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Seminar: Topical Issues of Theoretical Physics: Talk on 12.02.2019

Organiser:
1. Institut für Theoretische Physik
2. Institut für Theoretische Physik
3. Institut für Theoretische Physik
4. Institut für Theoretische Physik

Introduction to the quantum first detection problem

Eli Barkai (Physics Department Bar-Ilan University Ramat-Gan)

We consider quantum dynamics on a graph, with repeated strong measurements per- formed locally at a fixed time interval τ . For example a particle starting on node χ and measurements performed on another node χ´. From the basic postulates of quantum mechanics the string of measurements yields a sequence no,no,no, ∙∙∙ and finally in the n-th attempt a yes, i.e. the particle is detected. Statistics of the first detection time nτ are investigated, and compared with the corresponding classical first passage problem. Dark states, Zeno physics, a quantum renewal equation, winding number for the first return problem (work of A. Grunbaum et al.), total detection probability, detection time operators and time wave functions are discussed.

Room: University, Room 4.331 (NWZ II), Pfaffenwaldring 57, Stuttgart-Vaihingen
Time: 1:15 pm

For questions and/or suggestions please contact Prof. Dr. Günter Wunner.

 

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