Microwave and optical photons entanglement in a hybrid electro-optomechanical system: effect of a mechanical plasmonic w
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Microwave and optical photons entanglement in a hybrid electro-optomechanical system: effect of a mechanical plasmonic waveguide at high temperatures A. Asghari Nejada Faculty of science, Physics department, Vali-e-Asr university of Rafsanjan, Velayat boulevard, Rafsanjan, Iran Received: 18 February 2020 / Accepted: 17 September 2020 © Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this paper, we describe a hybrid electro-optomechanical system consisting of a microwave resonator and an optical cavity which are coupled together by a plasmonic waveguide with a fixed side and another mechanically oscillating one. We show that a considerable entanglement can be obtained between optical and microwave photons at temperatures between T = 10K and T = 15K through our proposed system. Also, we show that it is possible to suppress effect of the temperature on entanglement between optical and microwave photons by a direct current voltage applied on both sides of the plasmonic waveguide. Furthermore, we show importance of the presence of optomechanical interaction in the system to obtain a significant entanglement between optical and microwave photons. Overall we show our system is an appropriate candidate to perform as a detector in detection of received microwave signals from an object with low reflectivity which is embedded in a bright thermal environment.
1 Introduction In recent years investigation of systems in the macroscopic scale such as gravitational wave detectors [1,2] and optomechanics [3–9] have attracted an intense attention in the field of quantum optics. In these kind of systems, it is necessary to create interaction between different subsystems by means of an appropriate mechanism. In optomechanical systems the interface between optical and mechanical modes is radiation pressure [10–12]. Addressing new applications of mechanical oscillations, optomechanics [11,13–22] and electro-optomechanics [23–26] have illuminated new and remarkable areas of quantum physics in which a macroscopic scale system (mechanical resonator) interacts with a quantum mechanical being (optical photons). Different physical phenomena have been investigated in optomechanical systems such as optical bistability [19], photon blockade [8], optomechanical cooling in the non-Markovian regime [27], self-cooling of a micro mirror[28], generation of squeezed mechanical states [29] and tunable slow light [30]. As a consequence of coupling between photons and mechanical modes, recently, many efforts have been devoted for creation of interaction between optical and microwave photons by means of a mechanical resonator both
a e-mail: [email protected] (corresponding author)
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theoretically [31–36] and experimentally [37–39]. In this kind of systems output optical signal contains information carried by received microwave signal and the position and momentum of the mechanical resonator. Subsequently, an
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