Constructing Arbitrary Coherent Rearrangements in Optical Lattices
- URL: http://arxiv.org/abs/2603.04210v1
- Date: Wed, 04 Mar 2026 15:57:12 GMT
- Title: Constructing Arbitrary Coherent Rearrangements in Optical Lattices
- Authors: Alexander Roth, Liyang Qiu, Timon Hilker, Titus Franz, Philipp M. Preiss,
- Abstract summary: Coherent control of motional degrees of freedom of ultracold atoms in optical lattices offers a promising route towards programmable quantum dynamics with massive particles.<n>We propose and analyze a scheme for implementing coherent rearrangement of ultracold atoms, corresponding to arbitrary unitary transformations on single-particle motional states.
- Score: 36.94429692322632
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Coherent control of motional degrees of freedom of ultracold atoms in optical lattices offers a promising route towards programmable quantum dynamics with massive particles. We propose and analyze a scheme for implementing coherent rearrangement of ultracold atoms, corresponding to arbitrary unitary transformations on single-particle motional states. Exploiting an analogy between dynamics in optical superlattices and discrete linear optics, we employ the Clements scheme to systematically construct any global $N$-dimensional single-particle unitary from tunneling and phase shifts in arrays of double wells. Tunneling is controlled globally, while local operations are achieved through site-resolved potential shifts. We numerically investigate the susceptibility of the scheme to intensity noise and addressing crosstalk. We identify key subroutines enabled by this unitary construction, including the Discrete Fourier Transform and the implementation of non-native Hamiltonians. Extending the scheme to two dimensions enables all-to-all atomic rearrangement with a circuit depth that scales sublinearly with the atom number, providing a high-density and highly scalable approach to atom rearrangement.
Related papers
- Confined few-particle systems beyond mean-field theory adopting Gaussian-type orbitals and Morse interparticle interaction [39.146761527401424]
Recent advancements in optical tweezers enable the trapping of arbitrary numbers of neutral atoms and molecules, even arrays of tweezers with variable geometry can be realized.<n>These fascinating breakthroughs require novel full-dimensional beyond mean-field treatments for systems with more than two confined particles spread over traps that are arranged arbitrarily in space.
arXiv Detail & Related papers (2025-09-12T15:35:32Z) - Avoided-crossings, degeneracies and Berry phases in the spectrum of quantum noise through analytic Bloch-Messiah decomposition [49.1574468325115]
"analytic Bloch-Messiah decomposition" provides approach for characterizing dynamics of quantum optical systems.<n>We show that avoided crossings arise naturally when a single parameter is varied, leading to hypersensitivity of the singular vectors.<n>We highlight the possibility of programming the spectral response of photonic systems through the deliberate design of avoided crossings.
arXiv Detail & Related papers (2025-04-29T13:14:15Z) - Direct and mediated dipole-dipole interactions in a reconfigurable array of optical traps [20.046863284981917]
Optically levitated nanoparticles in vacuum experience both electrostatic and light-induced dipole-dipole interactions.<n>Inspired by tunable couplers in superconducting circuits, we implement an ancillary nanoparticles that functions as a coupler between two target nanoparticles.<n>Within a reconfigurable three-particle array, we demonstrate broad tunability of the direct dipole-dipole interaction by controlling the phase and position of the traps.
arXiv Detail & Related papers (2024-08-12T16:11:49Z) - Sculpting ultrastrong light-matter coupling through spatial matter
structuring [0.0]
We experimentally implement a novel strategy to sculpt ultrastrong multi-mode coupling.
We control the number of light-matter coupled modes, their octave-spanning frequency spectra, and their response to magnetic tuning.
This offers novel pathways for controlling dissipation, tailoring quantum light sources, nonlinearities, correlations, as well as entanglement in quantum information processing.
arXiv Detail & Related papers (2023-11-30T06:31:56Z) - Chiral phase modulation and tunable broadband perfect absorber using the
coherent cold atomic ensemble [21.31425940866288]
We investigate the two-channel nonreciprocal scattering of a coherent atomic ensemble under the linear spatial Kramers-Kronig modulation.
Our proposal may be used to design and integrate some all-optical functional devices at extremely low power levels for quantum information processing and optical communication networks.
arXiv Detail & Related papers (2023-10-01T06:27:45Z) - Individually tunable tunnelling coefficients in optical lattices using local periodic driving [1.6385815610837167]
We show theoretically how local control over individual tunnelling links in an optical lattice can be achieved.
We employ Floquet theory to demonstrate how this provides full individual control over the tunnelling amplitudes in one dimension.
arXiv Detail & Related papers (2023-09-21T14:44:43Z) - Scalable Heteronuclear Architecture of Neutral Atoms Based on EIT [3.8525292841668546]
We propose a scalable heteronuclear architecture of parallel implementation of CNOT gates in arrays of alkali-metal neutral atoms for quantum information processing.
We numerically optimized the system parameters to achieve the fidelity for parallelly implemented CNOT gates around $mathcalF=95%$ for the experimentally feasible conditions.
arXiv Detail & Related papers (2023-03-29T03:27:09Z) - 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) - Deterministic single-atom source of quasi-superradiant $N$-photon pulses [62.997667081978825]
Scheme operates with laser and cavity fields detuned from the atomic transition by much more than the excited-state hyperfine splitting.
This enables reduction of the dynamics to that of a simple, cavity-damped Tavis-Cummings model with the collective spin determined by the total angular momentum of the ground hyperfine level.
arXiv Detail & Related papers (2020-12-01T03:55:27Z) - Hyperentanglement in structured quantum light [50.591267188664666]
Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols.
Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes.
We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
arXiv Detail & Related papers (2020-06-02T18:00:04Z)
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.