The nuclear-spin dark state in silicon

• URL: http://arxiv.org/abs/2405.14922v1
• Date: Thu, 23 May 2024 17:47:27 GMT
• Title: The nuclear-spin dark state in silicon
• Authors: Xinxin Cai, Habitamu Y. Walelign, John M. Nichol,
• Abstract summary: We report the formation of a nuclear-spin dark state in a gate-defined silicon double quantum dot. The dark state has been predicted to emerge during dynamic nuclear polarization when the electrons in the quantum dot drive the nuclei in the semiconductor into a decoupled state.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report the formation of a nuclear-spin dark state in a gate-defined silicon double quantum dot. The dark state has been predicted to emerge during dynamic nuclear polarization when the electrons in the quantum dot drive the nuclei in the semiconductor into a decoupled state. We show that, as expected, the electron-nuclear coupling rapidly diminishes in the dark state, and that this state depends on the synchronized precession of the nuclear spins. Moreover, the dark state significantly increases the lifetimes of electronic spin states. This nuclear-spin dark state could be used as a quantum memory or as a resource for quantum sensing, and further studies of the dark state may point the way toward increased polarization of nuclear spin ensembles.

Related papers

• Certifying the quantumness of a nuclear spin qudit through its uniform precession [28.4073170440133]
  We certify the quantumness of exotic states of a nuclear spin through its uniform precession. The experiment is performed on a single spin-7/2 $123$Sb nucleus implanted in a silicon nanoelectronic device.
  arXiv  Detail & Related papers  (2024-10-10T06:20:41Z)
• 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)
• Evidencing the squeezed dark nuclear spin state in lead halide perovskites [0.0]
  Coherent many-body states are highly promising for robust and scalable quantum information processing. Here, we demonstrate coherent optical manipulation of the nuclear spin ensemble in the lead halide perovskite semiconductor FAPbBr$_3$ (FA=formamidinium)
  arXiv  Detail & Related papers  (2023-01-26T23:11:32Z)
• Noise-resistant quantum memory enabled by Hamiltonian engineering [6.595632154520519]
  Nuclear spins in quantum dots are promising candidates for fast and scalable quantum memory. We introduce a noise-resistant protocol to realize fast and high-fidelity quantum memory through Hamiltonian engineering.
  arXiv  Detail & Related papers  (2023-01-02T09:31:08Z)
• Decoupling Nuclear Spins via Interaction-Induced Freezing in Nitrogen Vacancy Centers in Diamond [0.0]
  Nitrogen-Vacancy (NV) centers in diamonds provide a room-temperature platform for emerging quantum technologies. We demonstrate a freezing protocol for an NV center to isolate its intrinsic nuclear spin from a noisy electromagnetic environment.
  arXiv  Detail & Related papers  (2022-04-08T07:01:51Z)
• Effect of Emitters on Quantum State Transfer in Coupled Cavity Arrays [48.06402199083057]
  We study the effects of atoms in cavities which can absorb and emit photons as they propagate down the array. Our model is equivalent to previously examined spin chains in the one-excitation sector and in the absence of emitters.
  arXiv  Detail & Related papers  (2021-12-10T18:52:07Z)
• 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)
• Demonstration of electron-nuclear decoupling at a spin clock transition [54.088309058031705]
  Clock transitions protect molecular spin qubits from magnetic noise. linear coupling to nuclear degrees of freedom causes a modulation and decay of electronic coherence. An absence of quantum information leakage to the nuclear bath provides opportunities to characterize other decoherence sources.
  arXiv  Detail & Related papers  (2021-06-09T16:23:47Z)
• Emergent dark states from superradiant dynamics in multilevel atoms in a cavity [0.0]
  We find that multilevel atoms can harbour eigenstates that are perfectly dark to cavity decay even within the subspace of permutationally symmetric states (collective Dicke manifold) Remarkably, the superradiant decay of multilevel atoms can end up stuck in one of these dark states, where a macroscopic fraction of the atoms remains excited. This opens the door to the preparation of entangled dark states of matter through collective dissipation useful for quantum sensing and quantum simulation.
  arXiv  Detail & Related papers  (2021-05-31T18:00:01Z)
• Entanglement and control of single quantum memories in isotopically engineered silicon carbide [89.42372489576658]
  Nuclear spins in the solid state are both a cause of decoherence and a valuable resource for spin qubits. We demonstrate control of isolated 29Si nuclear spins in silicon carbide (SiC) to create an entangled state between an optically active divacancy spin and a strongly coupled nuclear register.
  arXiv  Detail & Related papers  (2020-05-15T15:45:34Z)
• Algorithmic Cooling of Nuclear Spin Pairs using a Long-Lived Singlet State [48.7576911714538]
  We show that significant cooling is achieved on an ensemble of spin-pair systems by exploiting the long-lived nuclear singlet state. This is the first demonstration of algorithmic cooling using a quantum superposition state.
  arXiv  Detail & Related papers  (2019-12-31T09:57:03Z)

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.