12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Entanglement dynamics in an oscillating bipartite Gaussian state coupled to reservoirs with different temperatures

14 Jul 2011, 11:00


Oral Presentation Track G - Theoretical and Computational Physics Theoretical


Dr Anne Ghesquiere (National Institute for Theoretical Physics)


An entangled bipartite Gaussian state is coupled to two thermal reservoirs, one for each particle. A harmonic oscillation is allowed between the two particles. The reservoirs are assumed to have different temperatures and to be coupled to the particles with different coupling strengths. This allows for a realistic situation where a bipartite state may be shared between two parties who ”keep” their part in different environments. A master equation, previously derived in the non-rotating wave approximation, is solved for the system. The effects of a variation in the bath temperature on the entanglement, as well as that of the variation in coupling strengths are shown. For high temperatures, the entanglement vanishes if the coupling strength is large, whereas for low temperatures, the effect is reversed and it survives longest for a stronger coupling strength. The stationary dynamics of the system is also examined.

Consider for a student <br> &nbsp; award (Yes / No)? No
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? Yes
Level (Hons, MSc, <br> &nbsp; PhD, other)? Postdoctoral Fellow

Primary author

Dr Anne Ghesquiere (National Institute for Theoretical Physics)


Prof. Francesco Petruccione (National Institute for Theoretical Physics) Dr Ilya Sinayskiy (National Institute for Theoretical Physics)

Presentation Materials