The formation of a nuclear-spin dark state in silicon

• URL: http://arxiv.org/abs/2405.14922v2
• Date: Wed, 07 May 2025 18:17:54 GMT
• Title: The formation of a 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.<n>The dark state significantly reduces the relaxation rate between the singlet and triplet electronic spin states.<n>This nuclear-spin dark state has potential applications as a quantum memory or in quantum sensing.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Silicon-based qubits are often made by trapping individual electrons in quantum dots defined by electric gates. Quantum information can then be stored using the spin states of the electrons. However, the nuclei of the surrounding atoms also have spin degrees of freedom that couple to the electron spin qubits and cause decoherence. The emergence of a nuclear-spin dark state has been predicted to reduce this coupling during dynamic nuclear polarization, when the electrons in the quantum dot drive the nuclei in the semiconductor into a decoupled state. Here, we report the formation of a nuclear-spin dark state in a gate-defined silicon double quantum dot. We show that, as expected, the transverse 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 reduces the relaxation rate between the singlet and triplet electronic spin states. This nuclear-spin dark state has potential applications as a quantum memory or in quantum sensing, and might enable increased polarization of nuclear spin ensembles.

Related papers

• Bipartite entanglement in a nuclear spin register mediated by a quasi-free electron spin [42.3174494827458]
  Quantum networks will rely on photons entangled to robust, local quantum registers for computation and error correction.<n>We demonstrate control of and entanglement in a fully connected three-qubit $13mathrmC$ nuclear spin register in diamond.
  arXiv  Detail & Related papers  (2025-08-07T10:45:14Z)
• 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)
• Bound state of distant photons in waveguide quantum electrodynamics [137.6408511310322]
  Quantum correlations between distant particles remain enigmatic since the birth of quantum mechanics. We predict a novel kind of bound quantum state in the simplest one-dimensional setup of two interacting particles in a box. Such states could be realized in the waveguide quantum electrodynamics platform.
  arXiv  Detail & Related papers  (2023-03-17T09:27:02Z)
• 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)
• Coherent control of a nuclear spin via interactions with a rare-earth ion in the solid-state [0.0]
  Individually addressed Er$3+$ ions in solid-state hosts are promising resources for quantum repeaters. While the Er$3+$ electron spin provides a spin-photon interface, ancilla nuclear spins could enable multi-qubit registers with longer storage times. We demonstrate coherent coupling between the electron spin of a single Er$3+$ ion and a single $I=1/2$ nuclear spin in the solid-state host crystal.
  arXiv  Detail & Related papers  (2022-09-12T21:44:21Z)
• 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)
• 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)
• Nuclear spin readout in a cavity-coupled hybrid quantum dot-donor system [0.0]
  Nuclear spins show long coherence times and are well isolated from the environment. We present a method for nuclear spin readout by probing the transmission of a microwave resonator.
  arXiv  Detail & Related papers  (2020-12-02T16:51:50Z)
• Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\ m{iPr5}}$)$_2$ single-molecule magnet [64.10537606150362]
  Both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
  arXiv  Detail & Related papers  (2020-07-31T01:48:57Z)
• 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.