Coupling a single nitrogen-vacancy center with a superconducting qubit via the electro-optic effect

Li, Changhao; Li, Pengbo

doi:10.1103/physreva.97.052319

“…In contrast, the powerful SHG emission that we observed from the symmetry-breaking NV layer will open new avenues to the development of diamondbased second-order nonlinear photonics as well as quantum technologies. We envisage that a low-loss optoelectronic device based on the electro-optic effect, one of the second-order NLO processes, 13 can be developed, such as a superconducting qubit 33 and a diamond mechanical resonator, 34 by which quantum information science would be benefited. Furthermore, precise temperature sensing using temperature-dependent phase matching for SHG will be realized, where the change in the diamond refractive index upon heating/cooling can be detected via the variation of the SHG intensity.…”

mentioning

confidence: 99%

Second-Harmonic Generation in Bulk Diamond Based on Inversion Symmetry Breaking by Color Centers

Abulikemu

¹

,

Kainuma

²

,

An

³

et al. 2021

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Breaking inversion symmetry in solids plays a central role in nonlinear optics because it can change material properties-such as producing even-order nonlinear optical (NLO) effects. Although centrosymmetric diamond has been developed as photonic platforms including waveguides and light sources, the NLO effects in bulk diamond are limited to the third-order. Thus, exploiting more powerful second-order NLO effects-such as second harmonic generation (SHG)-are still challenging. Here we explore symmetry-breakinginduced second-order NLO effects in bulk diamond using the color center-nitrogen-vacancy center. Exciting with ultrashort laser pulses, SHG and third-harmonic generation (THG) are simultaneously observed at the same time, exhibiting characteristic intensity patterns depending on both the excitation fluence and the angle of light polarization. We uncovered that SHG serves as the source for THG by the cascading process. Our findings will offer SHG-based quantum sensing by diamond color centers-such as imaging of electromagnetic field by electro-optic effects on the nanofemto scale.

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“…Thus, the protocol is not compatible with our scheme, which uses a photonic (optomechanical) cavity to enhance spin-photon interaction. In another approach, a microwave photon emitted from a superconducting qubit is converted to an optical photon using an electro-optic effect and driving laser [30][31][32][33][34]. Using the converted optical photon and a driving laser, the ground state of NV − is controlled through the interaction between a Λ-type three-level system (|m s = ±1 and |A 2 of NV − ).…”

Section: Entanglement Generation Between the Superconducting Qubit An...mentioning

confidence: 99%

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

Kurokawa¹,

Moyuki²,

Sekiguchi³

et al. 2022

Preprint

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Quantum communication between remote superconducting systems is being studied intensively to increase the number of integrated superconducting qubits and to realize a distributed quantum computer. Since optical photons must be used for communication outside a dilution refrigerator, the direct conversion of microwave photons to optical photons has been widely investigated. However, the direct conversion approach suffers from added photon noise, heating due to a strong optical pump, and the requirement for large cooperativity. Instead, for quantum communication between superconducting qubits, we propose an entanglement distribution scheme using a solid-state spin quantum memory that works as an interface for both microwave and optical photons. The quantum memory enables quantum communication without significant heating inside the refrigerator, in contrast to schemes using high-power optical pumps. Moreover, introducing the quantum memory naturally makes it possible to herald entanglement and parallelization using multiple memories.

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“…It is noteworthy that different protocols have been suggested to transfer the state of a superconducting qubit to the electron spin (N-V − ) in a diamond [32,33]. The scheme proposed in Ref.…”

Section: Entanglement Generation Between the Superconducting Qubit An...mentioning

confidence: 99%

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

Kurokawa

¹

,

Moyuki

²

,

Sekiguchi

³

et al. 2022

View full text Add to dashboard Cite

Quantum communication between remote superconducting systems is being studied intensively to increase the number of integrated superconducting qubits and to realize a distributed quantum computer. Since optical photons must be used for communication outside a dilution refrigerator, the direct conversion of microwave photons to optical photons has been widely investigated. However, the direct conversion approach suffers from added photon noise, heating due to a strong optical pump, and the requirement for large cooperativity. Instead, for quantum communication between superconducting qubits, we propose an entanglement distribution scheme using a solid-state spin quantum memory that works as an interface for both microwave and optical photons. The quantum memory enables quantum communication without significant heating inside the refrigerator, in contrast to schemes using high-power optical pumps. Moreover, introducing the quantum memory naturally makes it possible to herald entanglement and parallelization using multiple memories.

show abstract

Coupling a single nitrogen-vacancy center with a superconducting qubit via the electro-optic effect

Cited by 14 publications

References 63 publications

Second-Harmonic Generation in Bulk Diamond Based on Inversion Symmetry Breaking by Color Centers

Second-Harmonic Generation in Bulk Diamond Based on Inversion Symmetry Breaking by Color Centers

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

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