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Journal of Shangluo University

The Quantum Phase Distributing Properties of A Coherent State's Opposition State

Feng Li

Published Jan 1, 2005• 0 citations
OpenAlex

Abstract

The Quantum phase distribution properties of a coherent state│α〉's opposition state│-α〉 is studied in this paper by using a concept of the Pegg-Barnett phase.It is found that the distributing of│-α〉 state present periodicity distribution center is displaced 180° which is compared with the coherent state changing with displace distance of the coherent state that is displaced from a vacuum state in complex plan.

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•Feb 15, 2000•11 citations
The Quantum phase distribution properties of a coherent state│α〉's opposition state│-α〉 is studied in this paper by using a concept of the Pegg-Barnett phase.It is found that the distributing of│-α〉 state present periodicity distribution center is displaced 180° which is compared with the coherent state changing with displace distance of the coherent state that is displaced from a vacuum state in complex plan.
Pegg-Barnett Quantum phase density distribution properties of amplitude coherent states are studied.It is find that:1.the Quantum phase density distribution of amplitude coherent states p(θ,m) is influenced by superposition angle φ which is the vacuum state |o〉superposed by coherent state|α〉,average photon number and θ-γ that is the quantum phase θ minus displace angle of coherent state γ.2.the quantum phase density distribution changes with φ and θ-γ periodically;it becomes large with increase of average photon numbers.Under certain conditions,extremums of quantum phase density distribution are restricted by φ and θ-γ.