International Journal of Physics | Vol. 8, No. 9, September 2017 | pp. 65–72
DOI: 10.46882/2017/IJP/000089
Research Article
Title: Squeezed Vacuum State Propagation and Optomechanical Coupling Dynamics in Disordered Microdisk Resonators
Names of Authors: A. M. Ross¹, D. W. Meyer²
Authors’ Affiliations: ¹Department of Physics, University of Queensland, Brisbane, QLD 4072, Australia; ²Institute of Physics, Karlsruher Institut für Technologie, Karlsruhe, Germany
Abstract: Maintaining quantum state correlations across integrated optical networks is crucial for building fault-tolerant quantum computing architectures and secure communication lines. This paper models continuous-wave squeezed vacuum state propagation and characterizes optomechanical coupling dynamics within a linear array of coupled silica microdisk resonators subjected to spatial fabrication disorder. We solved the quantum stochastic Schrödinger equations using an algebraic operator framework that accounts for localized evanescent coupling variations, cavity mirror losses, and thermal phonon dephasing at 4.2 K. Squeezed vacuum states at 1550.0 nm were injected into the boundary cavity of a 15-channel system. The calculations demonstrate that introducing a 4.0% structural disorder in cavity resonance frequencies induces strong spatial localization of light. This localization reduces the squeezing level in the primary channel from 8.0 dB down to 2.4 dB over a brief 12.0 ps interaction window. To protect the quantum states, we simulated an active phase-modulation feedback sequence. This sequence establishes a synthetic gauge field that suppresses backscattering and locks the relative phase of the local oscillator. The optimized array configuration successfully restored the squeezing level to 6.8 dB at the output port, yielding a state fidelity calculation of 94.8% ± 0.3%.
Keywords: Quantum optics; squeezed states; optical cavities; optomechanics; cavity arrays; integrated photonics
Manuscript Timeline: Received: May 12, 2017; Revised: July 03, 2017; Accepted: July 25, 2017; Published: September 11, 2017
Citation: Ross, A. M., & Meyer, D. W. (2017). Squeezed Vacuum State Propagation and Optomechanical Coupling Dynamics in Disordered Microdisk Resonators. International Journal of Physics, 8(9), 65–72.
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