Role of Error Syndromes in Teleportation Scheduling

TL;DR

This paper explores how error syndrome information and quantum error correction can improve teleportation scheduling in quantum networks, especially under decoherence and limited entanglement resources.

Contribution

It introduces a method to incorporate error syndromes into teleportation scheduling to reduce errors and improve fidelity in quantum networks.

Findings

Error syndrome data can predict qubit error likelihoods.

Scheduling with error information enhances teleportation fidelity.

Quantum error correction integrated into scheduling improves resource efficiency.

Abstract

Quantum teleportation enables quantum information transmission, but requires distribution of entangled resource states. Unfortunately, decoherence, caused by environmental interference during quantum state storage, can degrade quantum states, leading to entanglement loss in the resource state and reduction of the fidelity of the teleported information. In this work, we investigate the use of error correction and error syndrome information in scheduling teleportation at a quantum network node in the presence of multiple teleportation requests and a finite rate of remote entanglement distribution. Specifically, we focus on the scenario where stored qubits undergo decoherence over time due to imperfect memories. To protect the qubits from the resulting errors, we employ quantum encodings, and the stored qubits undergo repeated error correction, generating error syndromes in each round. These error syndromes can provide additional benefits, as they can be used to calculate qubit-specific error likelihoods, which can then be utilized to make better scheduling decisions. By integrating error correction techniques into the scheduling process, our goal is to minimize errors and decoherence effects, thereby enhancing the fidelity and efficiency of teleportation in a quantum network setting.