Quantum router based on ac control of qubit chains

TL;DR

This paper proposes a quantum routing method using ac control of qubit chains, leveraging coherent destruction of tunneling to enable controlled quantum information transfer, with potential implementation in Penning traps.

Contribution

It introduces a novel quantum routing protocol based on time-dependent local fields and tunneling control, advancing quantum network control techniques.

Findings

Effective quantum routing achieved via ac control of qubit couplings.

Robustness of the protocol demonstrated under realistic experimental conditions.

Potential implementation in Penning trap systems discussed.

Abstract

We study the routing of quantum information in qubit chains. This task is achieved by suitably chosen time-dependent local fields acting on the qubits. Employing the physics of coherent destruction of tunneling, we demonstrate that a driving-induced renormalization of the coupling between neighboring qubits provides the key for controlling the transduction of quantum information between permanently coupled qubits. We employ this idea for building a quantum router. Moreover, we discuss the experimental implementation with Penning traps, and study the robustness of our protocol under realistic experimental conditions, such as fabrication uncertainties and decoherence.