Estimation of nuclear polarization via discrete measurement of NV center spin evolution

• URL: http://arxiv.org/abs/2401.03916v1
• Date: Mon, 8 Jan 2024 14:24:04 GMT
• Title: Estimation of nuclear polarization via discrete measurement of NV center spin evolution
• Authors: Mateusz Kuniej and Katarzyna Roszak
• Abstract summary: We propose a method for the estimation of the initial polarization of spinful nuclei of the $13C$ isotope in diamond. Existing polarization measurement methods are difficult to implement experimentally, because they require direct interference in the environment of the qubit. We exemplify the operation of the scheme on a realistic, randomly generated environment of eight nuclear spins.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a method for the estimation of the initial polarization of spinful nuclei of the ${}^{13}C$ isotope in diamond via a measurement of the evolution of the coherence of an NV center spin qubit. Existing polarization measurement methods are difficult to implement experimentally, because they require direct interference in the environment of the qubit. Here, in order to obtain the information, it is necessary to measure the qubit coherence at certain points of time, which are unambiguously determined by the applied magnetic field. For sufficiently high magnetic fields, the minimum value of the measured coherence constitutes an upper bound on the product of the initial polarizations of each environmental spin. The most significant advantage of the method, which allows to infer initial values of nuclear polarizations without any direct access to the environment, lies in its simplicity and the small amount of experimental resources that it requires. We exemplify the operation of the scheme on a realistic, randomly generated environment of eight nuclear spins, obtaining a reasonably accurate estimation of the initial polarization.

Related papers

• Pentacene-Doped Naphthalene for Levitated Optomechanics [0.8192907805418583]
  We introduce pentacene-doped naphthalene as a material for diamagnetic levitation, offering compelling applications in matter-wave interferometry and nuclear magnetic resonance. Pentacene-doped naphthalene offers remarkable polarizability of its nuclear spin ensemble, achieving polarization rates exceeding 80 % at cryogenic temperatures.
  arXiv  Detail & Related papers  (2024-05-22T17:51:54Z)
• A Universal Method to Generate Hyperpolarisation in Beams and Samples [0.0]
  We show that the quantum interference of transitions induced by radio-wave pumping with longitudinal and radial pulses are able to produce large polarisations at small magnetic fields. This technique opens the door for a new generation of polarised tracers, possibly low-field MRI with better spatial resolution or the production of polarised fuel to increase the efficiency of fusion reactors.
  arXiv  Detail & Related papers  (2023-11-10T10:20:50Z)
• Sensing of magnetic field effects in radical-pair reactions using a quantum sensor [50.591267188664666]
  Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades. We employ elaborate and realistic models of radical-pairs, considering its coupling to the local spin environment and the sensor. For two model systems, we derive signals of MFE detectable even in the weak coupling regime between radical-pair and NV quantum sensor.
  arXiv  Detail & Related papers  (2022-09-28T12:56:15Z)
• Estimating the concentration of chiral media with bright squeezed light [77.34726150561087]
  We quantify the performance of Gaussian probes in estimating the concentration of chiral analytes. Four-fold precision enhancement is achievable using state-of-the-art squeezing levels and intensity measurements.
  arXiv  Detail & Related papers  (2022-08-21T17:18:10Z)
• Measurement-induced nuclear spin polarization [0.0]
  Protocol works in a spin-star configuration, where the central spin is coupled to the surrounding bath (nuclear) spins by flip-flop interaction of equal strength. Nondeterministic nuclear spin polarization could be implemented by entropy reduction through measurement.
  arXiv  Detail & Related papers  (2022-08-19T01:35:23Z)
• 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)
• Hyperpolarisation of external nuclear spins using nitrogen-vacancy centre ensembles [0.0]
  We present evidence for a polarising interaction between a shallow NV ensemble and external nuclear targets over a micrometre scale. We find that our results suggest implementation of this technique for NMR sensitivity enhancement is feasible following realistic diamond material improvements.
  arXiv  Detail & Related papers  (2021-01-29T00:02:40Z)
• Maximising Dynamic Nuclear Polarisation via Selective Hyperfine Tuning [0.0]
  We show that for systems of electronic spin $Sgeq1$ possessing an intrinsic zero-field splitting, a separate class of stronger hyperfine interactions may be utilised to improve DNP efficiency and yield. We analytically review existing methods, and determine that this approach increases the rate of polarisation transfer to the nuclear ensemble by up to an order of magnitude over existing techniques.
  arXiv  Detail & Related papers  (2020-12-23T06:19:15Z)
• A multiconfigurational study of the negatively charged nitrogen-vacancy center in diamond [55.58269472099399]
  Deep defects in wide band gap semiconductors have emerged as leading qubit candidates for realizing quantum sensing and information applications. Here we show that unlike single-particle treatments, the multiconfigurational quantum chemistry methods, traditionally reserved for atoms/molecules, accurately describe the many-body characteristics of the electronic states of these defect centers.
  arXiv  Detail & Related papers  (2020-08-24T01:49:54Z)
• 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.