Abstract

In quantum computers, information is encoded in quantum bits, that is, qubits. Ideally a qubit is a two-level quantum system, representing the logical states" 0" and" 1". In the two leading quantum computing platforms, superconducting flux qubit and trapped ions, quantum information encoded in the qubit is prone to leakage. As a consequence, information leakage is one of the main sources of errors that affect our ability to perform successful computing on near-term quantum computing devices. This project develops and experimentally tests a novel quantum algorithm for detecting specific leakage errors in qubit systems by harnessing entanglement, which are the strong correlations in quantum systems. Thanks to these strong correlations, the algorithm allows an accurate detection of the leakage errors with substantially fewer experimental runs than required by state-of-the-art leakage detection protocols. Efficiently …

Date

2021

Authors

Amir Kalev, Itay Hen

Journal

NSF Award

Volume

20

Issue

2037300

Pages

37300