Leakage detection for a transmon-based surface code

Abstract Leakage outside of the qubit computational subspace, present in many leading experimental platforms, constitutes a threatening error for quantum error correction (QEC) for qubits. We develop a leakage-detection scheme via Hidden Markov models (HMMs) for transmon-based implementations of the...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Boris Mihailov Varbanov, Francesco Battistel, Brian Michael Tarasinski, Viacheslav Petrovych Ostroukh, Thomas Eugene O’Brien, Leonardo DiCarlo, Barbara Maria Terhal
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/ae09303afbb4483cbb08b5f96b9e808d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:ae09303afbb4483cbb08b5f96b9e808d
record_format	dspace
spelling	oai:doaj.org-article:ae09303afbb4483cbb08b5f96b9e808d2021-12-02T13:58:11ZLeakage detection for a transmon-based surface code10.1038/s41534-020-00330-w2056-6387https://doaj.org/article/ae09303afbb4483cbb08b5f96b9e808d2020-12-01T00:00:00Zhttps://doi.org/10.1038/s41534-020-00330-whttps://doaj.org/toc/2056-6387Abstract Leakage outside of the qubit computational subspace, present in many leading experimental platforms, constitutes a threatening error for quantum error correction (QEC) for qubits. We develop a leakage-detection scheme via Hidden Markov models (HMMs) for transmon-based implementations of the surface code. By performing realistic density-matrix simulations of the distance-3 surface code (Surface-17), we observe that leakage is sharply projected and leads to an increase in the surface-code defect probability of neighboring stabilizers. Together with the analog readout of the ancilla qubits, this increase enables the accurate detection of the time and location of leakage. We restore the logical error rate below the memory break-even point by post-selecting out leakage, discarding less than half of the data for the given noise parameters. Leakage detection via HMMs opens the prospect for near-term QEC demonstrations, targeted leakage reduction and leakage-aware decoding and is applicable to other experimental platforms.Boris Mihailov VarbanovFrancesco BattistelBrian Michael TarasinskiViacheslav Petrovych OstroukhThomas Eugene O’BrienLeonardo DiCarloBarbara Maria TerhalNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 6, Iss 1, Pp 1-13 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Boris Mihailov Varbanov Francesco Battistel Brian Michael Tarasinski Viacheslav Petrovych Ostroukh Thomas Eugene O’Brien Leonardo DiCarlo Barbara Maria Terhal Leakage detection for a transmon-based surface code
description	Abstract Leakage outside of the qubit computational subspace, present in many leading experimental platforms, constitutes a threatening error for quantum error correction (QEC) for qubits. We develop a leakage-detection scheme via Hidden Markov models (HMMs) for transmon-based implementations of the surface code. By performing realistic density-matrix simulations of the distance-3 surface code (Surface-17), we observe that leakage is sharply projected and leads to an increase in the surface-code defect probability of neighboring stabilizers. Together with the analog readout of the ancilla qubits, this increase enables the accurate detection of the time and location of leakage. We restore the logical error rate below the memory break-even point by post-selecting out leakage, discarding less than half of the data for the given noise parameters. Leakage detection via HMMs opens the prospect for near-term QEC demonstrations, targeted leakage reduction and leakage-aware decoding and is applicable to other experimental platforms.
format	article
author	Boris Mihailov Varbanov Francesco Battistel Brian Michael Tarasinski Viacheslav Petrovych Ostroukh Thomas Eugene O’Brien Leonardo DiCarlo Barbara Maria Terhal
author_facet	Boris Mihailov Varbanov Francesco Battistel Brian Michael Tarasinski Viacheslav Petrovych Ostroukh Thomas Eugene O’Brien Leonardo DiCarlo Barbara Maria Terhal
author_sort	Boris Mihailov Varbanov
title	Leakage detection for a transmon-based surface code
title_short	Leakage detection for a transmon-based surface code
title_full	Leakage detection for a transmon-based surface code
title_fullStr	Leakage detection for a transmon-based surface code
title_full_unstemmed	Leakage detection for a transmon-based surface code
title_sort	leakage detection for a transmon-based surface code
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/ae09303afbb4483cbb08b5f96b9e808d
work_keys_str_mv	AT borismihailovvarbanov leakagedetectionforatransmonbasedsurfacecode AT francescobattistel leakagedetectionforatransmonbasedsurfacecode AT brianmichaeltarasinski leakagedetectionforatransmonbasedsurfacecode AT viacheslavpetrovychostroukh leakagedetectionforatransmonbasedsurfacecode AT thomaseugeneobrien leakagedetectionforatransmonbasedsurfacecode AT leonardodicarlo leakagedetectionforatransmonbasedsurfacecode AT barbaramariaterhal leakagedetectionforatransmonbasedsurfacecode
_version_	1718392220947578880

Leakage detection for a transmon-based surface code

Ejemplares similares