# Quantum Backreaction on Classical Dynamics

## TL;DR

This paper investigates how quantum effects influence classical particle dynamics by analyzing quantum dissipation and proposing classical initial conditions that mimic quantum backreaction, aiding in classical approximations of quantum systems.

## Contribution

It introduces a method to evaluate quantum dissipation in classical particles and identifies classical initial conditions that replicate quantum backreaction effects.

## Key findings

- Quantum dissipation can be characterized in classical particle dynamics.
- Classical initial conditions can approximate quantum backreaction effects.
- The approach offers a way to incorporate quantum effects into classical models.

## Abstract

Motivated by various systems in which quantum effects occur in classical backgrounds, we consider the dynamics of a classical particle as described by a coherent state that is coupled to a quantum bath via bi-quadratic interactions. We evaluate the resulting quantum dissipation of the motion of the classical particle. We also find classical initial conditions for the bath that effectively lead to the same dissipation as that due to quantum effects, possibly providing a way to approximately account for quantum backreaction within a classical analysis.