Exploring circuit quantum electrodynamics using a widely tunable superconducting resonator
Journal article, 2009

We have fabricated and characterized systems consisting of superconducting quantum bits (qubits) of the transmon type, coupled to a tunable transmission line resonator. The resonator consists of a superconducting quarter wavelength coplanar waveguide (CPW) resonator that is made tunable by terminating the transmission line to ground through a superconducting quantum interference device (SQUID). Here we present measurements on two devices where we observe Rabi oscillations as we drive the qubit, and vacuum Rabi splitting both as we tune the qubits into resonance with the resonator and as we tune the resonator into resonance with the qubits. We also observe coherent interaction between two resonant qubits. In addition, we demonstrate that we can calculate the response very accurately using a multilevel Hamiltonian.

SQUID

Qubits

Circuit-QED

Quantum computing

Josephson junction

Strong Coupling

Vacuum Rabi

Author

Martin Sandberg

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Fredrik Persson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Io Chun Hoi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Christopher Wilson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Per Delsing

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Physica Scripta

00318949 (ISSN) 14024896 (eISSN)

Vol. T137 Art. no. 014018-

Subject Categories

Condensed Matter Physics

DOI

10.1088/0031-8949/2009/T137/014018

More information

Created

10/6/2017