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

Toklikishvili, Z.; Chotorlishvili, L.; Mishra, S. K.; Stagraczyński, S.; Schüler, Michael; Rau, A. R. P.; Berakdar, Jamal

doi:10.1088/1361-6455/aa5a69

“…As a consequence, the NMR with the GigaHertz vibrational frequency can be served as the coherent quantum devices to test the fundamental principles in quantum mechanics (e.g., the Heisenberg uncertainty relation, quantum superposition, and macroscopic quantum, etc.) and also generate various hybrid quantum systems (e.g., coupling it to the superconducting circuits 9,10 , semiconducting quantum dots 11,12 , and NV centers 13,14 , etc. 15 ) for implementing the desired quantum metrologies and quantum information processings [16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

A microwave scattering spectral method to detect the nanomechanical vibrations embedded in a superconducting qubit

H

¹

,

Wei

²

2022

Preprint

0

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Nanomechanical resonators (NMRs), as the quantum mechanical sensing probers, have played the important roles for various high-precision quantum measurements. Differing from the previous emission spectral probes (i.e., the NMR modified the atomic emission), in this paper we propose an alternative approach, i.e., by probing the scattering spectra of the quantum mechanical prober coupled to the driving microwaves, to characterize the physical features of the NMR embedded in a rf-SQUID based superconducting qubit. It is shown that, from the observed specifical frequency points in the spectra, i.e., either the dips or the peaks, the vibrational features (i.e., they are classical vibration or quantum mechanical one) and the physical parameters (typically such as the vibrational frequency and displacements) of the NMR can be determined effectively. The proposal is feasible with the current technique and should be useful to design the desired NMRs for various quantum metrological applications.

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“…Our interest here concerns the case when cantilever coupled to the NV center performs nonlinear oscillations. For more details about the model in question, we refer to the earlier works [31,39,40]. In particular, we assume that kicks of the external driving field force the classical motion of the cantilever and the overlapping of nonlinear resonances may induce the chaotic motion of the cantilever.…”

Section: Introductionmentioning

confidence: 99%

Hybrid quantum-classical chaotic NEMS

Singh,

Chotorlishvili,

Toklikishvili

et al. 2020

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0

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We present an exactly solvable model of a hybrid quantum-classical system of a Nitrogen-Vacancy (NV) center spin (quantum spin) coupled with a nanocantilever (classical) and analyze the enforcement of the regular or chaotic classical dynamics onto to the quantum spin dynamics. The main problem we focus in this paper is whether the classical dynamical chaos may induce chaotic quantum effects in the spin dynamics. We explore several characteristic criteria of the quantum chaos, such as quantum Poincaré recurrences, generation of coherence and energy level distribution and observe interesting chaotic effects in the spin dynamics. Dynamical chaos imposed in the cantilever dynamics through the kicking pulses induces the stochastic dynamics of the quantum subsystem. However, we show that this type of stochasticity does not possess all the characteristic features of the quantum chaos and is distinct from it. The phenomenon of the hybrid quantum-classical chaos leads to dynamical freezing of the NV spin.

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“…As a consequence, the NMR with the GigaHertz vibrational frequency can be served as the coherent quantum devices to test the fundamental principles in quantum mechanics (e.g., the Heisenberg uncertainty relation, quantum superposition, and macroscopic quantum, etc.) and also generate various hybrid quantum systems (e.g., coupling it to the superconducting circuits 9,10 , semiconducting quantum dots 11,12 , and NV centers 13,14 , etc. 15 ) for implementing the desired quantum metrologies and quantum information processings [16][17][18] .…”

mentioning

confidence: 99%

A microwave scattering spectral method to detect the nanomechanical vibrations embedded in a superconducting qubit

H

¹

,

Wei

²

2023

Sci Rep

0

View full text Add to dashboard Cite

Nanomechanical resonators (NMRs), as the quantum mechanical sensing probers, have played the important roles for various high-precision quantum measurements. Differing from the previous emission spectral probes (i.e., the NMR modified the atomic emission), in this paper we propose an alternative approach, i.e., by probing the scattering spectra of the quantum mechanical prober coupled to the driving microwaves, to characterize the physical features of the NMR embedded in a rf-SQUID based superconducting qubit. It is shown that, from the observed specifical frequency points in the spectra, i.e., either the dips or the peaks, the vibrational features (i.e., they are classical vibration or quantum mechanical one) and the physical parameters (typically such as the vibrational frequency and displacements) of the NMR can be determined effectively. The proposal is feasible with the current technique and should be useful to design the desired NMRs for various quantum metrological applications.

show abstract

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

Cited by 5 publications

References 39 publications

A microwave scattering spectral method to detect the nanomechanical vibrations embedded in a superconducting qubit

A microwave scattering spectral method to detect the nanomechanical vibrations embedded in a superconducting qubit

Hybrid quantum-classical chaotic NEMS

A microwave scattering spectral method to detect the nanomechanical vibrations embedded in a superconducting qubit

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