8-10 June 2016
Asia/Bangkok timezone

Entanglement in discrete-time two coupled harmonic oscillators

Not scheduled
15m
Poster presentation Statistical and Theoretical Physics

Speaker

Mr Watcharanon Kantayasakun (Department of physics,Faculty of science,King Mongkut's University of Technology Thonburi)

Description

We study entanglement for a coupled harmonic oscillator system both discrete-time level and continuous-time level through the linear entropy (LE). We find that the nature of entanglement is drastically different between these two levels of the time structure. In the continuous-time case, we find that LE increases with the increasing of coupling constant and the system slowly gets into a maximally entangled state at extremely large value of coupling constant. In contrast, in the discrete-time case, we find that LE decreases with the increasing of a coupling constant and is zero at a critical value of the coupling constant. After that LE will increase again with the increasing of the coupling constant and the system suddenly gets into a maximally entangled state at a particular value of the coupling constant called a cut-off value. We also find that the nature of entanglement at discrete-time level and continuous-time level eventually becomes identical under the continuum time limit. This result of study shows that the system at discrete-time level exhibits much more intriguing phenomena than the one at continuous-time level.

Primary author

Mr Watcharanon Kantayasakun (Department of physics,Faculty of science,King Mongkut's University of Technology Thonburi)

Co-authors

Dr Sikarin Yoo-Kong (Ratchaburi campus,King Mongkut's University of Technology Thonburi) Dr Watchara Liewrian (Department of Physics,Faculty of science,King Mongkut's University of Technology Thonburi)

Presentation materials

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