Abstract
We introduce a new type of superconducting charge qubit that has a V-shaped energy spectrum and uses quantum interference to provide independently tunable qubit energy and coherent coupling to a superconducting cavity. Dynamic access to the strong coupling regime is demonstrated by tuning the coupling strength from less than 200 kHz to greater than 40 MHz. This tunable coupling can be used to protect the qubit from cavity-induced relaxation and avoid unwanted qubit-qubit interactions in a multiqubit system.
Original language | English (US) |
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Article number | 083601 |
Journal | Physical review letters |
Volume | 106 |
Issue number | 8 |
DOIs | |
State | Published - Feb 22 2011 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy