Circuit QED flip-flop memory with all-microwave switching

TL;DR

This paper proposes a superconducting circuit-based microwave flip-flop memory with bistability, enabling ultra-low-energy switching using single-photon pulses, and demonstrating a memory lifetime surpassing individual component lifetimes.

Contribution

It introduces a novel all-microwave superconducting flip-flop with bistability and a simple switching mechanism, enhancing low-energy quantum memory applications.

Findings

Memory lifetime exceeds component state lifetimes

Single-photon pulses effectively switch the circuit

Bistable behavior demonstrated theoretically

Abstract

We present a theoretical proposal for a microwave driven circuit composed of superconducting resonators and qubits which shows a bistable behaviour, and we present a simple mechanism that allows single- or few-photon microwave pulses to work as Set- and Reset-signals that switch the circuit between its stable modes. The resulting system constitutes an ultra-low-energy Set-Reset flip-flop, and we show that its memory lifetime far exceeds the lifetime of states stored in any of its separate components.