Coherent population trapping and spin relaxation of a silicon vacancy center in diamond at mK temperatures

• URL: http://arxiv.org/abs/2409.14856v1
• Date: Mon, 23 Sep 2024 09:49:09 GMT
• Title: Coherent population trapping and spin relaxation of a silicon vacancy center in diamond at mK temperatures
• Authors: Shuhao Wu, Xinzhu Li, Ian Gallagher, Benjamin Lawrie, Hailin Wang,
• Abstract summary: Near and below 1 K, phonon-induced spin dephasing becomes negligible compared with that induced by the spin bath of naturally abundant 13C atoms. A nearly 100-fold increase in spin lifetime is observed when the temperature is lowered from 4 K to slightly below 1 K. Two-phonon spin-flip transitions play an essential role in the spin relaxation of SiV ground states.
• Score: 4.292162781754372
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report experimental studies of coherent population trapping and spin relaxation in a temperature range between 4 K and 100 mK in a silicon vacancy (SiV) center subject to a transverse magnetic field. Near and below 1 K, phonon-induced spin dephasing becomes negligible compared with that induced by the spin bath of naturally abundant 13C atoms. The temperature dependence of the spin dephasing rates agrees with the theoretical expectation that phonon-induced spin dephasing arises primarily from orbital relaxation induced by first order electron-phonon interactions. A nearly 100-fold increase in spin lifetime is observed when the temperature is lowered from 4 K to slightly below 1 K, indicating that two-phonon spin-flip transitions play an essential role in the spin relaxation of SiV ground states.

Related papers

• Relationship between spinons and magnetic fields in a fractionalized state [4.655132770772739]
  Application of a magnetic field up to 14 T surprisingly breaks the signature temperature-linearity of the heat capacity of both phases below 150 mK. Magnetic field readily suppresses the thermal conductivity, and more strongly with decreasing temperature below 4 K.
  arXiv  Detail & Related papers  (2024-08-24T20:06:26Z)
• Dynamics of molecular rotors in bulk superfluid helium [68.8204255655161]
  We report on the experimental study of the laser-induced rotation of helium dimers inside the superfluid $4mathrmHe$ bath at variable temperature. The observed temperature dependence suggests a non-equilibrium evolution of the quantum bath, accompanied by the emission of the wave of second sound.
  arXiv  Detail & Related papers  (2023-04-08T01:22:19Z)
• Spin-phonon decoherence in solid-state paramagnetic defects from first principles [79.4957965474334]
  Paramagnetic defects in diamond and hexagonal boron nitride possess a unique combination of spin and optical properties that make them solid-state qubits. Despite the coherence of these spin qubits being critically limited by spin-phonon relaxation, a full understanding of this process is not yet available. We demonstrate that low-frequency two-phonon modulations of the zero-field splitting are responsible for spin relaxation and decoherence.
  arXiv  Detail & Related papers  (2022-12-22T13:48:05Z)
• Temperature-dependent spin-lattice relaxation of the nitrogen-vacancy spin triplet in diamond [0.0]
  We report measurements of the relaxation rates on the nitrogen-vacancy center's electronic ground-state spin triplet. We show that the temperature dependencies of the rates are reproduced by an ab initio theory of Raman scattering due to second-order spin-phonon interactions.
  arXiv  Detail & Related papers  (2022-09-28T22:05:51Z)
• 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)
• Computational Insights into Electronic Excitations, Spin-Orbit Coupling Effects, and Spin Decoherence in Cr(IV)-based Molecular Qubits [63.18666008322476]
  We provide insights into key properties of Cr(IV)-based molecules aimed at assisting chemical design of efficient molecular qubits. We find that the sign of the uniaxial zero-field splitting (ZFS) parameter is negative for all considered molecules. We quantify (super)hyperfine coupling to the $53$Cr nuclear spin and to the $13C and $1H nuclear spins.
  arXiv  Detail & Related papers  (2022-05-01T01:23:10Z)
• Anisotropic electron-nuclear interactions in a rotating quantum spin bath [55.41644538483948]
  Spin-bath interactions are strongly anisotropic, and rapid physical rotation has long been used in solid-state nuclear magnetic resonance. We show that the interaction between electron spins of nitrogen-vacancy centers and a bath of $13$C nuclear spins introduces decoherence into the system. Our findings offer new insights into the use of physical rotation for quantum control with implications for quantum systems having motional and rotational degrees of freedom that are not fixed.
  arXiv  Detail & Related papers  (2021-05-16T06:15:00Z)
• Low Temperature Relaxation of Donor Bound Electron Spins in $^{28}$Si:P [0.0]
  We measure the spin-lattice relaxation of donor bound electrons in ultrapure, isotopically enriched, phosphorus-doped $28$Si:P. The $28$Si:P spin relaxation rate increases linearly with temperature in the regime below 1 K. At high magnetic fields, the spin relaxation is dominated by the magnetic field dependent single phonon spin relaxation process.
  arXiv  Detail & Related papers  (2021-04-12T16:54:52Z)
• Insights into nature of magnetization plateaus of a nickel complex [Ni4(CO3)2(aetpy)8](ClO4)4 from a spin-1 Heisenberg diamond cluster [0.0]
  Magnetic and magnetocaloric properties of a spin-1 Heisenberg diamond cluster are investigated. Spin-1 Heisenberg diamond cluster exhibits several intriguing quantum ground states. Spin-1 Heisenberg diamond cluster may also exhibit an enhanced magnetocaloric effect.
  arXiv  Detail & Related papers  (2020-10-06T07:22:11Z)
• Orbital and Spin Dynamics of Single Neutrally-Charged Nitrogen-Vacancy Centers in Diamond [0.0]
  We use resonant excitation of single centers to reveal the fine structure of the neutral charge state. We realize projective high-fidelity single-shot readout of the spin state.
  arXiv  Detail & Related papers  (2020-07-29T08:39:07Z)
• 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.