particle. We propose to use the accumulated geometric phase acquired by a particle as a quantum friction sensor. The experimentally viable scheme presented can spark renewed optimism for the detection of non-contact friction.
  arXiv  Detail & Related papers  (2021-03-22T16:25:27Z)
• Entanglement detection in quantum many-body systems using entropic uncertainty relations [0.0]
  We study experimentally accessible lower bounds on entanglement measures based on entropic uncertainty relations. We derive an improved entanglement bound for bipartite systems, which requires measuring joint probability distributions in only two different measurement settings per subsystem.
  arXiv  Detail & Related papers  (2021-01-21T20:50:11Z)
• Enhanced decoherence for a neutral particle sliding on a metallic surface in vacuum [68.8204255655161]
  We show that non-contact friction enhances the decoherence of the moving atom. We suggest that measuring decoherence times through velocity dependence of coherences could indirectly demonstrate the existence of quantum friction.
  arXiv  Detail & Related papers  (2020-11-06T17:34:35Z)

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.