Session Q30: Focus Session: Superconducting Qubits: Architecture, Tunable, and Static Coupling
11:15 AM–2:15 PM, Wednesday, February 29, 2012
Room: 259B
Sponsoring Unit:
GQI
Chair: Chad Rigetti, IBM, Yorktown Heights, NY
Abstract ID: BAPS.2012.MAR.Q30.8
Abstract: Q30.00008 : Quantum gates by qubit frequency modulation in circuit QED
1:03 PM–1:15 PM
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Abstract 
Authors:
Felix Beaudoin
(Universite de Sherbrooke)
Marcus P. da Silva
(Disruptive Information Processing Technologies Group, Raytheon BBN Technologies)
Blake R. Johnson
(Disruptive Information Processing Technologies Group, Raytheon BBN Technologies)
Thomas A. Ohki
(Disruptive Information Processing Technologies Group, Raytheon BBN Technologies)
Zachary Dutton
(Disruptive Information Processing Technologies Group, Raytheon BBN Technologies)
Alexandre Blais
(Universite de Sherbrooke)
Several types of two-qubit gates have been realized experimentally in circuit QED. These are based, for example, on tuning the pair of qubits in resonance with each other [Majer, Nature 449, 443-447 (2007)] or on a microwave pulse on one qubit at the transition frequency of a second qubit [Chow, Phys. Rev. Lett. 107, 080502 (2011)]. Another realization is based on a sequence of blue-sideband transitions generated by microwave pulses [Leek, Phys. Rev. B 79, 180511(R) (2009)]. Here, we propose a different approach relying on oscillations of the qubit frequency using a flux-bias line. We explain how frequency modulation leads to tunable qubit-resonator and qubit-qubit interactions. We also show how this form of quantum control leads to faster (first-order) sideband transitions and consider applications to two-qubit gates.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.Q30.8