Improved Error-Scaling for Adiabatic Quantum State Transfer

Details Improved Error-Scaling for Adiabatic Quantum State Transfer Improved Error-Scaling for Adiabatic Quantum State Transfer

2011-05-31

arxiv.org/abs/1105.6268v2

New J. Phys. 14 013024 (2012)

Physics

Quantum Physics

10 Pages, 4 figures. Comments are welcome. Version substantially revised to generalize results to cases where several derivati

Scientific paper

10.1088/1367-2630/14/1/013024

We present a technique that dramatically improves the accuracy of adiabatic state transfer for a broad class of realistic Hamiltonians. For some systems, the total error scaling can be quadratically reduced at a fixed maximum transfer rate. These improvements rely only on the judicious choice of the total evolution time. Our technique is error-robust, and hence applicable to existing experiments utilizing adiabatic passage. We give two examples as proofs-of-principle, showing quadratic error reductions for an adiabatic search algorithm and a tunable two-qubit quantum logic gate.

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