Coherence and Phase Measurements in Quantum Dots
Mordehai Heiblum (Weizmann Institute, Rehovot, Israel)

Jeudi 14 avril 2005

The Characteristics of electronic systems are usually studied via performing conductance measurements. Since the conductance of a system is proportional to the absolute value of the transmission coefficient of electrons through the system, coherence and phase information is being generally lost.

I will report on measurements of coherence and phase of systems serving as ’artificial atoms’, namely, zero dimensional like electron puddles, called quantum dots as the number of electrons increases.

I will show results that verify that the transmission phase is a highly sensitive parameter to physics taking place in the quantum dots, revealing properties that are not observed via conductance measurements.