Optimal Displacement Sensing with Spin-Dependent Squeezed States

• URL: http://arxiv.org/abs/2510.25870v1
• Date: Wed, 29 Oct 2025 18:11:52 GMT
• Title: Optimal Displacement Sensing with Spin-Dependent Squeezed States
• Authors: Liam J. Bond, Christophe H. Valahu, Athreya Shankar, Ting Rei Tan, Arghavan Safavi-Naini,
• Abstract summary: We propose novel many-body displacement sensing schemes that use spin-dependent squeezed (SDS) states.<n>We show that SDS states are emphoptimal, i.e. their quantum Cram'er-Rao bound saturates the Heisenberg limit.<n>The potential applications of our sensing protocols range from measuring single-photon scattering to searches for dark matter.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Displacement sensing is a fundamental task in metrology. However, the development of quantum-enhanced sensors that fully utilize the available degrees of freedom in many-body quantum systems remains an outstanding challenge. We propose novel many-body displacement sensing schemes that use spin-dependent squeezed (SDS) states -- hybrid spin-boson states whose bosonic squeezed quadrature is conditioned on an auxiliary spin. We prove that SDS states are \emph{optimal}, i.e. their quantum Cram\'{e}r-Rao bound saturates the Heisenberg limit. We propose explicit measurement sequences that can be readily implemented in systems such as trapped ions. We also introduce a scalable state-preparation protocol and numerically demonstrate the preparation of $8.7$~dB of spin-dependent squeezing $15$ times faster than the standard approach using second-order sidebands in trapped ions. The potential applications of our sensing protocols range from measuring single-photon scattering to searches for dark matter.

Related papers

• Precision limit under weak-coupling with ancillary qubit [3.687781331131875]
  We propose a measurement-based quantum metrology protocol in a composite model.<n>A spin ensemble is coupled to an ancillary two-level system (qubit) with a general Heisenberg XXZ interaction.<n>We suggest that the unconditional measurement on qubit could become an efficient resource to replace Greenberger-Horne-Zeilinger-like states.
  arXiv  Detail & Related papers  (2026-01-21T06:01:51Z)
• Generation of spin-squeezed states using dipole-coupled spins [7.518737578485048]
  The sensitivity of quantum sensing depends on how precisely spin observables can be determined in the measurement.<n>The use of a spin-squeezed state in a quantum sensor can reduce the uncertainty below the standard quantum limit when combined with an appropriate measurement procedure.
  arXiv  Detail & Related papers  (2025-11-19T23:45:01Z)
• An integrated neural wavefunction solver for spinful Fermi systems [41.99844472131922]
  We present an approach to solving the ground state of Fermi systems that contain spin or other discrete degrees of freedom in addition to continuous coordinates.<n>A transformer achieves both continuous position and discrete spin as inputs universal approximation to spinful generalized orbitals.<n>We validate the method on a range of two-dimensional material problems.
  arXiv  Detail & Related papers  (2025-10-21T13:20:31Z)
• Quantum sensing of displacements with stabilized GKP states [41.94295877935867]
  We show how protocols for the stabilization of Gottesman-Kitaev-Preskill states can be used for the estimation of two-quadrature displacement sensing.<n>Thanks to the stabilization, this sensor is backaction evading and can function continuously without reset, making it well suited for the detection of itinerant signals.
  arXiv  Detail & Related papers  (2025-06-25T17:18:50Z)
• Optimal phase-insensitive force sensing with non-Gaussian states [0.0]
  We investigate a force-sensing scheme where a physical process completely randomizes the direction of the induced phase-space displacement.<n>We find that $N$-spaced states, where only every $Ntextth$ Fock state occupation is nonzero, approach the achievable sensing bound.<n>We identify these states as maximizing force sensitivity under lossy dynamics and finite system controllability.
  arXiv  Detail & Related papers  (2025-05-27T07:52:06Z)
• Super-Heisenberg scaling of the quantum Fisher information using spin-motion states [0.0]
  We propose a spin-motion state for high-precision quantum metrology using a trapped ion system. We show that the adiabatic evolution creates a spin-squeezed state, which reduces the quantum projective noise to a sub-shot noise limit.
  arXiv  Detail & Related papers  (2024-11-15T11:33:03Z)
• Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation [0.0]
  We generate entangled spin states devoid of the necessity for non-linear spin interactions.<n>The metrological sensitivity of the resulting state surpasses the standard quantum limit.<n>Our findings introduce a novel method for generating large-scale, non-classical, entangled states.
  arXiv  Detail & Related papers  (2024-03-09T16:27:15Z)
• Quantum metrology enhanced by the $XY$ spin interaction in a generalized Tavis-Cummings model [0.0]
  We explore the impact of the many-body effect on estimation precision, quantified by the quantum Fisher information (QFI) We emphasize the indispensable role of the spin anisotropy in achieving the Heisenberg-scaling precision.
  arXiv  Detail & Related papers  (2023-07-30T08:20:26Z)
• Dissipative preparation and stabilization of many-body quantum states in a superconducting qutrit array [55.41644538483948]
  We present and analyze a protocol for driven-dissipatively preparing and stabilizing a manifold of quantum manybody entangled states. We perform theoretical modeling of this platform via pulse-level simulations based on physical features of real devices. Our work shows the capacity of driven-dissipative superconducting cQED systems to host robust and self-corrected quantum manybody states.
  arXiv  Detail & Related papers  (2023-03-21T18:02:47Z)
• Dissipative superradiant spin amplifier for enhanced quantum sensing [0.0]
  We present a dissipative "spin amplification" protocol that allows one to dramatically improve the sensitivity of such schemes. Our method is based on exploiting collective (i.e., superradiant) spin decay. We show that our approach can allow a system with a highly imperfect spin readout to approach $N$ within a factor of two, without needing to change the actual readout mechanism.
  arXiv  Detail & Related papers  (2021-11-30T18:29:10Z)
• Enhanced nonlinear quantum metrology with weakly coupled solitons and particle losses [58.720142291102135]
  We offer an interferometric procedure for phase parameters estimation at the Heisenberg (up to 1/N) and super-Heisenberg scaling levels. The heart of our setup is the novel soliton Josephson Junction (SJJ) system providing the formation of the quantum probe. We illustrate that such states are close to the optimal ones even with moderate losses.
  arXiv  Detail & Related papers  (2021-08-07T09:29:23Z)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• Bose-Einstein condensate soliton qubit states for metrological applications [58.720142291102135]
  We propose novel quantum metrology applications with two soliton qubit states. Phase space analysis, in terms of population imbalance - phase difference variables, is also performed to demonstrate macroscopic quantum self-trapping regimes.
  arXiv  Detail & Related papers  (2020-11-26T09:05:06Z)

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.