High-contrast double Bragg interferometry via detuning control

• URL: http://arxiv.org/abs/2508.10968v1
• Date: Thu, 14 Aug 2025 16:04:05 GMT
• Title: High-contrast double Bragg interferometry via detuning control
• Authors: Rui Li, V. J. Martínez-Lahuerta, Naceur Gaaloul, Klemens Hammerer,
• Abstract summary: We propose high-contrast Mach-Zehnder atom interferometers based on double Bragg diffraction (DBD)<n>We introduce a tri-frequency laser scheme with dynamic detuning control to mitigate differential Doppler shifts and experimental imperfections.<n>These results offer practical pathways to enhancing DBD-based interferometers for precision quantum sensing and fundamental physics tests.
• Score: 1.737881506105486
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose high-contrast Mach-Zehnder atom interferometers based on double Bragg diffraction (DBD) operating under external acceleration. To mitigate differential Doppler shifts and experimental imperfections, we introduce a tri-frequency laser scheme with dynamic detuning control. We evaluate four detuning-control strategies&mdash;conventional DBD, constant detuning, linear detuning sweep (DS-DBD), and a hybrid protocol combining detuning sweep with optimal control theory (OCT)&mdash;using exact numerical simulations and a five-level S-matrix model. The OCT strategy provides the highest robustness, maintaining contrast above 95\% under realistic conditions, while the DS-DBD strategy sustains contrast above 90\% for well-collimated Bose-Einstein condensates. These results offer practical pathways to enhancing DBD-based interferometers for precision quantum sensing and fundamental physics tests.

Related papers

• Minimal-Energy Optimal Control of Tunable Two-Qubit Gates in Superconducting Platforms Using Continuous Dynamical Decoupling [0.0]
  We present a scheme for generating high-fidelity entangling gates in superconducting platforms by continuous dynamical decoupling (CDD)<n>We suppress residual couplings, calibration drifting, and quasistatic noise, resulting in a stable effective Hamiltonian.<n>These results establish CDD-enhanced variational geometric optimal control as a practical and noise-resilient scheme for designing superconducting entangling gates.
  arXiv  Detail & Related papers  (2026-01-15T14:35:33Z)
• Robust Quantum Control for Bragg Pulse Design in Atom Interferometry [0.0]
  We formulate a robust optimal control algorithm to synthesize minimum energy pulses that can transfer a cold atom system into various momentum states.<n>The algorithm is applied to optimize the atomic beam operation in ultra-cold atom interferometry.
  arXiv  Detail & Related papers  (2025-02-07T02:29:27Z)
• Dynamically Enhanced Two-Photon Spectroscopy [0.0]
  A novel quantum control protocol utilizing two-photon processes with trigonometric pulse modulation is developed. The proposed technique excels at single-photon resonance in contrast to the well-known adiabatic elimination (AE) regime.
  arXiv  Detail & Related papers  (2024-11-08T16:16:26Z)
• Robust double Bragg diffraction via detuning control [1.6198798154032146]
  We present a theoretical model and numerical optimization of double Bragg diffraction.<n>We derive an effective two-level-system Hamiltonian based on the Magnus expansion in the so-called "quasi-Bragg regime"<n>We develop an artificial intelligence-aided optimal detuning control protocol, showcasing enhanced robustness against both polarization errors and Doppler effects.
  arXiv  Detail & Related papers  (2024-07-05T09:21:31Z)
• Function Approximation for Reinforcement Learning Controller for Energy from Spread Waves [69.9104427437916]
  Multi-generator Wave Energy Converters (WEC) must handle multiple simultaneous waves coming from different directions called spread waves. These complex devices need controllers with multiple objectives of energy capture efficiency, reduction of structural stress to limit maintenance, and proactive protection against high waves. In this paper, we explore different function approximations for the policy and critic networks in modeling the sequential nature of the system dynamics.
  arXiv  Detail & Related papers  (2024-04-17T02:04:10Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• 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)
• Characterization of an atom interferometer in the quasi-Bragg regime [58.720142291102135]
  We focus on an intermediate regime between the Raman-Nath and the Bragg regimes, the so-called quasi-Bragg regime. The experimental results are in a good agreement with a full numerical integration of the Schr"odinger equation.
  arXiv  Detail & Related papers  (2021-12-06T14:49:45Z)
• Engineering Strong Beamsplitter Interaction between Bosonic Modes via Quantum Optimal Control Theory [0.0]
  We show how quantum optimal control theory can be used to improve the beamsplitter interaction between two cavities. We find that replacing the two-tone protocol by a three-tone protocol accelerates the effective beamsplitter rate. We show how to further improve the three-tone protocol via gradient-based optimization while keeping the optimized drives experimentally feasible.
  arXiv  Detail & Related papers  (2021-11-30T17:11:38Z)
• Fast high-fidelity single-qubit gates for flip-flop qubits in silicon [68.8204255655161]
  flip-flop qubit is encoded in the states with antiparallel donor-bound electron and donor nuclear spins in silicon. We study the multilevel system that is formed by the interacting electron and nuclear spins. We propose an optimal control scheme that produces fast and robust single-qubit gates in the presence of low-frequency noise.
  arXiv  Detail & Related papers  (2021-01-27T18:37:30Z)
• Optimal control of a nitrogen-vacancy spin ensemble in diamond for sensing in the pulsed domain [52.77024349608834]
  Defects in solid state materials provide an ideal platform for quantum sensing. Control of such an ensemble is challenging due to the spatial variation in both the defect energy levels and in any control field across a macroscopic sample. We experimentally demonstrate that we can overcome these challenges using Floquet theory and optimal control optimization methods.
  arXiv  Detail & Related papers  (2021-01-25T13:01:05Z)

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.