Preparing quantum states via continuous measurement

Warwick P. Bowen; Chao Meng; Soroush Khademi; Amy Navarathna; James Bennett

doi:10.1117/12.3012175

13 March 2024 Preparing quantum states via continuous measurement

Warwick P. Bowen, Chao Meng, Soroush Khademi, Amy Navarathna, James Bennett

Proceedings Volume PC12912, Quantum Sensing, Imaging, and Precision Metrology II; PC129123K (2024) https://doi.org/10.1117/12.3012175
Event: SPIE Quantum West, 2024, San Francisco, California, United States

Abstract

In this presentation I will introduce a new approach to control the quantum state of a macroscopic mechanical resonator via measurement and conditioning. By operating in the fast measurement regime, we show that it is possible to prepare quantum squeezed states of motion. Remarkably, our theory predicts that the experimental requirements are greatly relaxed, even compared to mechanical ground-state cooling, to the point that quantum state preparation is feasible at room temperature with existing technology. I will present experiments showing a classical version of the predicted squeezing effect in a new engineered double-disk optomechanical device fabricated on a silicon chip. These experiments take advantage of both structural damping – which we show that, compared to the usual viscous damping, can improve quantum state preparation – and arrays of mechanical modes. Specifically, I will present experiments demonstrating that continuous position measurement can prepare thermomechanical squeezed states of motion, and to this for ensembles of structurally damped mechanical resonances.

Conference Presentation

Citation Download Citation

Warwick P. Bowen, Chao Meng, Soroush Khademi, Amy Navarathna, and James Bennett "Preparing quantum states via continuous measurement", Proc. SPIE PC12912, Quantum Sensing, Imaging, and Precision Metrology II, PC129123K (13 March 2024); https://doi.org/10.1117/12.3012175

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