Coupling Superconducting Qubits via a Cavity Bus

Details Coupling Superconducting Qubits via a Cavity Bus Coupling Superconducting Qubits via a Cavity Bus

2007-09-13

arxiv.org/abs/0709.2135v1

Nature 449, 443-447 (27 September 2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 figures, to be published in Nature

Scientific paper

10.1038/nature06184

Superconducting circuits are promising candidates for constructing quantum bits (qubits) in a quantum computer; single-qubit operations are now routine, and several examples of two qubit interactions and gates having been demonstrated. These experiments show that two nearby qubits can be readily coupled with local interactions. Performing gates between an arbitrary pair of distant qubits is highly desirable for any quantum computer architecture, but has not yet been demonstrated. An efficient way to achieve this goal is to couple the qubits to a quantum bus, which distributes quantum information among the qubits. Here we show the implementation of such a quantum bus, using microwave photons confined in a transmission line cavity, to couple two superconducting qubits on opposite sides of a chip. The interaction is mediated by the exchange of virtual rather than real photons, avoiding cavity induced loss. Using fast control of the qubits to switch the coupling effectively on and off, we demonstrate coherent transfer of quantum states between the qubits. The cavity is also used to perform multiplexed control and measurement of the qubit states. This approach can be expanded to more than two qubits, and is an attractive architecture for quantum information processing on a chip.

Affiliated with

Also associated with

No associations

Rating

Coupling Superconducting Qubits via a Cavity Bus does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coupling Superconducting Qubits via a Cavity Bus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupling Superconducting Qubits via a Cavity Bus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-215414