Coherent spin dynamics of hyperfine-coupled vanadium impurities in silicon carbide

• URL: http://arxiv.org/abs/2210.09942v1
• Date: Tue, 18 Oct 2022 15:46:05 GMT
• Title: Coherent spin dynamics of hyperfine-coupled vanadium impurities in silicon carbide
• Authors: Joop Hendriks, Carmem M. Gilardoni, Chris Adambukulam, Arne Laucht, and Caspar H. van der Wal
• Abstract summary: We show coherent spin dynamics of an ensemble of vanadium defects around a clock-transition. We find spin dephasing times up to 7.2 $mu$s, and via spin-echo studies coherence lifetimes that go well beyond tens of microseconds. Our findings are relevant for understanding a wide class of defects with similar energy scales and crystal symmetries.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Progress with quantum technology has for a large part been realized with the nitrogen-vacancy centre in diamond. Part of its properties, however, are nonideal and this drives research into other spin-active crystal defects. Several of these come with much stronger energy scales for spin-orbit and hyperfine coupling, but how this affects their spin coherence is little explored. Vanadium in silicon carbide is such a system, with technological interest for its optical emission at a telecom wavelength and compatibility with semiconductor industry. Here we show coherent spin dynamics of an ensemble of vanadium defects around a clock-transition, studied while isolated from, or coupled to neighbouring nuclear spins. We find spin dephasing times up to 7.2 $\mu$s, and via spin-echo studies coherence lifetimes that go well beyond tens of microseconds. We demonstrate operation points where strong coupling to neighbouring nuclear spins does not compromise the coherence of the central vanadium spin, which identifies how these can be applied as a coherent spin register. Our findings are relevant for understanding a wide class of defects with similar energy scales and crystal symmetries, that are currently explored in diamond, silicon carbide, and hexagonal boron nitride.

Related papers

• Chirality-induced emergent spin-orbit coupling in topological atomic lattices [0.0]
  We show that photonic excitations in pseudospin-1/2 atomic lattices exhibit an emergent spin-orbit coupling when the geometry is chiral. Our results demonstrate that chiral atom arrays are a robust platform for realizing spin-orbit coupled topological states of matter.
  arXiv  Detail & Related papers  (2023-11-15T19:00:13Z)
• Spin-orbit torque on nuclear spins exerted by a spin accumulation via hyperfine interactions [49.1574468325115]
  This article demonstrates that the hyperfine coupling, which consists of Fermi contact and dipolar interactions, can mediate the application of spin-orbit torques acting on nuclear spins. The reactions to the equilibrium and nonequilibrium components of the spin density is a torque on the nucleus with field-like and damping-like components. This nuclear spin-orbit torque is a step toward stabilizing and controlling nuclear magnetic momenta, in magnitude and direction, and realizing nuclear spintronics.
  arXiv  Detail & Related papers  (2023-05-21T08:05:23Z)
• Entanglement of the Ising-Heisenberg diamond spin-1/2 cluster in evolution [0.0]
  We consider the evolution of entanglement in the diamond spin-1/2 cluster. The influence of the interaction coupling with side spins on the entanglement of central spins is investigated. We find conditions for achieving the maximal values of entanglement.
  arXiv  Detail & Related papers  (2023-03-28T13:14:25Z)
• 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)
• Quantum control of nuclear spin qubits in a rapidly rotating diamond [62.997667081978825]
  Nuclear spins in certain solids couple weakly to their environment, making them attractive candidates for quantum information processing and inertial sensing. We demonstrate optical nuclear spin polarization and rapid quantum control of nuclear spins in a diamond physically rotating at $1,$kHz, faster than the nuclear spin coherence time. Our work liberates a previously inaccessible degree of freedom of the NV nuclear spin, unlocking new approaches to quantum control and rotation sensing.
  arXiv  Detail & Related papers  (2021-07-27T03:39:36Z)
• Chiral control of quantum states in non-Hermitian spin-orbit-coupled fermions [6.928292647332275]
  We implement dissipative spin-orbit-coupled bands filled with ultracold fermions. We observe parity-time symmetry breaking as a result of the competition between the spin-orbit coupling and dissipation. This demonstrates that we can explore non-Hermitian topological states with spin-orbit coupling.
  arXiv  Detail & Related papers  (2021-06-09T07:55:17Z)
• 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)
• Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II) [52.259804540075514]
  We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
  arXiv  Detail & Related papers  (2021-03-04T13:31:40Z)
• 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.