Qasymeh Montasir, Eleuch Hichem
Electrical and Computer Engineering Department, Abu Dhabi University, Abu Dhabi, UAE.
Department of Applied Physics and Astronomy, University of Sharjah, Sharjah, UAE.
Sci Rep. 2020 Oct 7;10(1):16676. doi: 10.1038/s41598-020-73363-y.
A measurable quadrature of a squeezed quantum state manifests a small uncertainty below the Heisenberg limit. This phenomenon has the potential to enable several extraordinary applications in quantum information, metrology and sensing, and other fields. Several techniques have been implemented to realize squeezed electromagnetic states, including microwave fields and optical fields. However, hybrid squeezed modes (that incorporate both microwave and optical fields) have not yet been proposed despite their vital functionality to combine the two worlds of quantum superconducting systems and photonics systems. In this work, for the first time, we propose a novel approach to achieve two-mode squeezing of microwave and optical fields using graphene based structure. The proposed scheme includes a graphene layered structure that is driven by a quantum microwave voltage and subjected to two optical fields of distinct frequencies. By setting the optical frequency spacing equal to the microwave frequency, an interaction occurs between the optical and microwave fields through electrical modulation of the graphene conductivity. We show that significant hybrid two-mode squeezing, that includes one microwave field and one optical field, can be achieved. Furthermore, the microwave frequency can be tuned over a vast range by modifying the operation parameters.
压缩量子态的可测量正交分量表现出低于海森堡极限的小不确定性。这种现象有可能在量子信息、计量学和传感以及其他领域实现多种非凡应用。已经实施了几种技术来实现压缩电磁态，包括微波场和光场。然而，尽管混合压缩模式（同时包含微波和光场）对于结合量子超导系统和光子学系统这两个领域至关重要，但尚未被提出。在这项工作中，我们首次提出了一种使用基于石墨烯的结构来实现微波和光场双模压缩的新方法。所提出的方案包括一个由量子微波电压驱动并受到两个不同频率光场作用的石墨烯层状结构。通过将光频率间隔设置为等于微波频率，光场和微波场之间通过石墨烯电导率的电调制发生相互作用。我们表明，可以实现包括一个微波场和一个光场的显著混合双模压缩。此外，通过修改操作参数，微波频率可以在很大范围内进行调谐。
