Interaction-Free Measurement in mesoscopic systems and the reduction postulate

Details Interaction-Free Measurement in mesoscopic systems and the reduction postulate Interaction-Free Measurement in mesoscopic systems and the reduction postulate

1996-07-31

arxiv.org/abs/quant-ph/9607029v2

Physics

Quantum Physics

Experimental consequences of the collapse time and the relativistic requirement are discussed for mesoscopic and optical syste

Scientific paper

We show that a noninvasive,``negative-result measurement'' can be realized in quantum dot systems. The measurement process is studied by applying the Schr\"odinger equation to the whole system (including the detector). We demonstrate that the possibility of observing a particular state out of coherent superposition leads to collapse of the corresponding nondiagonal density-matrix elements of the measured system. No additional reduction postulate is needed. Experimental consequences of the collapse time and the relativistic requirement are discussed for mesoscopic and optical systems.

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