Polarizing the electronic and nuclear spin of the NV-center in diamond in arbitrary magnetic fields: analysis of the optical pumping process

Chakraborty, Tanmoy; Zhang, Jingfu; Suter, Dieter

doi:10.1088/1367-2630/aa7727

Cited by 37 publications

(39 citation statements)

References 45 publications

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“…Examples where this mechanism generates high spin polarisation include organic molecules like pentacene (Kothe et al, 2010;Iinuma et al, 2000) or quinoxaline(von Borczyskowski and Boroske, 1978), oxygen-vacancy complexes in silicon (Itahashi et al, 2013) and the NV-center in diamond (Doherty et al, 2013;Suter and Jelezko, 2017;Ajoy et al, 2018a, b;Zangara et al, 2019;Chakraborty et al, 2017). Similar processes are responsible for the polarisation of spins in quartet states that undergo ISC to doublet states, such as some defects in SiC (Baranov et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Optical Detection of Magnetic Resonance

Suter¹

2020

Preprint

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Abstract. The combination of magnetic resonance with laser spectroscopy provides some interesting options for increasing the sensitivity and information content of magnetic resonance. This review covers the basic physics behind the relevant processes, such as angular momentum conservation during absorption and emission. This can be used to enhance the polarization of the spin system by orders of magnitude compared to thermal polarisation as well as for detection with sensitivities down to the level of individual spins. These fundamental principles have been used in many different fields. This review summarises some of the examples in different physical systems, including atomic and molecular systems, dielectric solids composed of rare earth and transition metal ions and semiconductors.

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Section: Discussionmentioning

confidence: 99%

Optical Detection of Magnetic Resonance

Suter¹

2020

Preprint

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“…Thus diamond, as a host, ensures that NV centers can be considered as isolated quantum systems, where the long lived electronic and nuclear spins associated with NV can act as a quantum register [19]. Several experiments demonstrated local control of the NV spins with high fidelity through initialization, coherent manipulation and read out using optical, microwave (MW), and radio frequency (RF) pulses [19][20][21][22]. Often for quantum operations, hybrid spin register associated with NVs are exploited [19,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Optimization of a quantum control sequence for initializing an NV spin register

Chakraborty,

Zhang,

Suter

2021

Preprint

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Implementation of many quantum information protocols require an efficient initialization of the quantum register. In the present report, we optimize a population trapping protocol for initializing a hybrid spin register associated a single nitrogen vacancy (NV) center in diamond. We initialize the quantum register by polarizing the electronic and the nuclear spins of the NV with a sequence of microwave, radio-frequency and optical pulses. We use a rate equation model to explain the distribution of population under the effect of the optical pulses. The model is compared to the experimental data obtained by performing partial quantum state tomography. To further increase the spin polarisation, we propose a recursive protocol with optimized optical pulses.

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“…This work includes isotope purification to eliminate elements with nonzero spins [10,11] and spin polarization. The latter can be obtained by application of high magnetic fields [12,13], very low temperatures [14], or optical pumping [15]. Another approach is to decouple the optically addressable spins from the bath by using clock transitions that are insensitive to magnetic-field fluctuations at first order [16][17][18] or by filtering out bath fluctuations by dynamical techniques [19,20].…”

Section: Introductionmentioning

confidence: 99%

Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal

et al. 2020

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Optically addressable spins are actively investigated in quantum communication, processing, and sensing. Optical and spin coherence lifetimes, which determine quantum operation fidelity and storage time, are often limited by spin-spin interactions, which can be decreased by polarizing spins. Spin polarization can be achieved using optical pumping, large magnetic fields, or mK-range temperatures. Here, we show that optical pumping of a small fraction of ions with a fixed-frequency laser, coupled with spin-spin interactions and spin diffusion, leads to substantial spin polarization in a paramagnetic rare-earth doped crystal, 171 Yb 3þ ∶Y 2 SiO 5. Indeed, more than 90% spin polarization has been achieved at 2 K and zero magnetic field. Using this spin polarization mechanism, we further demonstrate an increase in optical coherence lifetime from 0.3 ms to 0.8 ms, due to a strong decrease in spin-spin interactions. This effect opens the way to new schemes for obtaining long optical and spin coherence lifetimes in various solid-state systems such as ensembles of rare-earth ions or color centers in diamond, which are of interest for a broad range of quantum technologies.

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Polarizing the electronic and nuclear spin of the NV-center in diamond in arbitrary magnetic fields: analysis of the optical pumping process

Cited by 37 publications

References 45 publications

Optical Detection of Magnetic Resonance

Optical Detection of Magnetic Resonance

Optimization of a quantum control sequence for initializing an NV spin register

Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal

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