Metrology using atoms in an array of double-well potentials

• URL: http://arxiv.org/abs/2507.11395v1
• Date: Tue, 15 Jul 2025 15:06:49 GMT
• Title: Metrology using atoms in an array of double-well potentials
• Authors: Danish Ali Hamza, Jan Chwedeńczuk,
• Abstract summary: Quantum effects, such as entanglement, can enhance metrological sensitivity beyond the standard quantum limit.<n>Here, we consider an alternative method of generating scalable, many-body entangled states.<n>We demonstrate this entanglement can improve the sensitivity of quantum sensors.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum effects, such as entanglement, Einstein-Podolsky-Rosen steering, and Bell correlations, can enhance metrological sensitivity beyond the standard quantum limit. These correlations are typically generated through interactions between atoms or molecules, or during the passage of a laser pulse through a birefringent crystal. Here, we consider an alternative method of generating scalable, many-body entangled states, and demonstrate their usability for quantum-enhanced metrology. Our setup is a one-dimensional (1D) array of double-well potentials holding independent and uncorrelated Bose-Einstein condensates. The beam-splitting transformation mixes the signal between adjacent wells and yields a strongly entangled state through a many-body equivalent of the Hong-Ou-Mandel effect. We demonstrate this entanglement can improve the sensitivity of quantum sensors. In our analysis, we account for the effects of atomic fluctuations and identify the optimal measurement that saturates the quantum Cramer-Rao bound.

Related papers

• Multi-Photon Quantum Rabi Models with Center-of-Mass Motion [45.73541813564926]
  We introduce a rigorous, second-quantized framework for describing multi-$Lambda$-atoms in a cavity.<n>A key feature of our approach is the systematic application of a Hamiltonian averaging theory to the atomic field operators.<n>A significant finding is the emergence of a particle-particle interaction mediated by ancillary states.
  arXiv  Detail & Related papers  (2025-07-07T09:50:48Z)
• Electrically tunable quantum interference of atomic spins on surfaces [43.73138793116028]
  We demonstrate electrical control of quantum interference using atomic spins on an insulating film in a scanning tunneling microscope.<n>We modulate the atomically-confined magnetic interaction between the probe tip and surface atoms with a strong electric field, and drive the spin state rapidly through the energy-level anticrossing.<n>Results open new avenues for all-electrical quantum manipulation in spin-based quantum processors.
  arXiv  Detail & Related papers  (2025-06-01T14:28:36Z)
• Mach-Zehnder atom interferometry with non-interacting trapped Bose Einstein condensates [0.0]
  coherent manipulation of a quantum wave is at the core of quantum sensing.<n>BECs are the archetype of coherent matter waves, but their manipulation between trapped spatial modes has been limited by strong interparticle collisions.<n>We operate several Mach-Zehnder interferometers in parallel, canceling common-mode potential instabilities by a differential analysis, thus demonstrating a trapped-atom gradiometer.
  arXiv  Detail & Related papers  (2025-04-24T09:18:01Z)
• Long-lived entanglement of molecules in magic-wavelength optical tweezers [41.94295877935867]
  We present the first realisation of a microwave-driven entangling gate between two molecules. We show that the magic-wavelength trap preserves the entanglement, with no measurable decay over 0.5 s. The extension of precise quantum control to complex molecular systems will allow their additional degrees of freedom to be exploited across many domains of quantum science.
  arXiv  Detail & Related papers  (2024-08-27T09:28:56Z)
• Dipolar quantum solids emerging in a Hubbard quantum simulator [45.82143101967126]
  Long-range and anisotropic interactions promote rich spatial structure in quantum mechanical many-body systems. We show that novel strongly correlated quantum phases can be realized using long-range dipolar interaction in optical lattices. This work opens the door to quantum simulations of a wide range of lattice models with long-range and anisotropic interactions.
  arXiv  Detail & Related papers  (2023-06-01T16:49:20Z)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Exploring quantum correlations in a hybrid optomechanical system [0.0]
  We propose a scheme of two coupled optomechanical cavities to enhance the intracavity entanglement. Photon hopping is employed to establish couplings between optical modes, while phonon is utilized to establish couplings between mechanical tunneling resonators.
  arXiv  Detail & Related papers  (2022-04-16T08:47:50Z)
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
  Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
  arXiv  Detail & Related papers  (2022-03-31T13:32:12Z)
• Integrated quantum polariton interferometry [0.0]
  We show that integrated circuits of single polaritons can be arranged to build deterministic quantum logic gates. Our results introduce a novel paradigm for the development of practical quantum polaritonic devices.
  arXiv  Detail & Related papers  (2021-07-28T14:09:23Z)
• Quantum amplification of boson-mediated interactions [0.0]
  We experimentally demonstrate the amplification of a boson-mediated interaction between two trapped-ion qubits by parametric modulation of the trapping potential. The technique can be used in any quantum platform where parametric modulation of the boson channel is possible.
  arXiv  Detail & Related papers  (2020-09-29T23:22:55Z)
• Driving Quantum Correlated Atom-Pairs from a Bose-Einstein Condensate [0.0]
  We investigate one such control protocol that demonstrates the resonant amplification of quasimomentum pairs from a Bose-Einstein condensate. A classical external field that excites pairs of particles with the same energy but opposite momenta is reminiscent of the coherently-driven nonlinearity in a parametric amplifier crystal.
  arXiv  Detail & Related papers  (2020-01-08T00:11:26Z)

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.