Motional decoherence in ultracold Rydberg atom quantum simulators of spin models

• URL: http://arxiv.org/abs/2201.08463v4
• Date: Mon, 20 Nov 2023 03:34:10 GMT
• Title: Motional decoherence in ultracold Rydberg atom quantum simulators of spin models
• Authors: Zewen Zhang, Ming Yuan, Bhuvanesh Sundar and Kaden R. A. Hazzard
• Abstract summary: We show that spin-motion coupling indeed leads to decoherence in qualitative, and often quantitative, agreement with the experimental data. This decoherence will be an important factor to account for in future experiments with Rydberg atoms in optical lattices and microtrap arrays.
• Score: 8.112441746615366
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Ultracold Rydberg atom arrays are an emerging platform for quantum simulation and computing. However, decoherence in these systems remains incompletely understood. Recent experiments [Guardado-Sanchez et al. Phys. Rev. X 8, 021069 (2018)] observed strong decoherence in the quench and longitudinal-field-sweep dynamics of two-dimensional Ising models realized with Lithium-6 Rydberg atoms in optical lattices. This decoherence was conjectured to arise from spin-motion coupling. Here we show that spin-motion coupling indeed leads to decoherence in qualitative, and often quantitative, agreement with the experimental data, treating the difficult spin-motion coupled problem using the discrete truncated Wigner approximation method. We also show that this decoherence will be an important factor to account for in future experiments with Rydberg atoms in optical lattices and microtrap arrays, and discuss methods to mitigate the effect of motion, such as using heavier atoms or deeper traps.

Related papers

• Realization of a Rydberg-dressed extended Bose Hubbard model [0.0]
  We realize an effective one-dimensional extended Bose-Hubbard model (eBHM) We probe the correlated out-of-equilibrium dynamics of extended-range repulsively-bound pairs at low filling, and kinetically-constrained "hard rods" at half filling. Our results demonstrate the versatility of Rydberg dressing in engineering itinerant optical lattice-based quantum simulators.
  arXiv  Detail & Related papers  (2024-05-30T15:07:59Z)
• Simulating Meson Scattering on Spin Quantum Simulators [30.432877421232842]
  We develop two methods to create entangled spin states corresponding to wave packets of composite particles in analog quantum simulators of Ising spin Hamiltonians. With a focus on trapped-ion simulators, we numerically benchmark both methods and show that high-fidelity wave packets can be achieved in near-term experiments.
  arXiv  Detail & Related papers  (2024-03-11T18:00:07Z)
• Amorphous quantum magnets in a two-dimensional Rydberg atom array [44.99833362998488]
  We propose to explore amorphous quantum magnets with an analog quantum simulator. We first present an algorithm to generate amorphous quantum magnets, suitable for Rydberg simulators of the Ising model. We then use semiclassical approaches to get a preliminary insight of the physics of the model.
  arXiv  Detail & Related papers  (2024-02-05T10:07:10Z)
• Strong Spin-Motion Coupling in the Ultrafast Quantum Many-body Dynamics of Rydberg Atoms in a Mott-insulator Lattice [0.0]
  We show a strong spin-motion coupling emerging from the large variation of the interaction potential over the wavefunction spread. We propose a novel approach to tune arbitrarily the strength of the spin-motion coupling relative to the motional energy scale set by trapping potentials.
  arXiv  Detail & Related papers  (2023-11-27T07:04:02Z)
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
  A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
  arXiv  Detail & Related papers  (2023-05-10T12:59:07Z)
• Dilute neutron star matter from neural-network quantum states [58.720142291102135]
  Low-density neutron matter is characterized by the formation of Cooper pairs and the onset of superfluidity. We model this density regime by capitalizing on the expressivity of the hidden-nucleon neural-network quantum states combined with variational Monte Carlo and reconfiguration techniques.
  arXiv  Detail & Related papers  (2022-12-08T17:55:25Z)
• Trimer quantum spin liquid in a honeycomb array of Rydberg atoms [0.0]
  We show the concrete realization of a fundamentally different class of spin liquids in a honeycomb array of Rydberg atoms. In the regime where third-nearest-neighbor atoms lie within the Rydberg blockade, we find a novel ground state. The fidelity of this trimer spin liquid state can be enhanced via dynamical preparation.
  arXiv  Detail & Related papers  (2022-11-01T18:00:00Z)
• Trapped-Ion Quantum Simulation of Collective Neutrino Oscillations [55.41644538483948]
  We study strategies to simulate the coherent collective oscillations of a system of N neutrinos in the two-flavor approximation using quantum computation. We find that the gate complexity using second order Trotter- Suzuki formulae scales better with system size than with other decomposition methods such as Quantum Signal Processing.
  arXiv  Detail & Related papers  (2022-07-07T09:39:40Z)
• 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)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Vibrational dressing in Kinetically Constrained Rydberg Spin Systems [0.0]
  We discuss a facilitated spin system inspired by recent progress in the realization of Rydberg quantum simulators. This platform allows to control and investigate the interplay between facilitation dynamics and the coupling of spin degrees of freedom to lattice vibrations. We show that this leads to the formation of polaronic quasiparticles which are formed by many-body spin states dressed by phonons.
  arXiv  Detail & Related papers  (2020-02-28T19:23:47Z)

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.