Quick Navigation

Overview Topics Abstract Importance Paper Tools References Reactions Discussion Publication Related

Topics

Superconducting Qubits Open Quantum Systems Decoherence

Measurements of Quasiparticle Tunneling Dynamics in a Bandgap-Engineered Transmon Qubit

arXiv
Authors: L. Sun, L. DiCarlo, M. D. Reed, G. Catelani, Lev S. Bishop, D. I. Schuster, B. R. Johnson, Ge A. Yang, L. Frunzio, L. I. Glazman, M. H. Devoret, R. J. Schoelkopf

Year

2011

Paper ID

29265

Status

Preprint

Abstract Read

~2 min

Abstract Words

119

Citations

N/A

Abstract

We have engineered the bandgap profile of transmon qubits by combining oxygen-doped Al for tunnel junction electrodes and clean Al as quasiparticle traps to investigate energy relaxation due to quasiparticle tunneling. The relaxation time T1 of the qubits is shown to be insensitive to this bandgap engineering. Operating at relatively low EJ/EC makes the transmon transition frequency distinctly dependent on the charge parity, allowing us to detect the quasiparticles tunneling across the qubit junction. Quasiparticle kinetics have been studied by monitoring the frequency switching due to even/odd parity change in real time. It shows the switching time is faster than 10 μs, indicating quasiparticle-induced relaxation has to be reduced to achieve T1 much longer than 100 μs.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
  • It adds a 2011 reference point for readers tracking recent quantum research.
  • We have engineered the bandgap profile of transmon qubits by combining oxygen-doped Al for tunnel junction electrodes and clean Al as quasiparticle traps to investigate energy...

Paper Tools

Become a member to use research tools

Sign in to open papers, visit source links, share, cite, compare, copy DOI links, request category corrections, and build your reading list.

Become a member Sign in
Show Paper arXiv Publisher Share Cite This Paper Copy URL Compare Copy DOI Add to Reading List Category Correction Request

References & Citation Signals

[1] DOI https://doi.org/arXiv:1112.2621 [2] arXiv https://arxiv.org/abs/1112.2621 [3] Publisher https://arxiv.org/abs/1112.2621

Local Citation Graph (Related-Paper Links)

Current Paper #29265 #78837 TLS loss in superconducting res... #78829 Graphene double quantum dot as ... #78817 Modelling Josephson Junctions w... #78809 A quasiparticle-protected super...

External citation index: OpenAlex citation signal

Community Reactions

Quick sentiment from readers on this paper.

Score: 0
Likes: 0 Dislikes: 0

Sign in to react to this paper.

Discussion & Reviews (Moderated)

Average Rating: 0.0 / 5 (0 ratings)

No written reviews yet.