Imaging mesoscopic nuclear spin noise with a diamond magnetometer

Meriles, Carlos A.; Jiang, Liang; Goldstein, Garry; Hodges, J. S.; Maze, J. R.; Lukin, Mikhail D.; Cappellaro, Paola

doi:10.1063/1.3483676

Cited by 111 publications

(126 citation statements)

References 18 publications

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“…Future research on DD will also consider applications outside QIP. Recent experiments have applied DD pulse sequences, for example, to probe the noise spectrum directly [69][70][71] and detect weak magnetic fields [72][73][74][75].…”

Section: Discussionmentioning

confidence: 99%

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Robust dynamical decoupling

Souza

Álvarez

Suter

2012

Phil. Trans. R. Soc. A.

193

194

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Quantum computers, which process information encoded in quantum mechanical systems, hold the potential to solve some of the hardest computational problems. A substantial obstacle for the further development of quantum computers is the fact that the lifetime of quantum information is usually too short to allow practical computation. A promising method for increasing the lifetime, known as dynamical decoupling (DD), consists of applying a periodic series of inversion pulses to the quantum bits. In the present review, we give an overview of this technique and compare different pulse sequences proposed earlier. We show that pulse imperfections, which are always present in experimental implementations, limit the performance of DD. The loss of coherence due to the accumulation of pulse errors can even exceed the perturbation from the environment. This effect can be largely eliminated by a judicious design of pulses and sequences. The corresponding sequences are largely immune to pulse imperfections and provide an increase of the coherence time of the system by several orders of magnitude.

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Section: Discussionmentioning

confidence: 99%

“…The DD technique is becoming an important tool for QIP [49,[54][55][56]59-67] as well as in spectroscopy [68][69][70][71] and imaging [72][73][74][75]. In most cases, the goal is to preserve a given input state, but it may also be combined with gate operations [76][77][78][79][80].…”

Section: Introductionmentioning

confidence: 99%

Robust dynamical decoupling

Souza

Álvarez

Suter

2012

Phil. Trans. R. Soc. A.

193

194

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“…A possible solution is to change the phase of the final pulse [37] (or equivalently, to introduce an additional, known phase accumulation during the free evolution). Then the signal becomes…”

Section: B Eam With No Polarization and Phase Errormentioning

confidence: 99%

Environment-assisted metrology with spin qubits

et al. 2012

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We investigate the sensitivity of a recently proposed method for precision measurement [Phys. Rev. Lett. 106, 140502 (2011)], focusing on an implementation based on solid-state spin systems. The scheme amplifies a quantum sensor response to weak external fields by exploiting its coupling to spin impurities in the environment. We analyze the limits to the sensitivity due to decoherence and propose dynamical decoupling schemes to increase the spin coherence time. The sensitivity is also limited by the environment spin polarization; therefore, we discuss strategies to polarize the environment spins and present a method to extend the scheme to the case of zero polarization. The coherence time and polarization determine a figure of merit for the environment's ability to enhance the sensitivity compared to echo-based sensing schemes. This figure of merit can be used to engineer optimized samples for high-sensitivity nanoscale magnetic sensing, such as diamond nanocrystals with controlled impurity density.

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“…The transient PL response of the NV center can be modeled using projective measurements. The operatorM describes the spin expectation value for a PL measurement [20],M = a|0 0| + b(|+1 +1| + |−1 −1|), where a and b are independent Poisson random variables. The fractional frequency deviation varies as the quantum observable,M for our state |ψ f according to…”

Section: Fig 2 (Color Online)mentioning

confidence: 99%

“…In order to evaluate this expression, we must know the observable signal-to-noise ratio for the NV measurement and follow the measurement operator described in [20] for the NV spin-dependent fluorescence readout. Let us take the measurement operator to bê…”

Section: Appendix B: Measurement and Sensitivitymentioning

confidence: 99%

Timekeeping with electron spin states in diamond

et al. 2013

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Frequency standards based on atomic states, such as Rb or Cs vapors, or single-trapped ions, are the most precise measures of time. Here we propose and analyze a precision oscillator approach based upon spins in a solid-state system, in particular, the nitrogen-vacancy defect in single-crystal diamond. We show that this system can have stability approaching portable atomic standards and is readily incorporable as a chip-scale device. Using a pulsed spin-echo technique, we anticipate an Allan deviation of σ y = 10 −7 τ −1/2 limited by thermally-induced strain variations; in the absence of such thermal fluctuations, the system is limited by spin dephasing and harbors an Allan deviation nearing ∼ 10 −12 τ −1/2 . Potential improvements based upon advanced diamond material processing, temperature stabilization, and nanophotonic engineering are discussed.

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Imaging mesoscopic nuclear spin noise with a diamond magnetometer

Cited by 111 publications

References 18 publications

Robust dynamical decoupling

Robust dynamical decoupling

Environment-assisted metrology with spin qubits

Timekeeping with electron spin states in diamond

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