High-speed quantum gates with cavity quantum electrodynamics

Su, Chun‐Hsu; Greentree, Andrew D.; Munro, William J.; Nemoto, Kae; Hollenberg, Lloyd C. L.

doi:10.1103/physreva.78.062336

Cited by 43 publications

(38 citation statements)

References 39 publications

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“…This is a major step towards the realization of integrated quantum optical devices. With the presented pick-and-place technique and the selective cavity tuning, even more complex systems, involving two cavities and emitters [33] can be assembled in a controlled way. Simple quantum gates, integrated on a single photonic crystal chip, are within reach.…”

Section: Resultsmentioning

confidence: 99%

Coupling of single nitrogen‐vacancy defect centers in diamond nanocrystals to optical antennas and photonic crystal cavities

Wolters

Kewes

Schell

et al. 2012

Physica Status Solidi (b)

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We demonstrate the ability to modify the emission properties and enhance the interaction strength of single-photon emitters coupled to nanophotonic structures based on metals and dielectrics. Assembly of individual diamond nanocrystals, metal nanoparticles, and photonic crystal cavities to metastructures is introduced. Experiments concerning controlled coupling of single defect centers in nanodiamonds to optical nanoantennas made of gold bowtie structures are reviewed. By placing one and the same emitter at various locations with high precision, a map of decay rate enhancements was obtained. Furthermore, we demonstrate the formation of a hybrid cavity quantum electrodynamics system in which a single defect center is coupled to a single mode of a gallium phosphite photonic crystal cavity.

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Section: Resultsmentioning

confidence: 99%

Coupling of single nitrogen‐vacancy defect centers in diamond nanocrystals to optical antennas and photonic crystal cavities

Wolters

Kewes

Schell

et al. 2012

Physica Status Solidi (b)

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“…Fourier transforms of the temporal profiles yield emission spectrums centered at the ZPL with effective linewidth of 0.15 nm (NE8) and 0.3 nm (SiV) at zero temperature. Although the pulse is non-Gaussian, techniques such as Stark tuning and Q-switching can be used to optimize pulse profiles [62,63,64,65] and improve photon indistinguishability. Next the full model is solved for different excitation parameters in Figs.…”

Section: Cavity-enhanced Diamond Centersmentioning

confidence: 99%

High-performance diamond-based single-photon sources for quantum communication

Greentree

Hollenberg

2009

Phys. Rev. A

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Quantum communication places stringent requirements on single-photon sources. Here we report a theoretical study of the cavity Purcell enhancement of two diamond point defects, the nickel-nitrogen (NE8) and silicon-vacancy (SiV) centers, for high-performance, near on-demand single-photon generation. By coupling the centers strongly to high-finesse optical photonic-bandgap cavities with modest quality factor Q = O(10 4 ) and small mode volume V = O(λ 3 ), these system can deliver picosecond single-photon pulses at their zero-phonon lines with probabilities of 0.954 (NE8) and 0.812 (SiV) under a realistic optical excitation scheme. The undesirable blinking effect due to transitions via metastable states can also be suppressed with O(10 −4 ) blinking probability. We analyze the application of these enhanced centers, including the previously-studied cavity-enhanced nitrogenvacancy (NV) center, to long-distance BB84 quantum key distribution (QKD) in fiber-based, openair terrestrial and satellite-ground setups. In this comparative study, we show that they can deliver performance comparable with decoy state implementation with weak coherent sources, and are most suitable for open-air communication.

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“…As we will see in the next section, this approach enables us to modify the pulse shape of the output photon. We note that the process is intrinsically reversible and therefore the switch can also couple a propagating single-photon field into the storage cavity for confinement [14].…”

Section: Q-switchingmentioning

confidence: 99%

“…State transfer [1,2,3,4,5,6,7], two-qubit gates [8,9,10,11,12,13,14] and entanglement generation [1,9,10,11,15,16,17,18] can all be realized through controlled coupling of spatially distant atoms. This can be achieved by connecting the cavities in which atomic qubits reside via an optical fiber [1].…”

Section: Introductionmentioning

confidence: 99%

Pulse shaping by coupled cavities: Single photons and qudits

Greentree

Munro

et al. 2009

Phys. Rev. A

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Dynamic coupling of cavities to a quantum network is of major interest to distributed quantum information processing schemes based on cavity quantum electrodynamics. This can be achieved by actively tuning a mediating atom-cavity system. In particular, we consider the dynamic coupling between two coupled cavities, each interacting with a two-level atom, realized by tuning one of the atoms. One atom-field system can be controlled to become maximally and minimally coupled with its counterpart, allowing high fidelity excitation confinement, Q-switching and reversible state transport. As an application, we first show that simple tuning can lead to emission of near-Gaussian single-photon pulses that is significantly different from the usual exponential decay in a passive cavity-based system. The influences of cavity loss and atomic spontaneous emission are studied in detailed numerical simulations, showing the practicality of these schemes within the reach of current experimental solid-state technology. We then show that when the technique is employed to an extended coupled-cavity scheme involving a multi-level atom, arbitrary temporal superposition of single photons can be engineered in a deterministic way.

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High-speed quantum gates with cavity quantum electrodynamics

Cited by 43 publications

References 39 publications

Coupling of single nitrogen‐vacancy defect centers in diamond nanocrystals to optical antennas and photonic crystal cavities

Coupling of single nitrogen‐vacancy defect centers in diamond nanocrystals to optical antennas and photonic crystal cavities

High-performance diamond-based single-photon sources for quantum communication

Pulse shaping by coupled cavities: Single photons and qudits

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