Scalable nuclear-spin entanglement mediated by a mechanical oscillator

Cao, Puhao; Betzholz, Ralf; Cai, Jianming

doi:10.1103/physrevb.98.165404

Cited by 8 publications

(5 citation statements)

References 65 publications

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“…The most straightforward approach for having an electronic-motion interface is to couple them through local strain, if the sensitivity of color centers to the locally applied strain allows for it. This has already been investigated and proven rather successful in diamond point defects [15][16][17], in which, some schemes are even proposed for entangling and networking the color centers or nuclear spins through the phonons [18][19][20]. In particular, the exceptional strain susceptibility of silicon vacancy centers in diamond has allowed the researchers to develop setups where a considerable number of SiV centers are controlled and tuned by strain [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Strain induced coupling and quantum information processing with hexagonal boron nitride quantum emitters

Tabesh¹,

Hassanzada²,

Hadian³

et al. 2021

Quantum Sci. Technol.

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We propose an electromechanical scheme where the electronic degrees of freedom of boron vacancy color centers hosted by a hexagonal boron nitride (hBN) nanoribbon are coupled for quantum information processing. The mutual coupling of color centers is provided via their coupling to the mechanical motion of the ribbon, which in turn stems from the local strain. The coupling strengths are computed by performing ab initio calculations. The density functional theory results for boron vacancy centers on boron nitride monolayers reveal a huge strain susceptibility. In our analysis, we take into account the effect of all flexural modes and show that despite the thermal noise introduced through the vibrations one can achieve steady-state entanglement between two and more number of qubits that survives even at room temperature. Moreover, the entanglement is robust against mis-positioning of the color centers. The effective coupling of color centers is engineered by positioning them in the proper positions. Hence, one is able to tailor stationary graph states. Furthermore, we study the quantum simulation of the Dicke-Ising model and show that the phonon non-equilibrium phase transition occurs even for a finite number of color centers. Given the steady-state nature of the proposed scheme and accessibility of the electronic states through optical fields, our work paves the way for the realization of steady-state quantum information processing with color centers in hBN membranes.

show abstract

Section: Introductionmentioning

confidence: 99%

Strain induced coupling and quantum information processing with hexagonal boron nitride quantum emitters

Tabesh¹,

Hassanzada²,

Hadian³

et al. 2021

Quantum Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The most straightforward approach for having an electronic-motion interface is to couple them through local strain, if the sensitivity of color centers to the locally applied strain allows for it. This has already been investigated and proven rather successful in dia-mond point defects [15][16][17], in which, some schemes are even proposed for entangling and networking the color centers or nuclear spins through the phonons [18][19][20]. In particular, the exceptional strain susceptibility of silicon vacancy centers in diamond has allowed the researchers to develop setups where a considerable number of SiV centers are controlled and tuned by strain [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Strain induced coupling and quantum information processing with hexagonal boron nitride quantum emitters

Tabesh,

Hassanzada,

Hadian

et al. 2021

Preprint

View full text Add to dashboard Cite

We propose an electromechanical scheme where the electronic degrees of freedom of boron vacancy color centers hosted by a hexagonal boron nitride nanoribbon are coupled for quantum information processing. The mutual coupling of color centers is provided via their coupling to the mechanical motion of the ribbon, which in turn stems from the local strain. The coupling strengths are computed by performing ab initio calculations. The density functional theory (DFT) results for boron vacancy centers on boron nitride monolayers reveal a huge strain susceptibility. In our analysis, we take into account the effect of all flexural modes and show that despite the thermal noise introduced through the vibrations one can achieve steady-state entanglement between two and more number of qubits that survives even at room temperature. Moreover, the entanglement is robust against mis-positioning of the color centers. The effective coupling of color centers is engineered by positioning them in the proper positions. Hence, one is able to tailor stationary graph states. Furthermore, we study the quantum simulation of the Dicke-Ising model and show that the phonon superradiance phase transition occurs even for a finite number of color centers. Given the steady-state nature of the proposed scheme and accessibility of the electronic states through optical fields, our work paves the way for the realization of steady-state quantum information processing with color centers in hexagonal boron nitride membranes.

show abstract

“…In this regime, a single photon can be strongly coupled to a single phonon, whereas the reported opto-mechanical strong couplings have been achieved with multiple photons to amplify the effective coupling rate [5,30,31]. This single-photon strong coupling enables one to construct multipartite entangled spin systems in a solid-state platform [32].…”

mentioning

confidence: 99%