ELFT HÍRADÓ

[Andras Palyi <andraspalyi AT caesar.elte.hu>]

Az ELTE Nanofizika Szeminarium jovo hetfoi eloadasa:


Darazs Zoltan (Wigner FK SZFI): Parametric amplification of the  
mechanical vibrations of a suspended nanowire by magnetic coupling to  
a Bose-Einstein condensate


Idopont: 2013. oktober 21., hetfo, 10:15
Helyszin: ELTE Eszaki Tomb, 5.128-as terem (1117 Budapest, Pazmany  
Peter setany 1/A)


Kivonat:
"We show how the vibrational modes of a nanowire may be coherently  
manipulated with a Bose-Einstein condensate of ultracold atoms. We  
consider the magneto-mechanical coupling between paramagnetic atoms  
and a current carrying, suspended nanowire. Atomic spin flips produce  
a back-action onto the wire vibrations, which can lead to mechanical  
mode amplification. In contrast to systems considered before, the  
condensate has a finite energy bandwidth in the range of the chemical  
potential and we explore the consequences of this on the parametric  
drive. Applying the resolvent method, we find a non-trivial threshold  
detuning for the amplification and determine the threshold coupling."


Minden erdeklodot szivesen latunk.

A szeminarium tovabbi programja: 
http://wigner.elte.hu/koltai/science/?q=seminar

Udvozlettel,
Palyi Andras