Next week's seminars

[Cond.Matt. & Stat.Mech.Section]

JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR



Tuesday, 23 April -   11:30 hrs.

 

Luigi Stasi Seminar Room -    ICTP Leonardo Building - 1st floor



Mikhail KISELEV   ( ICTP )

 

"Landau - Zener interferometry with   double and triple quantum dots"

 
Abstract

 

In this talk I will review general non-adiabatic theories of two- and three- level crossings subject to fast and slow Gaussian noise.

The applications to recent experiments on Landau - Zener interferometry in double/triple quantum dots and superconducting qubits will be discussed.

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SEMINAR on   Disorder and strong electron correlations

 


Thursday, 25 April -  11:30 a.m.


 

Luigi Stasi Seminar Room,  Leonardo Building - first floor

 



Jean-Philippe BRANTUT   (E.T.H. Zürich)

 

"Conduction properties of ultracold Fermions"

 


Abstract

 

We experimentally study the transport process of ultracold fermionic atoms through a mesoscopic, quasi two-dimensional channel connecting macroscopic reservoirs.  By observing the current response to a bias applied between the reservoirs, we directly access the resistance of the channel in a manner analogous to a solid state conduction measurement.  The resistance is further controlled by a gate potential reducing the atomic density in the channel, like in a field effect transistor.  In this setup, we study the flow of a strongly interacting Fermi gas, and observe a striking drop of resistance with increasing density in the channel, as expected at the onset of superfluidity.  The resistance is compared to that of an ideal Fermi gas in the same geometry, which shows an order of magnitude larger resistance, originating from the contact resistance between the channel and the reservoirs.  We extended this investigation to disordered superfluids and provide evidences for a disorder-induced breakdown of superfluidity.