Quantum Information Processing with NV centers at Room Temperature

Maurer, Peter; Kucsko, Georg; Latta, Christian; Jiang, Liang; Yao, Norman Y.; Bennett, Steven; Pastawski, Fernando; Hunger, David; Chisholm, Nicholas; Markham, Matthew; Twitchen, Daniel J.; Cirac, J. Ignacio; Lukin, Mikhail D.

doi:10.1364/ls.2013.lth1g.4

Cited by 10 publications

(15 citation statements)

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“…It can be attributed to other impurities or defects [41]. In other words, if these 4 impurities or defects could be removed and if 12 C could be enriched, T 2 in n-type diamond should 5 become comparable to the long (millisecond order) T 2 of high-quality intrinsic 12 C-enriched 6 diamond [13,42]. 7…”

Section: Figures 4(c) and 4(d) Show The Accumulated Pl Intensitymentioning

confidence: 99%

Pure negatively charged state of the NV center inn-type diamond

et al. 2016

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17Optical illumination to negatively charged nitrogen-vacancy centers (NV − ) inevitably causes 18 stochastic charge-state transitions between NV − and neutral charge state of the NV center.It limits the 19 steady-state-population of NV − to 5% at minimum (~610 nm) and 80% (~532 nm) at maximum in 20 intrinsic diamond depending on the wavelength.. Here, we show Fermi level control by phosphorus 21 doping generates 99.4 ± 0.1% NV − under 1 μW and 593 nm excitation which is close to maximum 22 absorption of NV − . The pure NV − shows a five-fold increase of luminescence and a four-fold 23 enhancement of an optically detected magnetic resonance under 593 nm excitation compared with 24 those in intrinsic diamond. 25 26 27

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Section: Figures 4(c) and 4(d) Show The Accumulated Pl Intensitymentioning

confidence: 99%

Pure negatively charged state of the NV center inn-type diamond

et al. 2016

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“…The nominal parameter values used in our numerical results are as follows. We set the coherence time of electron and nuclear spins as τ e = 10 ms and τ n = 1 s, respectively, which is achievable in practice [36,43,44]. The detector efficiency is set as η d = 0.9 [45] and the distribution time for next-to-each-other electronelectron entanglement is set to T s = 1 µs.…”

Section: Qkd Performancementioning

confidence: 99%

Quantum repeaters with encoding on nitrogen-vacancy center platforms

Jing,

Razavi

2021

Preprint

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We investigate the explicit implementation of quantum repeater protocols that rely on threequbit repetition codes using nitrogen-vacancy (NV) centers in diamond as quantum memories. NV centers offer a two-qubit register, corresponding to their electron and nuclear spins, which makes it possible to perform deterministic two-qubit operations within one NV center. For quantum repeater applications, we however need to do joint operations on two separate NV centers. Here, we study two NV-based repeater structures that enable such deterministic joint operations. One structure offers less consumption of classical communication, hence is more resilient to decoherence effects, whereas the other one relies on fewer numbers of physical resources and operations. We assess and compare their performance for the task of secret key generation under the influence of noise and decoherence with current and near-term experimental parameters. We quantify the regimes of operation, where one structure outperforms the other, and find the regions where encoded QRs offer practical advantages over their non-encoded counterparts.

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“…These nuclear spins generally have an even longer coherence time compared to the electronic spin due to decreased interaction strength with the environment. As a result, single nuclear spin interactions have been used to great effect, for example extending the overall qubit lifetime [16] and performing unconditional quantum teleportation [17], while coupling with multiple nuclear spins has enabled demonstrations of quantum error correction [18]. 13…”

Section: Structure and Propertiesmentioning

confidence: 99%

“…However, the most promising defect center results have come from using single-crystal, inherently low strain samples [2,[15][16][17][18][19]41]. One might then reasonably question the applicability of our technique towards future quantum technologies.…”

Section: Platform Viabilitymentioning

confidence: 99%

Super-Resolution Localization and Readout of Individual Solid State Qubits

Bersin

Walsh

Mouradian

et al. 2018

Conference on Lasers and Electro-Optics

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A central goal in quantum information science is to establish entanglement across multiple quantum memories in a manner that allows individual control and readout of each constituent qubit. In the area of solid state quantum optics, a leading system is the negatively charged nitrogen vacancy center in diamond, which allows access to a spin center that can be entangled to multiple nuclear spins. Scaling these systems will require the entanglement of multiple NV centers, together with their nuclear spins, in a manner that allows for individual control and readout. Here we demonstrate a technique that allows us to prepare and measure individual centers within an ensemble, well below the diffraction limit. The technique relies on optical addressing of spin-dependent transitions, and makes use of the built-in inhomogeneous distribution of emitters resulting from strain splitting to measure individual spins in a manner that is non-destructive to the quantum state of other nearby centers. We demonstrate the ability to resolve individual NV centers with subnanometer spatial resolution. Furthermore, we demonstrate crosstalk-free individual readout of spin populations within a diffraction limited spot by performing resonant readout of one NV during a spectroscopic sequence of another. This method opens the door to multi-qubit coupled spin systems in solids, with individual spin manipulation and readout.

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Quantum Information Processing with NV centers at Room Temperature

Cited by 10 publications

References 0 publications

Pure negatively charged state of the NV center inn-type diamond

Pure negatively charged state of the NV center inn-type diamond

Quantum repeaters with encoding on nitrogen-vacancy center platforms

Super-Resolution Localization and Readout of Individual Solid State Qubits

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