# Analog cosmological particle generation in a superconducting circuit

## TL;DR

This paper proposes a superconducting circuit setup that mimics quantum field behavior in an expanding universe, enabling the study of cosmological particle generation through analogue gravity experiments.

## Contribution

It introduces a novel superconducting circuit design that simulates cosmological particle creation, bridging quantum electrodynamics and gravitational physics.

## Key findings

- Demonstrates the behavior of node flux as an analog to quantum fields in cosmology
- Shows feasibility of detecting cosmological particle generation with current cQED technology
- Paves the way for experimental exploration of quantum gravitational effects

## Abstract

We propose the use of a waveguidelike transmission line based on direct-current superconducting quantum interference devices (dc-SQUID) and demonstrate that the node flux in this transmission line behaves in the same way as quantum fields in an expanding (or contracting) universe. We show how to detect the analog cosmological particle generation and analyze its feasibility with current circuit quantum electrodynamics (cQED) technology. Our setup in principle paves a new way for the exploration of analogue quantum gravitational effects.