Multiphonon interactions between nitrogen-vacancy centers and nanomechanical resonators

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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“…the single spin dephasing rate [92][93][94]. We plot the time evolution of the spin squeezing parameter for N = 2, 4, 6, 8 spins in Fig.…”

Section: Steady State Entanglementmentioning

confidence: 99%

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

Qiao

Dong

et al. 2020

Phys. Rev. A

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“…And the second step is to prepare the Fock state of this phonon mode, which still remains a great challenge until now. Nevertheless, we are also sure about that a plenty of achievements on generating the Fock state will support our scheme to some extent 40‐48 . For this NV spin, we can initialize it into the dressed state | d ( g )⟩ with the assistance of the MW fields 32 …”

Section: The Basic Physical Mechanismmentioning

confidence: 94%

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry

Yang

Zhou

Lü

et al. 2021

Quantum Engineering

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A simple theoretical scheme with respect to preparing the maximum entanglement of a nitrogen‐vacancy (NV) spin and the quantized nanotubes carried with the tunable direct current is studied in this work. Basing on its inherent ℤ2 symmetry of the general Jaynes–Cummings model in this spin–phonon coupling system, two special adiabatic channels to bridge the initial discrete ground states and the final ground states with the maximum entanglement are discussed. To further supplement this scheme, we also discuss another equivalent and suitable setup, namely the NV spin and surface acoustic wave strong strain coupling scheme. Owing to adiabaticity, this scheme may be considered as an encouraged attempt for preparing the nonclassical state utilizing the systemic symmetry.

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“…The realization of the nonclassical states has become an interesting and important research topic in quantum information science, with potential applications in quantum communication [1], quantum metrology [2], quantum lithography [3], quantum spectroscopy [4,5], and quantum biology [6,7]. Recently, the generation of n-quanta states has been studied theoretically in multilevel atomic systems [8][9][10][11][12][13][14][15][16][17], Rydberg atomic ensembles [18,19], cavity quantum electrodynamics (QED) systems [20][21][22][23][24][25][26][27][28][29], circuit QED systems [30], waveguide QED systems [31][32][33], Kerr cavity systems [34,35], and cavity optomechanical systems [36].…”

Section: Introductionmentioning

confidence: 99%

Dynamical emission of phonon pairs in optomechanical systems

Zou,

Liao,

2021

Preprint

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Multiphonon state plays an important role in quantum information processing and quantum metrology. Here we propose a scheme to realize dynamical emission of phonon pairs based on the technique of stimulated Raman adiabatic passage in a single cavity optomechanical system, where the optical cavity is driven by two Gaussian pulse lasers. By exploring quantum trajectories of the state populations and the average phonon number, we find that the dynamical phonon-pair emission can be realized under the appropriate parameter conditions and is tunable by controlling the time interval between the consecutive pulses of pump lasers. In particular, the numerical results for the standard and generalized second-order correlation functions of the mechanical mode show that the system can behave as an antibunched phonon-pair emitter. Our proposal can be extended to achieve an antibunched n-phonon emitter, which has potential applications for on-chip quantum communications.

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Multiphonon interactions between nitrogen-vacancy centers and nanomechanical resonators

Cited by 25 publications

References 81 publications

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

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

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry

Dynamical emission of phonon pairs in optomechanical systems

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Multiphonon interactions between nitrogen-vacancy centers and nanomechanical resonators

Cited by 25 publications

References 81 publications

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

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

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z 2 symmetry

Dynamical emission of phonon pairs in optomechanical systems

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Product

Resources

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Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry