1.2k citations
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Showing 2012 · quant-phShow all
3 papers · 2 filters
quant-ph2012★ 7 cited
On relation between geometric momentum and annihilation operators on a two-dimensional sphere
Q. H. Liu, Y. Shen, D. M. Xun +1
With a recently introduced geometric momentum that depends on the extrinsic curvature and offers a proper description of momentum on two-dimensional sphere, we show that the annihi…
quant-ph2012★ 5 cited
The negative probabilities and information gain in weak measurements
Xuanmin Zhu, Qun Wei, Quanhui Liu +1
We study the outcomes in a general measurement with postselection, and derive upper bounds for the pointer readings in weak measurement. Using the idea of weak measurement, we stud…
quant-ph2012★ 3 cited
Information gain versus coupling strength in quantum measurements
Xuanmin Zhu, Yuxiang Zhang, Quanhui Liu +1
We investigate the relationship between the information gain and the interaction strength between the quantum system and the measuring device. A strategy is proposed to calculate t…