High‐Speed Quantum Transducer with a Single‐Photon Emitter in a 2D Resonator,Annalen Der Physik

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High‐Speed Quantum Transducer with a Single‐Photon Emitter in a 2D Resonator
Annalen Der Physik ( IF 2.2 ) Pub Date : 2020-08-23 , DOI: 10.1002/andp.202000233
Xingyu Gao ₁ , Zhang‐Q. Yin ₂ , Tongcang Li _{1,

3,

4,

5}

Affiliation

Quantum transducers can transfer quantum information between different systems. Microwave–optical photon conversion is important for future quantum networks to interconnect remote superconducting quantum computers with optical fibers. Here, a high‐speed quantum transducer based on a single‐photon emitter in an atomically thin membrane resonator, that can couple single microwave photons to single optical photons, is proposed. The 2D resonator is a freestanding van der Waals heterostructure (which may consist of hexagonal boron nitride, graphene, or other 2D materials) that hosts a quantum emitter. The mechanical vibration (phonon) of the 2D resonator interacts with optical photons by shifting the optical transition frequency of the single‐photon emitter with strain or the Stark effect. The mechanical vibration couples to microwave photons by shifting the resonant frequency of an LC circuit that includes the membrane. Thanks to the small mass of the 2D resonator, both the single‐photon optomechanical coupling strength and the electromechanical coupling strength can reach the strong coupling regime. This provides a way for high‐speed quantum state transfer between a microwave photon, a phonon, and an optical photon.

中文翻译：

二维谐振器中具有单光子发射器的高速量子换能器

量子换能器可以在不同系统之间传递量子信息。微波光子转换对于将来的量子网络将远程超导量子计算机与光纤互连至关重要。在此，提出了一种基于原子薄膜谐振器中单光子发射器的高速量子换能器，它可以将单个微波光子耦合到单个光子。2D谐振器是一个独立的范德华异质结构（可以由六方氮化硼，石墨烯或其他2D材料组成），它承载着一个量子发射器。2D谐振器的机械振动（声子）通过使单光子发射器的光学跃迁频率因应变或斯塔克效应而移动，从而与光子相互作用。通过改变包括膜的LC电路的谐振频率，机械振动耦合到微波光子。由于2D谐振器的质量小，单光子光机耦合强度和机电耦合强度都可以达到强耦合状态。这提供了一种在微波光子，声子和光学光子之间进行高速量子状态转移的方法。

更新日期：2020-10-11

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