Control of individual electron-spin pairs in an electron-spin bath
- URL: http://arxiv.org/abs/2311.10110v2
- Date: Tue, 28 Nov 2023 09:36:52 GMT
- Title: Control of individual electron-spin pairs in an electron-spin bath
- Authors: H. P. Bartling, N. Demetriou, N. C. F. Zutt, D. Kwiatkowski, M. J.
Degen, S. J. H. Loenen, C. E. Bradley, M. Markham, D. J. Twitchen, T. H.
Taminiau
- Abstract summary: We show the coherent back-action of an individual NV center on an electron-spin bath.
We use it to detect, prepare and control the dynamics of a pair of bath spins.
Our experiment reveals the microscopic quantum dynamics that underlie the central spin decoherence.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The decoherence of a central electron spin due to the dynamics of a coupled
electron-spin bath is a core problem in solid-state spin physics. Ensemble
experiments have studied the central spin coherence in detail, but such
experiments average out the underlying quantum dynamics of the bath. Here, we
show the coherent back-action of an individual NV center on an electron-spin
bath and use it to detect, prepare and control the dynamics of a pair of bath
spins. We image the NV-pair system with sub-nanometer resolution and reveal a
long dephasing time ($T_2^* = 44(9)$ ms) for a qubit encoded in the
electron-spin pair. Our experiment reveals the microscopic quantum dynamics
that underlie the central spin decoherence and provides new opportunities for
controlling and sensing interacting spin systems.
Related papers
- Control of an environmental spin defect beyond the coherence limit of a central spin [79.16635054977068]
We present a scalable approach to increase the size of electronic-spin registers.
We experimentally realize this approach to demonstrate the detection and coherent control of an unknown electronic spin outside the coherence limit of a central NV.
Our work paves the way for engineering larger quantum spin registers with the potential to advance nanoscale sensing, enable correlated noise spectroscopy for error correction, and facilitate the realization of spin-chain quantum wires for quantum communication.
arXiv Detail & Related papers (2023-06-29T17:55:16Z) - 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) - Time-crystalline behavior in central-spin models with Heisenberg
interactions [0.0]
We show that time-crystalline behavior can arise in quantum central-spin systems with Heisenberg interactions.
Results pertain to any XXZ central-spin system, including hyperfine-coupled electron-nuclear systems in quantum dots or color centers.
arXiv Detail & Related papers (2023-03-02T01:25:31Z) - 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) - Electron Wave Spin in a Quantum Well [0.0]
We show that a stable circulating total current density exists inside the well with a donut shaped topography.
A spin value is modified by the confining geometry of the well.
A free electron Gaussian wavepacket is unstable and experiences quick decoherence.
arXiv Detail & Related papers (2022-03-17T16:50:36Z) - 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) - Ab initio Ultrafast Spin Dynamics in Solids [0.7874708385247353]
We present a first-principles real-time density-matrix approach based on Lindblad dynamics to simulate ultrafast spin dynamics for general solid-state systems.
We find that the electron-electron scattering is negligible at room temperature but becomes dominant at low temperatures for spin relaxation in n-type GaAs.
arXiv Detail & Related papers (2020-12-16T02:49:47Z) - Driven dynamics of a quantum dot electron spin coupled to bath of
higher-spin nuclei [0.0]
We study the interplay of optical driving and hyperfine interaction between an electron confined in a quantum dot and its surrounding nuclear spin environment.
We find that while hyperfine interactions drive dynamic nuclear polarization and mode-locking, quadrupolar couplings counteract these effects.
arXiv Detail & Related papers (2020-12-14T03:00:18Z) - Electrically tuned hyperfine spectrum in neutral
Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ 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) - Spin current generation and control in carbon nanotubes by combining
rotation and magnetic field [78.72753218464803]
We study the quantum dynamics of ballistic electrons in rotating carbon nanotubes in the presence of a uniform magnetic field.
By suitably combining the applied magnetic field intensity and rotation speed, one can tune one of the currents to zero while keeping the other one finite, giving rise to a spin current generator.
arXiv Detail & Related papers (2020-01-20T08:54:56Z)
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.