Extreme spin squeezing in the steady state of a generalized Dicke model

Masson, Stuart J.; Parkins, Scott

doi:10.1103/physreva.99.023822

Cited by 18 publications

(10 citation statements)

References 73 publications

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“…Thus, we can engineer these SiV spins to a steady entangled state. By suitably choosing the distances of SiV centers, the dipole-dipole interactions will vanish due to destructive interferences [77][78][79], and we can achieve a dissipative Dicke supperradiant [80] model in this setup [81,82]. This scheme provides a promising avenue for the generation of many-body entanglement at the steady state in solid-state setups.…”

Section: Introductionmentioning

confidence: 95%

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: 95%

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

Qiao

Dong

et al. 2020

Phys. Rev. A

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“…1(b), where each atom has two ground states |↓ and |↑ , and two excited states |l and |r with bare frequencies ω l and ω r with respect to the frequency of |↓ . Note that the correct couplings with the cavity and classical fields can be accomplished in physical systems using hyperfine split states [56,57], states in different hyperfine manifolds [46,[58][59][60], or with two-component Bose-Einstein condensates [61,62].…”

Section: Collective Spin-flip Modelmentioning

confidence: 99%

Adiabatic Control of Decoherence-Free-Subspaces in an Open Collective System

Reilly¹,

Jäger²,

Cooper³

et al. 2022

Preprint

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We propose a method to adiabatically control an atomic ensemble using a decoherence-free subspace (DFS) within a dissipative cavity. We can engineer a specific eigenstate of the system's Lindblad jump operators by injecting a field into the cavity which deconstructively interferes with the emission amplitude of the ensemble. In contrast to previous adiabatic DFS proposals, our scheme creates a DFS in the presence of collective decoherence. We therefore have the ability to engineer states that have high multi-particle entanglements which may be exploited for quantum information science or metrology. We further demonstrate a more optimized driving scheme that utilizes the knowledge of possible diabatic evolution gained from the so-called adiabatic criteria. This allows us to evolve to a desired state with exceptionally high fidelity on a time scale that does not depend on the number of atoms in the ensemble. By engineering the DFS eigenstate adiabatically, our method allows for faster state preparation than previous schemes that rely on damping into a desired state solely using dissipation.

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“…This limitation excludes quantum algorithms for preparing Dicke states which are based on the full addressability of the qubits [25,26]. To address this issue, some work has been dedicated to schemes which require only a global control of the spin ensemble, such as using steadystate evolution [27], repeated energy transfer [7], continuous weak measurements [28], and the use of geometric phase gates [29]. Unfortunately, these methods are still demanding currently when N is large, as they often need complicated measurement-based feedback, high fidelity control, and long preparation times.…”

Section: Introductionmentioning

confidence: 99%

Preparing Dicke states in a spin ensemble using phase estimation

Wang

Terhal

2021

Phys. Rev. A

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We present a Dicke state preparation scheme which uses global control of N spin qubits: our scheme is based on the standard phase estimation algorithm, which estimates the eigenvalue of a unitary operator. The scheme prepares a Dicke state nondeterministically by collectively coupling the spins to an ancilla qubit via a ZZ interaction, using log 2 N + 1 ancilla qubit measurements. The preparation of such Dicke states can be useful if the spins in the ensemble are used for magnetic sensing: we discuss a possible realization using an ensemble of electronic spins located at diamond nitrogen-vacancy centers coupled to a single superconducting flux qubit. We also analyze the effect of noise and limitations in our scheme.

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Extreme spin squeezing in the steady state of a generalized Dicke model

Cited by 18 publications

References 73 publications

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

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

Adiabatic Control of Decoherence-Free-Subspaces in an Open Collective System

Preparing Dicke states in a spin ensemble using phase estimation

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