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Journal of the Optical Society of America B

Optomechanical entanglement switch in the hybrid opto-electromechanical device

Li‐Guo Qin, Zhongyang Wang, Hongyang Ma, Chaomin Zhang, Li Ren, Lili Wang, Shangqing Gong

Published May 21, 2019• 6 citations
Publisher

Abstract

To promote the future quantum network, we demonstrate an electrically controlled optomechanical entanglement switch in a hybrid opto-electromechanical device, which consists of an opto-mechanical cavity capacitively coupling a variable capacitor, where a nanomechanical oscillator acts as an interface between the cavity and capacitor. In the device, the effective quality and detuning of the cavity can be adjusted by the voltage on the capacitor. Based on the sensitivity of the entanglement to the effective cavity detuning, by changing the voltage, the optomechanical entanglement can be electrically turned on or off. This integrated structure of entanglement switch will excite a development trend and implementation prospect toward integration and miniaturization of quantum module devices in the future quantum network.

DOI
10.1364/josab.36.001544

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To promote the future quantum network, we demonstrate an electrically controlled optomechanical entanglement switch in a hybrid opto-electromechanical device, which consists of an opto-mechanical cavity capacitively coupling a variable capacitor, where a nanomechanical oscillator acts as an interface between the cavity and capacitor. In the device, the effective quality and detuning of the cavity can be adjusted by the voltage on the capacitor. Based on the sensitivity of the entanglement to the effective cavity detuning, by changing the voltage, the optomechanical entanglement can be electrically turned on or off. This integrated structure of entanglement switch will excite a development trend and implementation prospect toward integration and miniaturization of quantum module devices in the future quantum network.
To promote the future quantum information technologies, we demonstrate an electrically driven optical switch based on quantum interference in a hybrid opto-electromechanical system, which consists of an opto-mechanical cavity and an external electric circuit. The key element of our scheme is a moveable mirror of cavity as a charged mechanical oscillator capacitively coupled to a fixed charged plate in a variable capacitor. By adjusting the voltage of the capacitor, the displacement of the moveable mirror is modulated, then the cavity field can be electrically turned on or off due to the detuning of the cavity. Based on the cavity induced transparency, the transparency window can be electrically switched on or off by turning on or off the cavity field. Therefore, the susceptibility of the medium in the cavity can be electrically controlled, i.e., the scheme of the electrically controlled absorption switching can be demonstrated. This electrically driven optical switch will excite a development trend and implementation prospect towards the integration and miniaturization of quantum module device in a chip.
This paper investigates the deterministic generation and coherent control of continuous-variable bipartite and tripartite entanglement within a multi-mirror electro-optomechanical ring cavity. The proposed architecture integrates radiation pressure with tunable Coulomb interactions, governed by external gate voltages, to establish quantum correlations between an intracavity optical field and a collective of four mechanical oscillators. We perform a rigorous stability analysis of the system, identifying the operational regimes across a broad range of free parameters, and evaluate the generation of tripartite entanglement within two distinct subsystems. Our numerical results demonstrate that while standard coherent driving combined with Coulomb coupling can generate entanglement, it is restricted to narrow detuning regions. In contrast, the introduction of squeezed light dramatically enhances quantum correlations, facilitating entanglement over a significantly wider range of normalized detuning without compromising the stability of the optomechanical system. A central finding is that the fixed charged body serves as a dynamic control parameter rather than a static component; by effectively tuning the mechanical susceptibility, it enables the generation of optomechanical entanglement that is both stronger and more resilient to thermal noise than the mechanical–mechanical entanglement mediated by direct Coulomb interaction. Furthermore, the external gate voltage provides a reliable mechanism for the continuous tuning of mechanical coupling strengths. From a practical perspective, the ability of the Coulomb coupling to act as a quantum switch for activating or suppressing entanglement suggests significant potential for quantum information control and state transfer within hybrid quantum architecture networks.
We propose a scheme for two-dimensional image storage based on optomechanically induced transparency in a hybrid opto-electromechanical system comprising a cavity optomechanical system and a tunable capacitor. This scheme is a fully opto-electromechanical two-dimensional image storage mechanism that is independent of atomic ensembles. The charged mechanical oscillator serves as the coupling interface between these two subsystems. Analytical and numerical results show that the optomechanical coupling strength in the cavity optomechanical system significantly influences the storage performance of two-dimensional images. When the optomechanical coupling strength is fixed, the storage efficiency can be further improved and optimized by modulating the external voltage applied to the capacitor. The proposed scheme holds promise for applications in two-dimensional image information storage and high-fidelity quantum storage in quantum information processing.
Quantum opto- and electromechanical systems interface mechanical motion with the electromagnetic modes of optical resonators and microwave circuits. The capabilities and promise of these hybrid devices have been showcased through a variety of recent experimental advances that demonstrated exquisite control over the quantum state of solid-state mechanical objects. In this perspective, we offer an overview of the current state, as well as an outlook of the future directions, challenges, and opportunities for this growing field of research. We focus, in particular, on the prospects for ground state cooling of mechanical modes and their use in quantum circuits, transducers, and networks.
The polarizations of optical fields, besides field intensities, provide more degrees of freedom to manipulate coherent light-matter interactions. Here, we propose how to achieve a coherent switch of optomechanical entanglement in a polarized-light-driven cavity system. We show that by tuning the polarizations of the driving field, the effective optomechanical coupling can be well controlled and, as a result, quantum entanglement between the mechanical oscillator and the optical transverse electric mode can be coherently and reversibly switched to that between the same phonon mode and the optical transverse magnetic mode. This ability to switch optomechanical entanglement with such a vectorial device can be important for building a quantum network being capable of efficient quantum information interchanges between processing nodes and flying photons.
The polarizations of optical fields, besides field intensities, provide more degrees of freedom to manipulate coherent light-matter interactions. Here we propose how to achieve a coherent switch of optomechanical entanglement in a polarized-light-driven cavity system. We show that by tuning the polarizations of the driving field, the effective optomechanical coupling can be well controlled and, as a result, quantum entanglement between the mechanical oscillator and the optical transverse electric (TE) mode can be coherently and reversibly switched to that between the same phonon mode and the optical transverse magnetic (TM) mode. This ability of switching optomechanical entanglement with such a vectorial device can be important for building a quantum network being capable of efficient quantum information interchanges between processing nodes and flying photons.