NCTS (South)


DATE2012-11-05

TIME12:10

PLACER49223, Second Physics Building , NCKU

FIELDQuantum Information Science

SPEAKER Dr. Yukihiro Ota - Digital Material Laboratory, Advanced Science Institute, RIKEN, Japan

TITLESystematic implementation of general quantum measurements in linear optical and superconducting qubits

ABSTRACT We show a systematic construction for implementing general measurements on a single qubit, including both strong (or projection) and weak measurements. We mainly focus on linear optical qubits. The present approach is composed of simple and feasible elements, i.e., beam splitters, wave plates, and polarizing beam splitters. We show how the parameters characterizing the measurement operators are controlled by the linear optical elements. We also propose a method for the implementation of general measurements in solid-state qubits.
Furthermore, we show an interesting application of the general measurements, i.e., entanglement amplification.

references:
[1]Y. Ota, S. Ashhab, and F. Nori, Phys. Rev. A 85, 043808 (2012)
[2]Y. Ota, S. Ashhab, and F. Nori, J. Phys. A:Math. Theor. 45, 415303 (2012)