Enhanced coupling of electron and nuclear spins by quantum tunneling resonances

• URL: http://arxiv.org/abs/2201.01255v1
• Date: Tue, 4 Jan 2022 17:33:02 GMT
• Title: Enhanced coupling of electron and nuclear spins by quantum tunneling resonances
• Authors: Anatoli Tsinovoy, Or Katz, Arie Landau, and Nimrod Moiseyev
• Abstract summary: We propose a controllable mechanism to enhance this transfer rate. We analyze the spin dynamics of helium-3 atoms with hot, optically-excited potassium atoms. We find a resonant enhancement of the spin-exchange cross section by up to six orders of magnitude and two orders of magnitude enhancement for the thermally averaged, polarization rate-coefficient.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Noble-gas spins feature hours long coherence times owing to their great isolation from the environment, and find practical usage in various applications. However, this isolation leads to extremely slow preparation times, relying on weak spin transfer from an electron-spin ensemble. Here we propose a controllable mechanism to enhance this transfer rate. We analyze the spin dynamics of helium-3 atoms with hot, optically-excited potassium atoms and reveal the formation of quasi-bound states in resonant binary collisions. We find a resonant enhancement of the spin-exchange cross section by up to six orders of magnitude and two orders of magnitude enhancement for the thermally averaged, polarization rate-coefficient. We further examine the effect for various other noble gases and find that the enhancement is universal. We outline feasible conditions under which the enhancement may be experimentally observed and practically utilized.

Related papers

• Spin-self-organization in an optical cavity facilitated by inhomogeneous broadening [0.0]
  We study the onset of collective spin-self-organization in a thermal ensemble of driven two-level atoms confined in an optical cavity. We find that inhomogeneous Doppler broadening facilitates the onset of spin-self-organization.
  arXiv  Detail & Related papers  (2024-07-29T05:03:53Z)
• Effects of resonant dipole-dipole interactions in the spin noise of atomic vapors [0.0]
  We report unusual lineshapes of the spin noise spectra with a strong density dependence. We show that these features are the hallmark of a strong dipole-dipole interaction between binaries within the ensemble. This work demonstrates the potential of spin noise spectroscopy to observe and quantify strong interactions occurring within a particle ensemble.
  arXiv  Detail & Related papers  (2024-06-28T18:41:23Z)
• Dissipative stabilization of maximal entanglement between non-identical emitters via two-photon excitation [49.1574468325115]
  Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement. We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
  arXiv  Detail & Related papers  (2023-06-09T16:49:55Z)
• Probing dynamics of a two-dimensional dipolar spin ensemble using single qubit sensor [62.997667081978825]
  We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal. We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder. Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
  arXiv  Detail & Related papers  (2022-07-21T18:00:17Z)
• Driving Force and Nonequilibrium Vibronic Dynamics in Charge Separation of Strongly Bound Electron-Hole Pairs [59.94347858883343]
  We study the dynamics of charge separation in one, two and three-dimensional donor-acceptor networks. This allows us to identify the precise conditions in which underdamped vibrational motion induces efficient long-range charge separation.
  arXiv  Detail & Related papers  (2022-05-11T17:51:21Z)
• 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)
• Rapidly enhanced spin polarization injection in an optically pumped spin ratchet [49.1301457567913]
  We report on a strategy to boost the spin injection rate by exploiting electrons that can be rapidly polarized. We demonstrate this in a model system of Nitrogen Vacancy center electrons injecting polarization into a bath of 13C nuclei in diamond. Through a spin-ratchet polarization transfer mechanism, we show boosts in spin injection rates by over two orders of magnitude.
  arXiv  Detail & Related papers  (2021-12-14T08:23:10Z)
• Quantum dynamics simulation of intramolecular singlet fission in covalently linked tetracene dimer [0.0]
  We study singlet fission in tetracene para-dimers, covalently linked by a phenyl group. In contrast to most previous works, we account for the full quantum dynamics of the combined excitonic and vibrational system.
  arXiv  Detail & Related papers  (2021-07-29T13:15:24Z)
• Strong coupling of alkali spins to noble-gas spins with hour-long coherence time [0.0]
  Nuclear spins of noble gases can maintain coherence for hours at ambient conditions. We experimentally achieve strong coherent coupling between noble-gas spins and the optically-accessible spins of alkali-metal vapor. These results open a route for efficient and rapid interfacing with noble-gas spins for applications in quantum sensing and information.
  arXiv  Detail & Related papers  (2021-02-04T18:38:32Z)
• Room Temperature Coherent Control of Spin Defects in hexagonal Boron Nitride [0.0]
  Optically active defects in solids with accessible spin states are promising candidates for solid state quantum information and sensing applications. We realize coherent control of ensembles of boron vacancy centers in hexagonal boron nitride (hBN) Our results are important for employment of van der Waals materials for quantum technologies.
  arXiv  Detail & Related papers  (2020-10-23T16:31:37Z)
• Optically pumped spin polarization as a probe of many-body thermalization [50.591267188664666]
  We study the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. We find good thermal contact throughout the nuclear spin bath, virtually independent of the hyperfine coupling strength. Our results open intriguing opportunities to study the onset of thermalization in a system by controlling the internal interactions within the bath.
  arXiv  Detail & Related papers  (2020-05-01T23:16:33Z)

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.