Room-Temperature Quantum Bit Memory Exceeding One Second

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. I.; Lukin, Mikhail D.

doi:10.1126/science.1220513

Cited by 830 publications

(829 citation statements)

References 37 publications

Supporting

Mentioning

799

Contrasting

Unclassified

Order By: Relevance

“…Neutron scattering requires the growth of large, high purity single-crystal samples, and is an ensemble-averaged measurement. There is therefore a significant opportunity to develop a real-space, non-invasive magnetic sensor capable of studying magnetic order at sub-10 nm spatial resolution and sub-T/Hz DC field sensitivities.The nitrogen vacancy (NV) defect center in diamond is an exceptionally versatile single spin system with unique quantum properties that have driven its application in diverse areas ranging from quantum information and photonics to quantum metrology [10][11][12][13][14][15][16][17][18][19] . Cryogenic scanning magnetometry stands out as potentially the most impactful application of NV centers, taking advantage of the exquisite magnetic field sensitivity and intrinsic atomic scale of the NV center for high resolution imaging 20 .…”

mentioning

confidence: 99%

Scanned probe imaging of nanoscale magnetism at cryogenic temperatures with a single-spin quantum sensor

et al. 2016

View full text Add to dashboard Cite

High spatial resolution magnetic imaging has driven important developments in fields ranging from materials science to biology. However, to uncover finer details approaching the nanoscale with greater sensitivity requires the development of a radically new sensor technology. The nitrogenvacancy (NV) defect in diamond has emerged as a promising candidate for such a sensor based on its atomic size and quantum-limited sensing capabilities afforded by long spin coherence times. Although the NV center has been successfully implemented as a nanoscale scanning magnetic probe at room temperature, it has remained an outstanding challenge to extend this capability to cryogenic temperatures, where many solid-state systems exhibit non-trivial magnetic order. Here we present NV magnetic imaging down to 6 K with 6 nm spatial resolution and 3 μT/√Hz field sensitivity, first benchmarking the technique with a magnetic hard disk sample, then utilizing the technique to image vortices in the iron pnictide superconductor BaFe2(As0.7P0.3)2 with Tc = 30 K. The expansion of NVbased magnetic imaging to cryogenic temperatures represents an important advance in state-of-theart magnetometry, which will enable future studies of heretofore inaccessible nanoscale magnetism in condensed matter systems. and Lorentz transmission electron microscopy (TEM) 7 , and reciprocal space techniques including neutron scattering 8 have been successfully utilized to study magnetism in these systems. However, each of these techniques has limitations that must be considered. In MFM, a ferromagnetic tip must be placed in close proximity to a sample, which can perturb the magnetic order that is being probed.Scanning SQUIDs typically require a probe temperature of 10 K or lower, and generally offer micron-size spatial resolution, although recent studies have enhanced the resolution to submicron scales 9 . Lorentz TEM can provide images with high spatial resolution and magnetic contrast, but requires very thin samples, typically less than 100 nm thick. Neutron scattering requires the growth of large, high purity single-crystal samples, and is an ensemble-averaged measurement. There is therefore a significant opportunity to develop a real-space, non-invasive magnetic sensor capable of studying magnetic order at sub-10 nm spatial resolution and sub-T/Hz DC field sensitivities.The nitrogen vacancy (NV) defect center in diamond is an exceptionally versatile single spin system with unique quantum properties that have driven its application in diverse areas ranging from quantum information and photonics to quantum metrology [10][11][12][13][14][15][16][17][18][19] . Cryogenic scanning magnetometry stands out as potentially the most impactful application of NV centers, taking advantage of the exquisite magnetic field sensitivity and intrinsic atomic scale of the NV center for high resolution imaging 20 . The operation of an NV-based magnetic probe is dependent on a fundamentally different sensing principle than other imaging methods, namely the spin-dependent photolum...

show abstract

mentioning

confidence: 99%

Scanned probe imaging of nanoscale magnetism at cryogenic temperatures with a single-spin quantum sensor

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Among these systems, the nitrogen-vacancy (NV) centers in diamond exhibit a set of particularly desirable features: individual centers can be initialized and read out optically, 1-4 possess naturally long coherence times even at room temperature, [5][6][7] and can be controlled 8 using magnetic fields, 9-12 optical excitations, [13][14][15][16][17] and electric fields. [18][19][20] As a result, the NV centers have attracted much attention as prospective qubits for quantum information processing, 4,7,15,16,[21][22][23][24][25] and as nanoscale sensors. 20,[26][27][28][29][30][31][32][33][34][35][36][37][38] Efficiency of the NV-based devices critically depends on the NV spin coherence time, which is controlled by the coupling to the spins of substitutional nitrogen atoms and/or to the bath of 13 C nuclear spins.…”

Section: Introductionmentioning

confidence: 99%

Decay of the rotary echoes for the spin of a nitrogen-vacancy center in diamond

Mkhitaryan

Dobrovitski

2014

Phys. Rev. B

View full text Add to dashboard Cite

We study dynamics of the electron spin of a nitrogen-vacancy (NV) center subjected to a strong driving field with periodically reversed direction (train of rotary echoes). We use analytical and numerical tools to analyze in detail the form and timescales of decay of the rotary echo train, modeling the decohering spin environment as a random magnetic field. We demonstrate that the problem can be exactly mapped onto a model of spin 1 coupled to a single bosonic mode with imaginary frequency. This mapping allows comprehensive analytical investigation beyond the standard BlochRedfield-type approaches. We explore the decay of the rotary echo train under assumption of strong driving, and identify the most important regimes of the decay. The analytical results are compared with the direct numerical simulations to confirm quantitative accuracy of our study. We present the results for realistic environment of substitutional nitrogen atoms (P1 centers), and provide a simplified but accurate description for decay of the rotary echo train of the NV center's spin. The approach presented here can also be used to study decoherence and longitudinal relaxation of other spin systems under conditions of strong driving.

show abstract

“…Herein, one can reversibly transfer the cavity mode excitation to the long-lived atomic/spin coherence (for example on the hyperfine sublevels of a NV-center [36,37,38,39,40]) by applying an additional resonant laser field.…”

mentioning

confidence: 99%

All-optical photon echo on a chip

Moiseev¹,

Моисеев²

2016

Laser Phys. Lett.

View full text Add to dashboard Cite

Abstract. We demonstrate that a photon echo can be implemented by alloptical means using an array of on-chip high-finesse ring cavities whose parameters are chirped in such a way as to support equidistant spectra of cavity modes. When launched into such a system, a classical or quantum optical signal -even a single-photon field -becomes distributed between individual cavities, giving rise to prominent coherence echo revivals at well-defined delay times, controlled by the chirp of cavity parameters. This effect enables long storage times for highthroughput broadband optical delay and quantum memory. All-optical photon echo and memory on a chip 2 Abstract. We demonstrate that a photon echo can be implemented by all-optical means using an array of on-chip highfinesse ring cavities whose parameters are chirped in such a way as to support equidistant spectra of cavity modes. When launched into such a system, a classical or quantum optical signal -even a single-photon field -becomes distributed between individual cavities, giving rise to prominent coherence echo revivals at well-defined delay times, controlled by the chirp of cavity parameters. This effect enables long storage times for high-throughput broadband optical delay and quantum memory.A photon echo [1, 2] is a broad class of optical phenomena where a coherence induced in a quantum system by an optical field is emitted in a form of a well-resolved intense optical signal, similar to the spin echo in nuclear magnetic resonance. Over decades, photon echo has been in use as a powerful method of coherent spectroscopy, providing unique information on transient processes in gases, liquid, and solids [3]. Photon-echo revivals in molecular rotational coherences have been shown to enable efficient quantum control of molecular alignment [4], photochemical reactions [5], as well as synthesis of ultrashort field waveforms [6]. In the era of quantum information, photon echo is viewed as a promising strategy for quantum data storage and quantum memories [7,8,9, 10] (recent reviews see also in [11,12,13,14]).Here, we show that a photon echo can be implemented by purely optical means using an array of on-chip high-finesse ring cavities whose parameters are chirped in such a way as to support equidistant spectra of cavity modes. A classical or quantum optical signal launched into such a system becomes distributed between individual cavities, giving rise to prominent coherence echo revivals at well-defined delay times, controlled by the chirp of cavity parameters. This effect enables long storage times for high-throughput broadband optical delay and quantum memory.We consider an array of N single-mode highfinesse chirped cavities with an equidistant spectrum of modes with a mode spacing ∆ (Fig. 1). An optical field coupled into such an array remains distributed between the cavities until all the cavity modes can re-emit in phase, giving rise to an intense photon-echo signals at the output. With appropriate coupling between the nanofiber and the cavities, which is possible, e.g....

show abstract

Room-Temperature Quantum Bit Memory Exceeding One Second

Cited by 830 publications

References 37 publications

Scanned probe imaging of nanoscale magnetism at cryogenic temperatures with a single-spin quantum sensor

Scanned probe imaging of nanoscale magnetism at cryogenic temperatures with a single-spin quantum sensor

Decay of the rotary echoes for the spin of a nitrogen-vacancy center in diamond

All-optical photon echo on a chip

Contact Info

Product

Resources

About