Improving Superconducting Qubit Lifetimes with Broadband Filters
ORAL
Abstract
In circuit quantum electrodynamics, the state of the qubit is read out via a resonator at a different frequency than that of the qubit. Spontaneous qubit decay via the resonator may be suppressed by engineering an impedance mismatch at the qubit frequency, while still allowing a large coupling between the resonator and external environment necessary for fast, high fidelity readout. We present a stepped-impedance filter with a large stop-band in the qubit frequency range and demonstrate its effect on qubit lifetime. This filter is also effective when used in an off-chip geometry.
*We acknowledge support from IARPA under contract W911NF-10-1-0324.
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Authors
Nicholas Bronn
IBM TJ Watson Research Center
IBM T J Watson Res Ctr
IBM T.J. Watson Research Center
Antonio Corcoles
IBM TJ Watson Research Center
IBM T J Watson Res Ctr
IBM T.J. Watson Research Center
Jared Hertzberg
IBM TJ Watson Research Center
IBM T J Watson Res Ctr
Srikanth Srinivasan
IBM TJ Watson Research Center
IBM T J Watson Res Ctr
IBM T.J. Watson Research Center
Jerry Chow
IBM TJ Watson Research Center, Yorktown Heights, NY, USA
IBM TJ Watson Research Center
IBM TJ Watson Research Center, Yorktown Heights NY, USA
IBM T J Watson Res Ctr
IBM T.J. Watson Research Center
Jay Gambetta
IBM TJ Watson Research Center, Yorktown Heights, NY, USA
IBM TJ Watson Research Center
IBM TJ Watson Research Center, Yorktown Heights NY, USA
IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA
IBM T J Watson Research Center
IBM T J Watson Res Ctr
IBM T.J. Watson Research Center
IBM T. J. Watson Research Center
Matthias Steffen
IBM TJ Watson Research Center, Yorktown Heights, NY, USA
IBM TJ Watson Research Center
IBM TJ Watson Research Center, Yorktown Heights NY, USA
