Robust Spin Polarization by Adiabatic Dynamical Decoupling

• URL: http://arxiv.org/abs/2506.08571v1
• Date: Tue, 10 Jun 2025 08:38:51 GMT
• Title: Robust Spin Polarization by Adiabatic Dynamical Decoupling
• Authors: Soham Pal, Oliver T. Whaites, Wolfgang Knolle, Tania S. Monteiro, Helena S. Knowles,
• Abstract summary: We demonstrate adiabatic pulsed nuclear spin polarization at room temperature in diamond.<n>We achieve enhanced polarization efficiency, a broad resonance window, and improved tolerance to hyperfine coupling uncertainties.
• Score: 0.31457219084519
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: High-fidelity multi-qubit initialization is vital for quantum simulation, quantum information processing (QIP), and quantum sensing. In diamond platforms, nuclear spin registers can be initialized through polarization transfer from a nearby electronic spin whose high gyromagnetic ratio enables efficient dynamical nuclear polarization (DNP). These hybrid systems are typically controlled using diabatic spin rotations, which require precise knowledge of all system parameters. Adiabatic DNP protocols on the other hand have less strict requirements and could enable robust and high fidelity spin transfer. However, due to the slow adiabatic sweeps and limited electron spin coherence times, this approach has remained inaccessible. Here, we demonstrate adiabatic pulsed nuclear spin polarization at room temperature in diamond. We achieve enhanced polarization efficiency, a broad resonance window, and improved tolerance to hyperfine coupling uncertainties relative to conventional diabatic pulsed protocols. We also show how this approach can benefit the initialization of spin clusters. These results set the scene for enhanced qubit initialization in solid state through adiabatic pulsed driving, with applications in solid-state quantum sensor and quantum memory technologies.

Related papers

• Robust and digital hyper-polarization protocol of nuclear spins via magic sequential sequence [6.689045763179738]
  Hyper-polarization of nuclear spins is crucial for advancing nuclear magnetic resonance (NMR) and quantum information technologies.<n>We introduce a sequential polarization protocol and identify a series of magic and digital sequences for hyper-polarizing nuclear spins.
  arXiv  Detail & Related papers  (2025-04-25T07:35:21Z)
• Hyperpolarisation Dynamics: Asymptotic Polarisation [0.0]
  We develop an analytical model to describe hyperpolarisation dynamics. We argue that perfect initialisation of a typical nuclear cluster may not, in general, be possible even with an arbitrarily large number of repetitions.
  arXiv  Detail & Related papers  (2024-04-11T09:11:42Z)
• 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)
• Controlling photon polarisation with a single quantum dot spin [0.0]
  We demonstrate the control of giant polarisation rotations induced by a single electron spin. We find that the polarisation state of the reflected photons can be manipulated in most of the Poincar'e sphere, through controlled spin-induced rotations. This control allows the operation of spin-photon interfaces in various configurations, including at zero or low magnetic fields.
  arXiv  Detail & Related papers  (2022-12-07T16:37:59Z)
• Rapidly enhanced spin polarization injection in an optically pumped spin ratchet [49.1301457567913]
  We report on a strategy to boost the spin injection rate by exploiting electrons that can be rapidly polarized. We demonstrate this in a model system of Nitrogen Vacancy center electrons injecting polarization into a bath of 13C nuclei in diamond. Through a spin-ratchet polarization transfer mechanism, we show boosts in spin injection rates by over two orders of magnitude.
  arXiv  Detail & Related papers  (2021-12-14T08:23:10Z)
• 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)
• Adiabatic Dynamical-Decoupling Based Control of Nuclear Spin Registers [0.0]
  We introduce a technique whereby adiabatic gates arise from the dynamical decoupling protocols that simultaneously extend coherence. We show that the technique enables polarisation, one-shot flips and state storage for nuclear spins.
  arXiv  Detail & Related papers  (2021-07-05T10:54:13Z)
• 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)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)
• Probing the coherence of solid-state qubits at avoided crossings [51.805457601192614]
  We study the quantum dynamics of paramagnetic defects interacting with a nuclear spin bath at avoided crossings. The proposed theoretical approach paves the way to designing the coherence properties of spin qubits from first principles.
  arXiv  Detail & Related papers  (2020-10-21T15:37:59Z)

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.