Characterizing temperature and strain variations with qubit ensembles for their robust coherence protection

Wang, Guoqing; Barr, Ariel Rebekah; Tang, Hao; Chen, Mo; Li, Changhao; Xu, Hao; Li, Ju; Cappellaro, Paola

doi:10.48550/arxiv.2205.02790

Cited by 4 publications

(10 citation statements)

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“…The thermal expansion contribution to the temperature shifts has an opposite slope with respect to the experiments. The dynamical phonon effect is more than one order of magnitude larger than the thermal expansion effects, so it corrects both the trend and the magnitude, obtain- ing dQ dT and dAzz dT in good agreement with the previous experiments [16,27,28,47].…”

supporting

confidence: 84%

“…Previously, experimental work on the temperature dependence of 13 C hyperfine interaction did not provide definite results due to the high noise, while their computational study did not consider the second-order dynamical phonon effect [29]. Our results provide a theoretical prediction for ν A (T ) of 13 C atoms in NV centers, which could be measured by the nuclear spin transition [47]. In the discussion above, we focus on the tempera-ture shift under thermal equilibrium, but the dynamical phonon effect on spin transition frequency can be extended to kinetic processes such as phonon transport.…”

mentioning

confidence: 61%

“…3(c). We note that the spectral correlation between different interactions can be quite accurate and paves the way to designing robust coherence protection protocols by refocusing one interaction variations using other correlated interactions over a broad range of temperatures [47].…”

mentioning

confidence: 93%

“…Therefore, we expect that the higher sensitivity of A zz than Q is also a general behavior in many other color centers. It has been recently proposed that with dAzz dQ > 1, the coherence time of nuclear spin qubits can be robustly protected by at least one order of magnitude through noise decoupling techniques [47]. The generality of the higher sensitivity of A zz indicates a broad applicability of such a method to various solid state spin defects.…”

mentioning

confidence: 99%

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First-principles Calculation of the Temperature-dependent Transition Energies in Spin Defects

Tang¹,

Barr²,

Wang³

et al. 2022

Preprint

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Spin qubits associated with color centers are promising platforms for various quantum technologies. However, to be deployed in robust quantum devices, the variations of their intrinsic properties with the external conditions, and in particular temperature, should be known with high precision. Unfortunately, a predictive theory on the temperature dependence of the resonance frequency of electron and nuclear spin defects in solids remains lacking. In this work, we develop a first-principles method for the temperature dependence of zero phonon line, zero-field splitting, hyperfine interaction, and nuclear quadrupole interaction of color centers. As a testbed, we compare our ab-initio calculation results with experiments in the Nitrogen-Vacancy (NV) center finding good agreement. Interestingly, we identify the major origin of temperature dependence as a second-order effect of phonon vibration. The method is generally applicable to different color centers and provides a theoretical tool for designing high-precision quantum sensors.

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supporting

confidence: 84%

mentioning

confidence: 61%

mentioning

confidence: 93%

mentioning

confidence: 99%

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First-principles Calculation of the Temperature-dependent Transition Energies in Spin Defects

Tang¹,

Barr²,

Wang³

et al. 2022

Preprint

Self Cite

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“…The dynamical phonon effect is more than 1 order of magnitude larger than the thermal-expansion effects, so it corrects both the trend and the magnitude, obtaining dQ dT and dA dT zz in good agreement with the previous experiments. 17,28,29,51 A zz is much more sensitive to T than Q. The sensitivity of A zz mainly comes from the Fermi contact term, which is highly sensitive to the atomic displacement in the dynamical phonon effects according to our calculations.…”

mentioning

confidence: 99%

First-Principles Calculation of the Temperature-Dependent Transition Energies in Spin Defects

Tang

Barr

Wang

et al. 2023

J. Phys. Chem. Lett.

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Spin qubits associated with color centers are promising platforms for various quantum technologies. However, to be deployed in robust quantum devices, the variations of their intrinsic properties with the external conditions, in particular temperature and strain, should be known with high precision. Unfortunately, a predictive theory on the temperature dependence of the resonance frequency of electron and nuclear spin defects in solids remains lacking. In this work, we develop a first-principles method for the temperature dependence of the zero-field splitting, hyperfine interaction, and nuclear quadrupole interaction of color centers. As a testbed, we compare our ab initio calculations with experiments for the nitrogen-vacancy (NV–) center in diamond, finding good agreements. We identify the major origin of the temperature dependence as a second-order effect of dynamic phonon vibrations, instead of the thermal-expansion strain. The method can be applied to different color centers and provides a theoretical tool for designing high-precision quantum sensors.

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Fast Wide‐Field Quantum Sensor Based on Solid‐State Spins Integrated with a SPAD Array

Wang

Madonini

et al. 2023

Adv Quantum Tech

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Achieving fast, sensitive, and parallel measurement of a large number of quantum particles is an essential task in building large‐scale quantum platforms for different quantum information processing applications such as sensing, computation, simulation, and communication. Current quantum platforms in experimental atomic and optical physics based on CMOS sensors and charged coupled device cameras are limited by either low sensitivity or slow operational speed. Here an array of single‐photon avalanche diodes is integrated with solid‐state spin defects in diamond to build a fast wide‐field quantum sensor, achieving a frame rate up to 100 kHz. The design of the experimental setup to perform spatially resolved imaging of quantum systems is presented. A few exemplary applications, including sensing DC and AC magnetic fields, temperature, strain, local spin density, and charge dynamics, are experimentally demonstrated using a nitrogen‐vacancy ensemble diamond sample. The developed photon detection array is broadly applicable to other platforms such as atom arrays trapped in optical tweezers, optical lattices, donors in silicon, and rare earth ions in solids.

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Characterizing temperature and strain variations with qubit ensembles for their robust coherence protection

Cited by 4 publications

References 0 publications

First-principles Calculation of the Temperature-dependent Transition Energies in Spin Defects

First-principles Calculation of the Temperature-dependent Transition Energies in Spin Defects

First-Principles Calculation of the Temperature-Dependent Transition Energies in Spin Defects

Fast Wide‐Field Quantum Sensor Based on Solid‐State Spins Integrated with a SPAD Array

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