Gravitational acceleration encoded in Jaynes Cummings exchange frequencies: Quantum Fisher information, readout, and validity conditions

• URL: http://arxiv.org/abs/2607.23324v1
• Date: Sat, 25 Jul 2026 18:33:28 GMT
• Title: Gravitational acceleration encoded in Jaynes Cummings exchange frequencies: Quantum Fisher information, readout, and validity conditions
• Abstract summary: We solve the closed-system carrier dynamics exactly and derive the displaced-frame quantum Fisher information (QFI) of the joint atom-cavity state.<n>This QFI is proportional to the square of the local coupling slope, grows quadratically with interrogation time, and scales linearly with mean photon number.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We derive an effective trapped atom--cavity model in which a constant gravitational acceleration shifts the oscillator equilibrium and changes the local standing-wave coupling, thereby encoding the acceleration in the Jaynes Cummings exchange frequencies. With the atom and motion initially in their ground states and the cavity field initially coherent, we solve the closed-system carrier dynamics exactly and derive the displaced-frame quantum Fisher information (QFI) of the joint atom-cavity state. This QFI is proportional to the square of the local coupling slope, grows quadratically with interrogation time, and scales linearly with mean photon number. At the node, phase-referenced Ramsey detection gives a sign-sensitive estimate of axial acceleration and locally saturates the joint QFI. Away from the node, photon counting and phase-optimized homodyne detection provide cavity readouts when the cavity state carries more QFI than the atomic state. At the off-node operating point studied, Lindblad simulations show that cavity loss produces a finite-time QFI optimum. Lamb Dicke and sideband-suppression conditions control the carrier approximation. In the closed-system benchmark, the carrier-model QFI agrees with the atom-cavity QFI obtained from the unexpanded model after tracing out motion.

Related papers

• Quantum Fisher information in a quenched $p + ip$ superfluid [0.0]
  The quantum Fisher information (QFI) is widely used to characterize quantum phases and transitions.<n>We study the QFI of the long-time state of a two-dimensional p+ip superfluid in equilibrium.<n>Our results show that driving the system out of equilibrium can enhance the diagnostic power of the QI.
  arXiv  Detail & Related papers  (2026-08-21T14:35:23Z)
• End-to-End Molecular Dynamics with a Langevin Thermostat on Quantum Circuits [0.0]
  We construct a quantum-circuit framework for finite-temperature molecular dynamics in the canonical ensemble (NVT)<n>The classical nuclear phase-space distribution is encoded as a Koopman--von Neumann (KvN) wave function, and canonical state preparation is formulated as Langevin-type Fokker--Planck relaxation.
  arXiv  Detail & Related papers  (2026-05-28T16:05:54Z)
• Quantum Liang Information Flow vs. Out-of-Time-Order Correlators as Chaos Diagnostics in the Mixed-Field Ising Chain [0.0]
  We show that the early-time power-law growth and wavefront propagation velocity of QLIF are identical for integrable and chaotic parameters.<n>We identify the time-integrated QLIF as a late-time chaos diagnostic.
  arXiv  Detail & Related papers  (2026-03-16T14:09:42Z)
• Shortcuts to adiabaticity, unexciting backgrounds, and reflectionless potentials [45.88028371034407]
  We exploit the analogy with one-dimensional quantum mechanics, and the well known correspondence between Bogoliubov coefficients in the QHO and transmission/reflection amplitudes in scattering theory.<n>We show how STA completions can be understood in terms of the anti-squeezing operator.
  arXiv  Detail & Related papers  (2026-01-16T13:02:37Z)
• Continual Quantum Architecture Search with Tensor-Train Encoding: Theory and Applications to Signal Processing [68.35481158940401]
  CL-QAS is a continual quantum architecture search framework.<n>It mitigates challenges of costly encoding amplitude and forgetting in variational quantum circuits.<n>It achieves controllable robustness expressivity, sample-efficient generalization, and smooth convergence without barren plateaus.
  arXiv  Detail & Related papers  (2026-01-10T02:36:03Z)
• A Collisional Model Approach to Quantum Phase Sensitivity [0.0]
  Relative phase information encoded by a single qubit $H,varphi,H$ gate sequence is reflected in the quantum Fisher information (QFI)<n>We investigate how relative phase information, encoded by a single qubit $H,varphi,H$ gate sequence, is reflected in the quantum Fisher information (QFI) under noisy dynamics.
  arXiv  Detail & Related papers  (2025-09-20T17:28:22Z)
• Enhanced quantum phase estimation with $q$-deformed nonideal nonclassical light [0.0]
  We investigate quantum phase estimation in a Mach-Zehnder interferometer using q-deformed photon states.<n>We compute the quantum and classical Fisher information and perform Bayesian inference on simulated detector data.
  arXiv  Detail & Related papers  (2025-06-03T12:50:40Z)
• Exact analysis of AC sensors based on Floquet time crystals [41.99844472131922]
  We discuss the behavior of general Floquet Time Crystals (FTCs) in closed systems acting as AC sensors.<n>We show how to induce transitions resonantly between macroscopic paired cat states in the FTC sensor.
  arXiv  Detail & Related papers  (2025-05-28T18:00:05Z)
• Quantum Fisher information and polaron picture for identification of transition coupling in quantum Rabi model [0.6027639313986529]
  We use the quantum Fisher information (QFI) in the quantum Rabi model to identify the transition coupling. An accurate expression for the transition coupling is obtained by the inspiration from the fractional-power-law effect of polaron frequency renormalization.
  arXiv  Detail & Related papers  (2024-03-15T19:49:46Z)
• Effect of Emitters on Quantum State Transfer in Coupled Cavity Arrays [48.06402199083057]
  We study the effects of atoms in cavities which can absorb and emit photons as they propagate down the array. Our model is equivalent to previously examined spin chains in the one-excitation sector and in the absence of emitters.
  arXiv  Detail & Related papers  (2021-12-10T18:52:07Z)
• Simulating the Mott transition on a noisy digital quantum computer via Cartan-based fast-forwarding circuits [62.73367618671969]
  Dynamical mean-field theory (DMFT) maps the local Green's function of the Hubbard model to that of the Anderson impurity model. Quantum and hybrid quantum-classical algorithms have been proposed to efficiently solve impurity models. This work presents the first computation of the Mott phase transition using noisy digital quantum hardware.
  arXiv  Detail & Related papers  (2021-12-10T17:32:15Z)
• Entanglement robustness to excitonic spin precession in a quantum dot [43.55994393060723]
  A semiconductor quantum dot (QD) is an attractive resource to generate polarization-entangled photon pairs. We study the excitonic spin precession (flip-flop) in a family of QDs with different excitonic fine-structure splitting (FSS) Our results reveal that coherent processes leave the time post-selected entanglement of QDs unaffected while changing the eigenstates of the system.
  arXiv  Detail & Related papers  (2020-01-31T13:50:51Z)

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.