Memory effects in pulsed optomechanical systems

TL;DR

This paper demonstrates that pulsed cavity optomechanical systems can function as programmable quantum memory elements by controlling pulse shapes to induce and manipulate various memory phenomena, with potential applications in quantum information technologies.

Contribution

It introduces a method to engineer and control memory effects in pulsed optomechanical systems using specific pulse shapes, supported by analytical and numerical criteria.

Findings

Memory effects depend on pulse shape and regime

Memory phenomena include hysteresis and energy storage

Quantitative metric for memory efficiency

Abstract

Memory, understood as time non-locality, is a fundamental property of any physical system, whether classical or quantum, and has important applications in a wide variety of technologies. In the context of quantum technologies, systems with memory can be used in quantum information, communication, and sensing. Here, we demonstrate that cavity optomechanical systems driven by a pulsed laser can operate as programmable quantum memory elements. By engineering the adiabatic and non-adiabatic pulses, particularly the Gaussian and sinusoidal, we induce and control diverse memory phenomena such as dynamical hysteresis, quantized phononic transitions, and distinct energy-storing responses. Within a mean-field approach, we derive the analytical and numerical criteria under which the photonic and phononic observables manifest the memory effects in strongly driven regimes. The memory effects are quantified through a dimensionless geometric form factor, which provides a versatile metric to characterize the memory efficiency. Our protocol is readily compatible with the current optomechanical platforms, highlighting the new possibilities for advanced memory functionalities in quantum technologies.