A scalable readout system for a superconducting adiabatic quantum optimization system

Details A scalable readout system for a superconducting adiabatic quantum optimization system A scalable readout system for a superconducting adiabatic quantum optimization system

2009-05-06

arxiv.org/abs/0905.0891v3

Supercond. Sci. Technol. 23 (2010) 105014

Physics

Condensed Matter

Superconductivity

Updated for clarity, final version

Scientific paper

10.1088/0953-2048/23/10/105014

We have designed, fabricated and tested an XY-addressable readout system that is specifically tailored for the reading of superconducting flux qubits in an integrated circuit that could enable adiabatic quantum optimization. In such a system, the flux qubits only need to be read at the end of an adiabatic evolution when quantum mechanical tunneling has been suppressed, thus simplifying many aspects of the readout process. The readout architecture for an $N$-qubit adiabatic quantum optimization system comprises $N$ hysteretic dc SQUIDs and $N$ rf SQUID latches controlled by $2\sqrt{N} + 2$ bias lines. The latching elements are coupled to the qubits and the dc SQUIDs are then coupled to the latching elements. This readout scheme provides two key advantages: First, the latching elements provide exceptional flux sensitivity that significantly exceeds what may be achieved by directly coupling the flux qubits to the dc SQUIDs using a practical mutual inductance. Second, the states of the latching elements are robust against the influence of ac currents generated by the switching of the hysteretic dc SQUIDs, thus allowing one to interrogate the latching elements repeatedly so as to mitigate the effects of stochastic switching of the dc SQUIDs. We demonstrate that it is possible to achieve single qubit read error rates of $<10^{-6}$ with this readout scheme. We have characterized the system-level performance of a 128-qubit readout system and have measured a readout error probability of $8\times10^{-5}$ in the presence of optimal latching element bias conditions.

Affiliated with

Also associated with

No associations

Rating

A scalable readout system for a superconducting adiabatic quantum optimization system 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 A scalable readout system for a superconducting adiabatic quantum optimization system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A scalable readout system for a superconducting adiabatic quantum optimization system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-542704