arXiv subjects

Feng-yang Zhang

Publications and source records attributed to Feng-yang Zhang.

2 recordsLinked to original sources

arXiv2011

Direct scheme for measuring the geometric quantum discord

We propose a scheme to directly measure the exact value of geometric quantum discord of an arbitrary two-qubit state. We only need to perform the projective measurement in the all anti-symmetric subspace and our scheme is parametrically efficient in contrast to the widely adopted quantum state tomography scheme in the sense of less parameter estimations and projectors. Moreover, the present scheme can be easily realized with the current experimental techniques.

quant-ph↗

arXiv2011

Realizing flexible two-qubit controlled phase gate with a hybrid solid-state system

We propose a theoretical scheme for realizing °exible two-qubit controlled phase gate. A transmission line resonator is used to induce the coupling between nitrogen-vacancy (N-V) in diamond and superconducting qubit. The N-V center acts as control qubit and the superconducting qubit as target qubit. Through adjusting external flux, we obtain desired coupling between random superconducting qubit and transmission line resonator. Moreover, our protocol might be implemented via the current experimental technology.

quant-ph↗