External control of qubit-photon interaction and multi-qubit reset in a dissipative quantum network

TL;DR

This paper proposes a novel method to externally control qubit-photon interactions and reset multiple qubits simultaneously in a dissipative superconducting quantum network, leveraging dissipation to manage entanglement.

Contribution

It introduces an innovative dissipation-based control scheme enabling multiqubit reset in always-connected superconducting circuits, independent of qubit number.

Findings

Reset time is independent of the number of qubits.

The scheme tolerates significant system parameter fluctuations.

Applicable to higher-dimensional quantum networks.

Abstract

A quantum network is a promising quantum many-body system because of its tailored geometry and controllable interaction. Here, we propose an external control scheme for the qubit-photon interaction and multiqubit reset in a dissipative quantum network, which comprises superconducting circuit chains with microwave drives and filter-filter couplings. The traditional multiqubit reset of the quantum network requires physically disconnected qubits to prevent their entanglement. However, we use an original effect of dissipation, i.e., consuming the entanglement generated by qubits' interaction, to achieve an external control of the multiqubit reset in an always-connected superconducting circuit. The reset time is independent of the number of qubits in the quantum network. Our proposal can tolerate considerable fluctuations in the system parameters and can be applicable to higher-dimensional quantum networks.