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Junghee Ryu-Negative quasiprobability in an operational way
发布人:尹智  发布时间:2018-06-19   浏览次数:12


Title:Negative quasiprobability in an operational way


Speaker: Junghee Ryu, Centre for Quantum Technologies, National University of Singapore


Abstract:Negative probability was introduced by Feynman to address a mystery of quantum mechanics [1]. Since then such approach has been applied to investigate various kinds of quantum features such as quantum entanglement and superposition. However, the negativity of the probability distribution could lead to a conceptual problem on interpreting the quantity in terms of the frequency of the events occur. The meaning of the negative values in probability is not clear in an operational way. Recently, an operational quasiprobabilities (OQs) are introduced for qudits as well as optical fields states [2,3]. Here, we will discuss how the OQs deal with those problems and experimental results.


[1] R. Feynman, in Negative Probabilities in Quantum Mechanics, edited by B. Hiley and F. Peat (Routledge, London, 1987).
[2] J. Ryu, J. Lim, S. Hong, and J. Lee, Operational quasiprobabilities for qudit, Phys. Rev. A 88, 052123 (2013).
[3] J. Jae, J. Ryu, and J. Lee, Operational quasiprobabilities for continuous variables, Phys. Rev. A 96, 042121 (2017).


Time: 14:30--15:30,  July 13, Place:Room 522, Gewu Building