Abstract
Abstract 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.
Highlights
Vector beams, characterized by the ability to tailor light by polarization control, are important for both fundamen-Ying Li and Ya-Feng Jiao contributed to this work.A peculiar property of quantum entanglement, that measuring one part of the entangled elements allows to determine the state of the other, makes it a key resource for quantum technologies, ranging from quantum information processing [29, 30] to quantum sensing [31, 32]
Based on a cavity optomechanics (COM) system, we propose how to achieve a coherent switch of quantum entanglement of photons and phonons through polarization control
We show that the intracavity field intensity and the associated COM entanglement can be coherently manipulated by adjusting the polarization of a driving laser
Summary
Vector beams, characterized by the ability to tailor light by polarization control, are important for both fundamen-. Quantum entanglement has been observed in diverse systems involving photons, ions, atoms, and superconducting qubits [34, 35]. Quantum entanglement between propagating optical modes, between optical and mechanical modes, or between massive mechanical oscillators have all been realized in COM systems [43–53] In view of these rapid advances, COM devices have become one of the promising candidates to operate as versatile quantum nodes processing or interchanging information with flying photons in a hybrid quantum network. Based on a COM system, we propose how to achieve a coherent switch of quantum entanglement of photons and phonons through polarization control. We show that the intracavity field intensity and the associated COM entanglement can be coherently manipulated by adjusting the polarization of a driving laser This provides an efficient way to manipulate the light-motion coupling, which is at the core of COM-based quantum technologies. Our work can be extended to various COM systems realized with e.g., cold atoms, magnomechanical devices, and optoelectrical circuits [56, 57]
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