Single-bounce quantum gravimeter to measure the free-fall of anti-hydrogen

• URL: http://arxiv.org/abs/2505.04771v1
• Date: Wed, 07 May 2025 19:48:03 GMT
• Title: Single-bounce quantum gravimeter to measure the free-fall of anti-hydrogen
• Authors: Joachim Guyomard, Pierre Cladé, Serge Reynaud,
• Abstract summary: We introduce an innovative concept for a matter-wave gravimeter, where atoms prepared in a Heisenberg-limited quantum state perform a single bounce on a surface followed by a free fall that reveals interferences.<n>This new approach to quantum gravimetry produces a more robust interference pattern compared to previous multi-bounce proposals.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce an innovative concept for a matter-wave gravimeter, where atoms prepared in a Heisenberg-limited quantum state perform a single bounce on a surface followed by a free fall that reveals interferences. This new approach to quantum gravimetry produces a more robust interference pattern compared to previous multi-bounce proposals. We specify numbers and expected performance for the GBAR experiment, which aims at measuring the free-fall acceleration of antihydrogen at CERN antimatter facilities, and show that this approach improves the expected accuracy of the measurement. Our method opens the door to gravity measurements on rare or exotic atomic species, especially in situations where experimental time or detection events are fundamentally constrained.

Related papers

• Probing the Physical Reality of Projective Measurements [0.0]
  We test whether the postulate of a measurement acting as an instantaneous projection onto an eigenstate of the measurement apparatus is compatible with physical reality.<n>We also develop a continuous description of a quantum measurement finding that its repeated-measurement statistics drastically differ from the projective case.
  arXiv  Detail & Related papers  (2025-06-25T17:04:55Z)
• Work Statistics and Quantum Trajectories: No-Click Limit and non-Hermitian Hamiltonians [50.24983453990065]
  We present a framework for quantum work statistics in continuously monitored quantum systems.<n>Our approach naturally incorporates non-Hermitian dynamics arising from quantum jump processes.<n>We illustrate our theoretical framework by analyzing a one-dimensional transverse-field Ising model under local spin monitoring.
  arXiv  Detail & Related papers  (2025-04-15T23:21:58Z)
• Production and stabilization of a spin mixture of ultracold dipolar Bose gases [39.58317527488534]
  We present experimental results for a mixture composed of the two lowest Zeeman states of $162$Dy atoms.<n>Due to an interference phenomenon, the rate for such inelastic processes is dramatically reduced with respect to the Wigner threshold law.
  arXiv  Detail & Related papers  (2024-07-11T17:37:01Z)
• Effect of the readout efficiency of quantum measurement on the system entanglement [44.99833362998488]
  We quantify the entanglement for a particle on a 1d quantum random walk under inefficient monitoring. We find that the system's maximal mean entanglement at the measurement-induced quantum-to-classical crossover is in different ways by the measurement strength and inefficiency.
  arXiv  Detail & Related papers  (2024-02-29T18:10:05Z)
• 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)
• Testing Whether Gravity Acts as a Quantum Entity When Measured [0.0]
  A defining signature of classical systems is "in principle measurability" without disturbance. We describe a multi-interferometer experimental setup that can, in principle, reveal the nonclassicality of a spatial superposition-sourced gravitational field.
  arXiv  Detail & Related papers  (2023-07-16T19:10:25Z)
• A high-flux source system for matter-wave interferometry exploiting tunable interactions [33.92525320044496]
  Atom interferometers allow determining inertial effects to high accuracy. Here we report on a high-flux source of ultra-cold atoms with free expansion rates near the Heisenberg limit directly upon release from the trap.
  arXiv  Detail & Related papers  (2023-07-13T14:10:53Z)
• Mass-Independent Scheme to Test the Quantumness of a Massive Object [0.0]
  We make crucial modifications to the standard tools for probing the quantum violation of the pivotal classical notion of macrorealism (MR) Our adaptation enables probing quantum violations for literally any mass, momentum, and frequency. These should drastically simplify the experimental effort in testing the nonclassicality of massive objects.
  arXiv  Detail & Related papers  (2022-11-18T16:18:01Z)
• Quantum Back-action Limits in Dispersively Measured Bose-Einstein Condensates [0.0]
  We theoretically and experimentally characterize quantum back-action in atomic Bose-Einstein condensates interacting with a far-from resonant laser beam. We experimentally quantify the resulting wavefunction change in terms of the contrast of a Ramsey interferometer. This result is a necessary precursor for achieving true quantum back-action limited measurements of quantum gases.
  arXiv  Detail & Related papers  (2022-09-09T17:04:36Z)
• 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)
• Constraints on probing quantum coherence to infer gravitational entanglement [0.0]
  Gravity mediated entanglement generation so far appears to be the key ingredient for a potential experiment. With measurements performed only on the atoms, a coherence revival test is proposed for verifying this entanglement generation. We explore formulations of such a protocol, and specifically find that in the envisioned regime of operation with high thermal excitation, semi-classical models, where there is no concept of entanglement, also give the same experimental signatures.
  arXiv  Detail & Related papers  (2021-06-15T15:29:35Z)
• A complete analysis of spin coherence in the full-loop Stern Gerlach interferometer using non-squeezed and squeezed coherent states of the Quantum harmonic oscillator [0.0]
  We present a rigorous mathematical analysis for the visibility in a general SG interferometer for non-squeezed and squeezed thermal coherent states. We show that for wave-packet split sizes of the order of microns, masses of the order of 1.0e-14 - 1.0e-15 kg can be used to realize such a proposal for time intervals as high as 0.5 seconds.
  arXiv  Detail & Related papers  (2021-05-08T21:39:38Z)
• Quantum probes for universal gravity corrections [62.997667081978825]
  We review the concept of minimum length and show how it induces a perturbative term appearing in the Hamiltonian of any quantum system. We evaluate the Quantum Fisher Information in order to find the ultimate bounds to the precision of any estimation procedure. Our results show that quantum probes are convenient resources, providing potential enhancement in precision.
  arXiv  Detail & Related papers  (2020-02-13T19:35:07Z)

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.