The Boundary Time Crystal as a light source for quantum enhanced sensing beyond the Heisenberg Limit

• URL: http://arxiv.org/abs/2511.23416v1
• Date: Fri, 28 Nov 2025 18:12:09 GMT
• Title: The Boundary Time Crystal as a light source for quantum enhanced sensing beyond the Heisenberg Limit
• Abstract summary: We exploit a driven-dissipative many-body open quantum system as a light source.<n>We show that temporal correlations of such output fields benefit the sensitivity of measurement protocols.<n>This scaling can be partially harnessed by a protocol, in which the phase shifted light field is guided into an auxiliary replica system.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Modern precision measurements, such as interferometry for detecting gravitational waves, rely on the estimation of optical phases encoded in light fields. Here, we propose to exploit the collectively enhanced output field of a driven-dissipative many-body open quantum system as a light source in order to improve the precision of estimating optical phases. Pronounced temporal correlations of such output fields benefit the sensitivity of measurement protocols, which we show theoretically by employing a boundary time crystal as a light source. The fundamental bound on the precision of such estimation shows scaling with system size that surpasses the Heisenberg limit and obeys the standard quantum limit in the measurement time. This scaling can be partially harnessed by a protocol, in which the phase shifted light field is guided into an auxiliary replica system, which serves as a detector that is sensitive to non-trivial temporal correlations of the light.

Related papers

• Learned Diffractive Optics for Quantum-Optimal Inference [42.15593888902416]
  Quantum mechanics sets the ultimate bounds on photon-limited sensing.<n>This is particularly the case for visual sensing problems, where the goal is to infer features of a distant object based on the spatial structure of the light field it emits or reflects.<n>Here, we apply learned diffractive optics to state discrimination and parameter estimation of coherent and diffraction-limited incoherent light fields under a restricted photon budget.
  arXiv  Detail & Related papers  (2026-09-07T21:52:13Z)
• Attosecond metrology of bright quantum light [0.0]
  We show that attosecond streaking measurement of bright quantum light is sensitive to quantum fluctuations of the optical field on the attosecond timescale.<n>We provide a certification method that can measure quantum squeezing below the shot noise limit, thereby overcoming the problem of tomographically measuring bright quantum light.
  arXiv  Detail & Related papers  (2026-07-07T15:28:46Z)
• Quantum-limited detection of arrival time and carrier frequency of time-dependent signals [0.0]
  Quantum mechanics imposes fundamental limits on the simultaneous determination of quantities.<n>We show that when detection is restricted to finite time windows, the problem is naturally described by a quantum rotor.<n>We propose an optimal detection scheme that saturates these fundamental limits.
  arXiv  Detail & Related papers  (2026-02-24T14:41:03Z)
• Ultrafast quantum optics with attosecond control [0.0]
  We introduce a quantum light field squeezer (QLFS) that enables the generation and attosecond control of ultrafast broadband squeezed light.<n>Our approach overcomes conventional broadband phase-matching limits, producing intensity- and phase-squeezed states.<n>These results extend the generation, control, and effective phase-space representation of squeezed light into the ultrafast and attosecond regime.
  arXiv  Detail & Related papers  (2026-01-13T15:47:48Z)
• Information-Scrambling-Enhanced Quantum Sensing Beyond the Standard Quantum Limit [24.972499920814034]
  We experimentally demonstrate a scalable, scrambling-enhanced quantum sensing protocol, implemented on a cross-shaped superconducting quantum processor.<n>By harnessing quantum information scrambling, the protocol converts local interactions into delocalized metrologically useful correlations, enabling robust signal amplification.<n>This work demonstrates a readily scalable path toward practical quantum sensing advantages with prevalent experimental platforms.
  arXiv  Detail & Related papers  (2025-12-24T13:05:34Z)
• Time-domain field correlation measurements enable tomography of highly multimode quantum states of light [0.0]
  We propose a tomography scheme based on time-domain quadrature correlation measurements.<n>We show that the number of reconstructable modes increases with the number of time delays used.<n>We show how thermalisation of the quantum state during detection leads to the requirement of correlation measurements.
  arXiv  Detail & Related papers  (2025-06-12T08:35:36Z)
• Fieldoscopy at the Quantum Limit [0.0]
  We observe a clear transition from classical to quantum nature of light.<n>We reach unprecedented yoctojoule-level sensitivity and a dynamic range exceeding 90 decibels.
  arXiv  Detail & Related papers  (2025-04-17T17:38:46Z)
• Quantum-amplified global-phase spectroscopy on an optical clock transition [4.4049570485299885]
  We adapt the holonomic quantum-gate concept to develop a novel Rabi-type "global-phase spectroscopy" (GPS)<n>We are able to demonstrate quantum-amplified time-reversal spectroscopy in an OLC that achieves 2.4(5) dB metrological gain without subtracting the laser noise.<n>Our technique is not limited by measurement resolution, scales easily owing to the global nature of entangling interaction, and exhibits high resilience to typical experimental imperfections.
  arXiv  Detail & Related papers  (2025-04-02T17:18:18Z)
• Quantum extreme learning machines for photonic entanglement witnessing [30.432877421232842]
  Quantum extreme learning machines (QELMs) embody a powerful alternative for witnessing quantum entanglement.<n>We implement a photonic QELM that leverages the orbital angular momentum of photon pairs as an ancillary degree of freedom.<n>Unlike conventional methods, our approach does not require fine-tuning, precise calibration, or refined knowledge of the apparatus.
  arXiv  Detail & Related papers  (2025-02-25T16:55:35Z)
• Photon Counting Interferometry to Detect Geontropic Space-Time Fluctuations with GQuEST [31.114245664719455]
  The GQuEST experiment uses tabletop-scale Michelson laser interferometers to probe for fluctuations in space-time.<n>We present a practicable interferometer design featuring a novel photon counting readout method that provides unprecedented sensitivity.
  arXiv  Detail & Related papers  (2024-04-11T07:38:36Z)
• High-dimensional quantum correlation measurements with an adaptively gated hybrid single-photon camera [58.720142291102135]
  We propose an adaptively-gated hybrid intensified camera (HIC) that combines a high spatial resolution sensor and a high temporal resolution detector. With a spatial resolution of nearly 9 megapixels and nanosecond temporal resolution, this system allows for the realization of previously infeasible quantum optics experiments.
  arXiv  Detail & Related papers  (2023-05-25T16:59:27Z)
• Integrated Quantum Optical Phase Sensor [48.7576911714538]
  We present a photonic integrated circuit fabricated in thin-film lithium niobate. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. We anticipate that on-chip photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
  arXiv  Detail & Related papers  (2022-12-19T18:46:33Z)
• Spacetime effects on wavepackets of coherent light [24.587462517914865]
  We introduce an operational way to distinguish between the overall shift in the pulse wavepacket and its genuine deformation after propagation. We then apply our technique to quantum states of photons that are coherent in the frequency degree of freedom. We find that the quantum coherence initially present can enhance the deformation induced by propagation in a curved background.
  arXiv  Detail & Related papers  (2021-06-23T14:20:19Z)
• Optical-domain spectral super-resolution via a quantum-memory-based time-frequency processor [0.0]
  We exploit the full spectral information of the optical field in order to beat the Rayleigh limit in spectroscopy. We employ an optical quantum memory with spin-wave storage and an embedded processing capability to implement a time-inversion interferometer for input light. Our tailored measurement achieves a resolution of 15 kHz and requires 20 times less photons than a corresponding Rayleigh-limited conventional method.
  arXiv  Detail & Related papers  (2021-06-08T15:35:41Z)

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.