Quantum State Transfer: Interplay between Gate and Readout Errors

TL;DR

This paper investigates how gate and readout errors interact and affect the success of quantum state transfer in quantum networks, revealing non-monotonic relationships through simulations and analysis.

Contribution

It introduces a detailed analysis of the interplay between gate and readout errors in quantum state transfer, using simulations and analytic methods.

Findings

Success probability is non-monotonic with respect to error rates.

Gate and readout errors can have complex, interacting effects.

Analytic and numerical tools help understand error interplay.

Abstract

Quantum networks consist of quantum nodes that are linked by entanglement and quantum information can be transferred from one node to another. Operations can be applied to qubits of local nodes coordinated by classical communication to manipulate quantum states and readout/measurement will be employed to obtain results. Here, we use quantum circuits to simulate quantum state transfer between two nodes connected in a linear geometry through other nodes. We explore the interplay between gate and readout errors on the performance of state transfer. We find that the nominal success probability is not necessarily a monotonic function of the two error rates and employ numerical simulations and analytic tools to understand their interplay.