演讲人： 邓慧 密西根大学
时间： 2011-06-09 15:30-2011-06-09 16:30
地点：FIT 1-222
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内容：
Light has both polarization and orbital angular momentum. The former has two orthogonal states and have been widely exploited as qbits in quantum information science. The latter, has infinite number of orthogonal states, is a candidate as qdits for quantum computing in higher-dimensional Hilbert spaces and quantum communication with high information capacities. There are very limited ways to measure the orbital-angular momentum (OAM) state of light when it is not an eigen-state of OAM. In this talk, I will briefly introduce OAM of light, quantum counter-factual measurements, and quantum Zeno effect. Then I will introduce a scheme to sort OAM of light utilizing the quantum counter-factual measurement and quantum Zeno effect. The scheme requires only one interferometer and can separate different OAM components of an unknown input state into different, pre-determined, time intervals at the output, with
