Quantum Register Based on Individual Electronic and Nuclear Spin Qubits in Diamond

Dutt, Meenakshi; Childress, Lilian; Jiang, Liang; Togan, Emre; Maze, J. R.; Jelezko, Fedor; Zibrov, A. S.; Hemmer, Philip; Lukin, Mikhail D.

doi:10.1126/science.1139831

Cited by 1,164 publications

(1,192 citation statements)

References 27 publications

Supporting

Mentioning

1,177

Contrasting

Unclassified

Order By: Relevance

“…To this end, we used graphene for the extraction of the excited-state energy of NV centres and converted it into a measurable electrical signal. We chose NV centres as the optical emitters because of their outstanding characteristics in terms of robustness, stability, spinphoton coupling, ease of spin manipulation 19 and spin coherence, which have allowed them to play a fundamental role in new quantum technologies: room-temperature quantum registers based on the NV spin [20][21][22] , spin-spin entanglement 23,24 , spinphoton entanglement 25 and single-photon emitters 26 , among others. Besides quantum-information processing, NV centres have also been used in metrology applications as extremely sensitive nanoscale magnetometers 27,28 and thermometers [29][30][31] .…”

mentioning

confidence: 99%

Ultrafast electronic readout of diamond nitrogen–vacancy centres coupled to graphene

et al. 2014

View full text Add to dashboard Cite

Non-radiative transfer processes are often regarded as loss channels for an optical emitter 1 because they are inherently difficult to access experimentally. Recently, it has been shown that emitters, such as fluorophores and nitrogen-vacancy centres in diamond, can exhibit a strong non-radiative energy transfer to graphene [2][3][4][5][6] . So far, the energy of the transferred electronic excitations has been considered to be lost within the electron bath of the graphene. Here we demonstrate that the transferred excitations can be read out by detecting corresponding currents with a picosecond time resolution 7,8 . We detect electronically the spin of nitrogen-vacancy centres in diamond and control the non-radiative transfer to graphene by electron spin resonance. Our results open the avenue for incorporating nitrogen-vacancy centres into ultrafast electronic circuits and for harvesting non-radiative transfer processes electronically.With the advancement of nanoscale photonics research it has become increasingly desirable to combine optical systems with electric circuits to create optoelectronic devices that can be miniaturized and integrated into chips. To this end, we can take advantage of the excellent optical and electronic properties of graphene 9 , which include good photodetection capabilities 8,10-15 , efficient energy absorption 3 and strong light-matter interactions at the nanoscale 16,17 . In particular, it has been reported recently that, because of graphene's specific properties, the near-field interaction between light emitters and graphene is greatly enhanced as compared to that of conventional metals 2-6 . This interaction manifests itself, for example, in a 100-fold enhancement of the excited-state decay rate of emitters placed 5 nm away from graphene as compared to the spontaneous emission of the emitter. The physical mechanism behind the interaction is the creation of an electron-hole pair in graphene through non-radiative energy transfer (NRET) from the emitter dipole 18 . The NRET process to graphene has been demonstrated to have an efficiency of nearly 100% when the emitter is less than 10 nm away from the graphene sheet 3 , which makes graphene an ideal material to detect electronically the optical properties of nearby emitters 6 . NRET has been studied extensively for fundamental as well as for biosensing applications. However, a fast energy transfer has not yet been observed because of quenching of the optical signal for short graphene-emitter distances. In contrast, an electronic readout of the NRET enables studies on fast energy processes. Moreover, if the transferred energy can be collected, as we show in this work, new ways for energy harvesting and biosensing can be implemented.We take advantage of the highly efficient NRET process to read out electronically, for the first time, the optical excitation of nitrogen-vacancy (NV) centres in diamond nanocrystals. To this end, we used graphene for the extraction of the excited-state energy of NV centres and converted it into a measurable ...

show abstract

mentioning

confidence: 99%

Ultrafast electronic readout of diamond nitrogen–vacancy centres coupled to graphene

et al. 2014

View full text Add to dashboard Cite

show abstract

“…After implementing the operators R ij and using Eqs. (15), (16), (17), and (18), we rewrite the total Hamiltonian of the system in a more convenient form…”

Section: A One-spin Casementioning

confidence: 99%

Entanglement dynamics of two nitrogen vacancy centers coupled by a nanomechanical resonator

Toklikishvili

Chotorlishvili

Mishra

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

In this paper we study the time evolution of the entanglement between two remote NV Centers (nitrogen vacancy in diamond) connected by a dual-mode nanomechanical resonator with magnetic tips on both sides. Calculating the negativity as a measure for the entanglement, we find that the entanglement between two spins oscillates with time and can be manipulated by varying the parameters of the system. We observed the phenomenon of a sudden death and the periodic revivals of entanglement in time. For the study of quantum decoherence, we implement a Lindblad master equation. In spite of its complexity, the model is analytically solvable under fairly reasonable assumptions, and shows that the decoherence influences the entanglement, the sudden death, and the revivals in time.

show abstract

“…It has been demonstrated in a great variety of quantum systems such as photon pairs [1,2], trapped ions [3], atomic ensembles [4,5] and nitrogen-vacancy centers [6,7]. Owing to the weak interactions, the creation of entanglement between neutral atoms in the ground state has to resort to the additional enhancement approaches, such as using a high-Q cavity to mediate the interaction between transient atoms [8] and controlling interatomic collisions by the optical lattice [9].…”

Section: Introductionmentioning

confidence: 99%

Deterministic entanglement generation between a pair of atoms on different Rydberg states via chirped adiabatic passage

Qian¹,

Zhang²

2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

Abstract. We develop a scheme for deterministic generation of an entangled state between two atoms on different Rydberg states via a chirped adiabatic passage, which directly connects the initial ground and target entangled states and also does not request the normally needed blockade effect. The occupancy of intermediate states suffers from a strong reduction via two pulses with proper time-dependent detunings and the electromagnetically induced transparency condition. By solving the analytical expressions of eigenvalues and eigenstates of a two-atom system, we investigate the optimal parameters for guaranteeing the adiabatic condition. We present a detailed study for the effect of pulse duration, changing rate, different Rydberg interactions on the fidelity of the prepared entangled state with experimentally feasible parameters, which reveals a good agreement between the analytic and full numerical results.

show abstract

Quantum Register Based on Individual Electronic and Nuclear Spin Qubits in Diamond

Cited by 1,164 publications

References 27 publications

Ultrafast electronic readout of diamond nitrogen–vacancy centres coupled to graphene

Ultrafast electronic readout of diamond nitrogen–vacancy centres coupled to graphene

Entanglement dynamics of two nitrogen vacancy centers coupled by a nanomechanical resonator

Deterministic entanglement generation between a pair of atoms on different Rydberg states via chirped adiabatic passage

Contact Info

Product

Resources

About