NCTS (South)


DATE2012-04-23

TIME12:00

PLACER49223, Second Physics Building , NCKU

FIELDQuantum Information Science

SPEAKER Dr. Guang-Yin Chen(陳光胤) - 成功大學物理系

TITLEQuantum Signatures In A Macroscopic Dipole Moment

ABSTRACTDemonstrating signatures of quantum mechanics in macroscopic objects has been a long-standing hurdle since the Schroedinger’s cat thought experiment. Here, a novel way to observe the quantummechanical behaviour of a macroscopic dipole moment in a large array of quantum wells is proposed. Taking advantage of the cooperative nature of the interaction between the field reservoir and the delocalized exciton in the quantum wells, the exciton dynamics, instead of being purely enhanced decay (superradiance), can reveal Rabi-like oscillations when the number of quantum wells exceeds several hundred. We further show that the oscillations of this “macroscopic” dipole moment in the multiple-quantum-well exhibit “signatures of quantumness” by using an extension of the Leggett-Garg inequality.