Observing coherence in an incoherent paramagnetic nitrogen spin bath

• URL: http://arxiv.org/abs/2311.18181v1
• Date: Thu, 30 Nov 2023 01:52:59 GMT
• Title: Observing coherence in an incoherent paramagnetic nitrogen spin bath
• Authors: R. M. Goldblatt, A. M. Martin, A. A. Wood
• Abstract summary: We use nitrogen-vacancy centers in diamond to measure the coherence of paramagnetic nitrogen defects (P1 centers) We detect coherent interactions between the P1 centers and a local bath of $13$C nuclear spins. Our work illustrates how the optically-dark P1 spins, despite being unpolarized, can be used to extract information from their local environment.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The unpolarized spin environment surrounding a central spin qubit is typically considered as an incoherent source of dephasing, however, precise characterization and control of the spin bath can yield a resource for storing and sensing with quantum states. In this work, we use nitrogen-vacancy (NV) centers in diamond to measure the coherence of optically-dark paramagnetic nitrogen defects (P1 centers) and detect coherent interactions between the P1 centers and a local bath of $^{13}$C nuclear spins. The dipolar coupling between the P1 centers and $^{13}$C nuclear spins is identified by signature periodic collapses and revivals in the P1 spin coherence signal. We then demonstrate, using a range of dynamical decoupling protocols, that the probing NV centers and the P1 spins are coupled to independent ensembles of $^{13}$C nuclear spins. Our work illustrates how the optically-dark P1 spins, despite being unpolarized, can be used to extract information from their local environment and offers new insight into the interactions within a many-body system.

Related papers

• Blueprint for efficient nuclear spin characterization with color center [0.0]
  Nuclear spins in solids offer a promising avenue for developing scalable quantum hardware. Characterising individual nuclear spins is quite cumbersome since the characterisation protocols may differ depending on the strength of the hyperfine coupling. We present a more straightforward approach for determining the hyperfine interactions among each nuclear and the electron spin.
  arXiv  Detail & Related papers  (2024-02-12T22:54:52Z)
• P1 center electron spin clusters are prevalent in type Ib diamond [0.18531599702807572]
  We use dynamic nuclear polarization (DNP) and pulsed electron paramagnetic resonance (EPR) techniques to study P1 centers. P1 centers serve as a polarization source for DNP quantum sensing and play a significant role in the relaxation of NV centers. We propose that room temperature $13$C DNP at high field, achievable through straightforward modifications to existing solution-state NMR systems, is a potent tool for evaluating and controlling diamond defects.
  arXiv  Detail & Related papers  (2023-11-09T14:26:33Z)
• Hyperpolarisation of nuclear spins: polarisation blockade [0.0]
  pulse-based protocols have been shown to efficiently transfer optically induced polarisation of the electron defect spin to surrounding nuclear spins. We find that whenever polarisation resonances of nuclear spins are near-degenerate with a blocking' spin, which is single spin with stronger off-diagonal coupling to the electronic central spin, they are displaced out of the central resonant region.
  arXiv  Detail & Related papers  (2023-09-07T15:02:54Z)
• 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)
• Decoupling of Spin Decoherence Paths near Zero Magnetic Field [0.0]
  We demonstrate a method to quantify and manipulate nuclear spin decoherence mechanisms that are active in zero to ultralow magnetic fields. The method should broaden the spectrum of hyperpolarized biomedical contrast-agent compounds and hyperpolarization procedures that are used near zero field.
  arXiv  Detail & Related papers  (2021-12-16T00:08:08Z)
• 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)
• 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)
• 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)
• Entanglement of dark electron-nuclear spin defects in diamond [0.0]
  We demonstrate the initialisation, control and entanglement of individual dark spins associated to multiple P1 centers. Results provide a proof-of-principle towards using dark electron-nuclear spin defects as qubits for quantum sensing, computation and networks.
  arXiv  Detail & Related papers  (2020-11-19T14:54:42Z)
• 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.