Spatially Adiabatic Frequency Conversion in Optoelectromechanical Arrays

Abstract

Faithful conversion of quantum signals between microwave and optical frequency domains is crucial for building quantum networks based on superconducting circuits. Optoelectromechanical systems, in which microwave and optical cavity modes are coupled to a common mechanical oscillator, are a promising route towards this goal. In these systems, efficient, low-noise conversion is possible using a mechanically dark mode of the fields but the conversion bandwidth is limited to a fraction of the cavity linewidth. Here, we show that an array of optoelectromechanical transducers can overcome this limitation and reach a bandwidth that is larger than the cavity linewidth. The coupling rates are varied in space throughout the array so that the mechanically dark mode of the propagating fields adiabatically changes from microwave to optical or vice versa. This strategy also leads to significantly reduced thermal noise with the collective optomechanical cooperativity being the relevant figure of merit. Finally, we demonstrate that, quite surprisingly, the bandwidth enhancement per transducer element is largest for small arrays; this feature makes our scheme particularly attractive for state-of-the-art experimental setups.

18 pages, 10 figures (including Supplemental Material)

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Cited by in corpus (9)

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• Nonreciprocal ground-state cooling of multiple mechanical resonators
• Multimode optomechanical cooling via general dark-mode control
• Domino cooling of a coupled mechanical-resonator chain via cold-damping feedback
• Electro-optomechanical equivalent circuits for quantum transduction
• Interference effects in hybrid cavity optomechanics
• Millionfold improvement in multivibration-feedback optomechanical refrigeration via auxiliary mechanical coupling
• Coherent feedback control for cavity optomechanical systems with a frequency-dependent mirror
• Accelerated Gaussian quantum state transfer between two remote mechanical resonators