Entanglement of superconducting qubits via acceleration radiation

TL;DR

This paper demonstrates that simulated relativistic motion in superconducting qubits can generate entanglement, suppress spontaneous emission, and induce sub-radiance, offering new ways to control quantum states in quantum information processing.

Contribution

It introduces a method to mimic relativistic motion in superconducting qubits to generate entanglement and protect against decay, a novel approach in quantum control.

Findings

Relativistic motion can generate stationary entanglement between qubits.

Motion induces sub-radiance and a Zeno-like effect, reducing radiative decay.

Optimal conditions for entanglement depend on modulation parameters.

Abstract

We show that simulated relativistic motion can generate entanglement between artificial atoms and protect them from spontaneous emission. We consider a pair of superconducting qubits coupled to a resonator mode, where the modulation of the coupling strength can mimic the harmonic motion of the qubits at relativistic speeds, generating acceleration radiation. We find the optimal feasible conditions for generating a stationary entangled state between the qubits when they are initially prepared in their ground state. Furthermore, we analyze the effects of motion on the probability of spontaneous emission in the standard scenarios of single-atom and two-atom superradiance, where one or two excitations are initially present. Finally, we show that relativistic motion induces sub-radiance and can generate a Zeno-like effect, preserving the excitations from radiative decay.