Echoes of a Squeezed Oscillator

TL;DR

This paper explores how applying pulses to inhomogeneously broadened squeezed oscillators can generate echoes, revealing coherence recovery in classical and quantum systems like light and vibrations.

Contribution

It introduces a novel echo phenomenon in squeezed harmonic oscillators, extending the concept of echoes to quantum and classical linear systems.

Findings

Echoes can be generated in squeezed oscillators through pulse sequences.

Coherence recovery is observed in both classical and quantum regimes.

The phenomenon applies to light and vibrational modes.

Abstract

Pulses applied to an inhomogeneously broadened set of harmonic oscillators, previously prepared in squeezed states, can lead to a recovery of coherence, manifesting itself as echoes, similar to those exhibited by an ensemble of spins when excited by properly designed electromagnetic pulses. Such echoes, of classical or quantum nature, are expected to arise in the squeezing of linear systems of various sorts and, in particular, light and vibrational modes.