# $N$-phonon bundle emission via the anti-Stokes process

## TL;DR

This paper theoretically demonstrates a mechanism for generating pure, correlated $n$-phonon states in an acoustic cavity QED system using anti-Stokes resonances, with potential applications in quantum technologies.

## Contribution

It introduces a novel anti-Stokes resonance-based method for $n$-phonon bundle emission with high purity and tunability in an acoustic cavity QED system.

## Key findings

- Achieves near-perfect purity of $n$-phonon states
- Demonstrates tunability over a wide parameter range
- Proposes applications in quantum information and metrology

## Abstract

We demonstrate theoretically the bundle emission of $n$ strongly correlated phonons in an acoustic cavity QED system. The mechanism relies on anti-Stokes resonances that generate super-Rabi oscillations between states with a large difference in their number of excitations, which, combined with dissipation, transfer coherently pure $n$-phonon states outside of the cavity. This process works with close to perfect purity over a wide range of parameters and is tunable optically with well-resolved operation conditions. This broadens the realm of quantum phononics, with potential applications for on-chip quantum information processing, quantum metrology, and engineering of new types of quantum devices, such as optically heralded $N$-phonon guns.