Molecular Ensemble Based Remote Quantum Storage for Charge Qubit via Quasi-Dark State

TL;DR

This paper introduces a quantum storage method that uses a molecular ensemble and a quasi-dark state to transfer charge qubits into a collective molecular state, avoiding traditional time-control schemes.

Contribution

It presents a novel quantum storage scheme utilizing a hybrid circuit QED system with molecular ensembles and quasi-dark states for efficient charge qubit storage.

Findings

Effective charge qubit to molecular ensemble mapping demonstrated.

Quantum data bus enables interaction without time-control schemes.

Potential for robust quantum memory in hybrid systems.

Abstract

We propose a quantum storage scheme independent of the current time-control schemes, and study a "quantum data bus" (transmission line resonator) in a hybrid system consisting of a circuit QED system integrated with a cold molecular ensemble. Here, an effective interaction between charge qubit and molecule is mediated by the off-resonate field in the data bus. Correspondingly, the charge state can be mapped into the collective quasi-spin state of the molecular ensemble via the standard dark state based adiabatic manipulation.