Simulation of topological phases with color center arrays in phononic crystals

Li, Xiaoxiao; Li, Bo; Li, Pengbo

doi:10.1103/physrevresearch.2.013121

Cited by 31 publications

(8 citation statements)

References 87 publications

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“…These characters make SiV centers become an excellent candidate as quantum units, due to their favorable optical properties and flexible manipulation on the energy-level structures [67][68][69]. Moreover, it has been discussed that SiV centers can realize strong and tunable coupling to phonons at the single quantum level [70][71][72][73][74].…”

Section: Introductionmentioning

confidence: 99%

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Qiao

Dong

et al. 2020

Phys. Rev. A

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Multiparticle entanglement is of great significance for quantum metrology and quantum information processing. We here present an efficient scheme to generate stable multiparticle entanglement in a solid state setup, where an array of silicon-vacancy centers are embedded in a quasi-onedimensional acoustic diamond waveguide. In this scheme, the continuum of phonon modes induces a controllable dissipative coupling among the SiV centers. We show that, by an appropriate choice of the distance between the SiV centers, the dipole-dipole interactions can be switched off due to destructive interferences, thus realizing a Dicke superradiance model. This gives rise to an entangled steady state of SiV centers with high fidelities. The protocol provides a feasible setup for the generation of multiparticle entanglement in a solid state system.

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Section: Introductionmentioning

confidence: 99%

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Qiao

Dong

et al. 2020

Phys. Rev. A

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“…Solid defects in diamond including nitrogen-vacancy (NV) [31][32][33][34][35][36][37][38][39][40][41][42], silicon-vacancy (SiV) [43][44][45][46][47][48][49][50][51][52][53], and germanium-vacancy (GeV) [54] color centers have been extensively studied in recent years. They consist of a substitutional impurity atom replacing the carbon atom and adjacent to vacancies.…”

Section: Introductionmentioning

confidence: 99%

Dissipation-assisted preparation of steady spin-squeezed states of SiV centers

et al. 2021

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We propose an efficient scheme for generating spin-squeezed states at steady state in a spinmechanical hybrid system, where an ensemble of SiV centers are coupled to a strongly damped nanomechanical resonator. We show that, there exists a collective steady state in the system, which is exactly formed by the collective spin states plus the zero excitation state of the mechanical mode. The generation of the steady spin-squeezed state is based on a dissipative quantum dynamical process in which the mechanical dissipation plays a positive role but without destroying the target state. We demonstrate that the spin-squeezed steady state can be deterministically prepared via dissipative means, with the optimal spin squeezing up to 4/N in the ideal case, where N is the number of spins. This work provides a promising platform for quantum information processing and quantum metrology.

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“…The NV center exhibits long coherence time even at room temperature (T 2 ∼ ms) [53][54][55][56][57][58], and its spin and orbital degrees of freedom have been precisely controlled experimentally [59][60][61][62][63][64][65]. Since NV centers are sensitive to magnetic field and strain field, and can not only be indirectly coupled to NAMRs through magnetic tip [66][67][68][69], but also directly coupled by lattice strain [70][71][72][73][74]. A spin-mechanical system based on direct coupling may be more attractive because it avoids the emergence of extra decoherence by more components.…”

Section: Introductionmentioning

confidence: 99%

Collective radiance with NV centers coupled to nonlinear phononic waveguides

Chen¹,

Qiao²,

Dong³

et al. 2021

Preprint

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Collective radiance is a fundamental phenomenon in quantum optics. However, these radiation effects remain largely unexplored in the field of quantum acoustics. In this work, we investigate the supercorrelated radiation effects in a nonlinear phononic waveguide that is coupled with NV centers. When the spin's frequency is below the scattering continuum but within the bound-state band of the phonon waveguide, a single NV center dissipates slowly, but two NV centers can exhibit a rapid exponential decay. When multiple NV spins are considered, supercorrelated radiance occurs at a rate N times faster than Dicke superradiance. The peak of the state distribution in supercorrelated radiance jumps directly from |m = N/2 to |m = −N/2 , distinguished from the continuous shift of the peak in superradiance. This work provides deeper insight into the collective radiation effect and may find interesting applications in quantum information processing.

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Simulation of topological phases with color center arrays in phononic crystals

Cited by 31 publications

References 87 publications

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers

Dissipation-assisted preparation of steady spin-squeezed states of SiV centers

Collective radiance with NV centers coupled to nonlinear phononic waveguides

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