Quantum control of ion-atom collisions beyond the ultracold regime

• URL: http://arxiv.org/abs/2407.06073v1
• Date: Mon, 8 Jul 2024 16:14:17 GMT
• Title: Quantum control of ion-atom collisions beyond the ultracold regime
• Authors: Maks Z. Walewski, Matthew D. Frye, Or Katz, Meirav Pinkas, Roee Ozeri, Michał Tomza,
• Abstract summary: We show that magnetically tunable Feshbach resonances can be used to control inelastic collisions between a single trapped Sr$+$ ion and Rb atoms. With our model, we discover multiple measurable Feshbach resonances for magnetic fields from 0 to 400 G, which allow significant enhancement of spin-exchange rates at temperatures as high as 1 mK.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Control of microscopic physical systems is a prerequisite for experimental quantum science and its applications. Neutral atomic and molecular systems can be controlled using tunable scattering resonances. However, the resonant control of effective interactions has so far been limited to the ultracold regime, where quantum effects become manifest. Ultracold temperatures are still out of reach for most hybrid trapped ion-atom systems, a prospective platform for quantum technologies and fundamental research. Here we show that magnetically tunable Feshbach resonances can be used to control inelastic collisions between a single trapped Sr${}^+$ ion and Rb atoms high above the ultracold regime. We measure inelastic collision probabilities and use the results to calibrate a comprehensive theoretical model of ion-atom collisions. The observed collision dynamics show signatures of quantum interference, resulting in the pronounced state and mass dependence of the collision rates in the multiple-partial-wave regime. With our model, we discover multiple measurable Feshbach resonances for magnetic fields from 0 to 400 G, which allow significant enhancement of spin-exchange rates at temperatures as high as 1 mK. Future observation of the predicted resonances should allow precise calibration and control of the short-range dynamics in the ${\text{Sr}^++\text{Rb}}$ collisions under unprecedentedly warm conditions.

Related papers

• Quantum Rabi oscillations in the semiclassical limit: backreaction on the cavity field and entanglement [89.99666725996975]
  We show that for a strong atom-field coupling, when the duration of the $pi $pulse is below $100omega -1$, the behaviour of the atomic excitation probability deviates significantly from the textbook. In the rest of this work we study numerically the backreaction of the qubit on the cavity field and the resulting atom-field entanglement.
  arXiv  Detail & Related papers  (2025-04-12T23:24:59Z)
• Feshbach hypothesis of high-Tc superconductivity in cuprates [0.0]
  We present a Feshbach perspective on the origin of strong pairing in Fermi-Hubbard type models. Existing experimental and numerical results on hole-doped cuprates lead us to conjecture the existence of a light, long-lived, low-energy excited state of two holes. The emergent Feshbach resonance we propose could also underlie superconductivity in other doped antiferromagnetic Mott insulators.
  arXiv  Detail & Related papers  (2023-12-05T18:59:59Z)
• Controlling the interactions in a cold atom quantum impurity system [0.0]
  We implement an experimental architecture in which a single atom of K is trapped in an optical tweezer, and is immersed in a bath of Rb atoms at ultralow temperatures. We concentrate on the characterization and control of the interactions between the two subsystems. Our results open a range of new possibilities in quantum simulations of quantum impurity models, quantum information, and quantum thermodynamics.
  arXiv  Detail & Related papers  (2023-10-04T12:37:17Z)
• 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)
• Scalable spin squeezing in a dipolar Rydberg atom array [2.392520546501394]
  We show how to enhance the precision of measurements beyond the standard quantum limit. To do so, one can reshape the quantum projection noise -- a strategy known as squeezing. We present two independent refinements: first, using a multistep spin-squeezing protocol allows us to further enhance the squeezing by approximately 1 dB, and second, leveraging Floquet engineering to realize Heisenberg interactions.
  arXiv  Detail & Related papers  (2023-03-14T16:35:17Z)
• Quantum vibrational mode in a cavity confining a massless spinor field [91.3755431537592]
  We analyse the reaction of a massless (1+1)-dimensional spinor field to the harmonic motion of one cavity wall. We demonstrate that the system is able to convert bosons into fermion pairs at the lowest perturbative order.
  arXiv  Detail & Related papers  (2022-09-12T08:21:12Z)
• Quantum suppression of cold reactions far from the s-wave energy limit [4.426312217102122]
  We study resonant charge-exchange reactions between individual cold pairs of neutral $87$Rb atoms and optically-inaccessible $87$Rb$+$ ions far above the $s$-wave regime. Our results indicate that even at temperatures three orders of magnitude higher than the ultracold $s$-wave regime, quantum interference in collisions persists and impacts reaction rates.
  arXiv  Detail & Related papers  (2022-08-16T12:40:59Z)
• Dynamical hadron formation in long-range interacting quantum spin chains [0.0]
  We study scattering events due to meson collisions in a quantum spin chain with long-range interactions. We show how novel hadronic boundstates, e.g. with four constituent particles akin to tetraquarks, may form dynamically in fusion events. We propose two controllable protocols which allow for a clear observation of dynamical hadron formation.
  arXiv  Detail & Related papers  (2022-04-12T09:06:47Z)
• 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)
• Hyper-entangling mesoscopic bound states [0.0]
  We show that the post-collision state will be hyper-entangled in spatial degrees of freedom and atom number within solitons. Results are based on simulations of colliding quantum solitons in a quintic interaction model beyond the mean-field.
  arXiv  Detail & Related papers  (2022-02-12T18:28:43Z)
• Experimental Realization of the Rabi-Hubbard Model with Trapped Ions [7.2123846411070325]
  We report an experimental realization of the Rabi-Hubbard model using up to $16$ trapped ions. We present a controlled study of its equilibrium properties and quantum dynamics. For larger-size systems of $16$ ions and $16$ phonon modes, the effective Hilbert space dimension exceeds $257$, whose dynamics is intractable for classical supercomputers.
  arXiv  Detail & Related papers  (2021-10-07T07:24:45Z)
• Control of reactive collisions by quantum interference [0.0]
  In this study, we achieved magnetic control of reactive scattering in an ultracold mixture of $23$Na atoms and $23$Na$6$Li molecules. By controlling the phase of the scattering wave function via a Feshbach resonance, we modified the loss rate by more than a factor of $100$, from far below to far above the universal limit.
  arXiv  Detail & Related papers  (2021-09-08T21:37:14Z)
• 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)
• Observation of Feshbach resonances between a single ion and ultracold atoms [0.0]
  Trapped atomic and molecular systems, neutral and charged, are at the forefront of quantum science. Here we demonstrate Feshbach resonances between ions and atoms, using magnetically tunable interactions between $138$Ba$+$ ions and $6$Li atoms.
  arXiv  Detail & Related papers  (2021-05-19T20:15:17Z)
• Evolution of a Non-Hermitian Quantum Single-Molecule Junction at Constant Temperature [62.997667081978825]
  We present a theory for describing non-Hermitian quantum systems embedded in constant-temperature environments. We find that the combined action of probability losses and thermal fluctuations assists quantum transport through the molecular junction.
  arXiv  Detail & Related papers  (2021-01-21T14:33:34Z)
• Exact many-body scars and their stability in constrained quantum chains [55.41644538483948]
  Quantum scars are non-thermal eigenstates characterized by low entanglement entropy. We study the response of these exact quantum scars to perturbations by analysing the scaling of the fidelity susceptibility with system size.
  arXiv  Detail & Related papers  (2020-11-16T19:05:50Z)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations [77.34726150561087]
  The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems. Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations. Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
  arXiv  Detail & Related papers  (2020-07-20T18:00:02Z)

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.