Quantum Erasing in a Modified Michelson Interferometer and Describing it by Shannon Entropy

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Khademi, Soroush | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47993 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Bahrampour, Alireza; Karimipour, Vahid
Abstract:
In some interferometric setups, the entanglement between the quanta’s path and another system makes the interference pattern vanish. In such situations, if we measure the ancillary system in an appropriate basis, we will find sub-ensembles of the output data which show interference. In this thesis, after reviewing the discussions of interferometry and wave-particle complementarity, we explain quantum erasing by some examples. Then we introduce a new setup for doing interferometry with single-photons. This setup is a modified Michelson interferometer in which the interaction between the photon and an atom trapped in a cavity bans the interference. We will do erasing by measuring the atom’s energy. Then we discuss and criticize different opinions about the essence of the erasing procedure. At end, we will try to describe quantum erasing in a special category of two-path interferometers by use of Shannon entropy
Keywords:
Wave-Particle Duality ; Complementarity Principle ; Bohr's Complementarity ; Michelson Interferometer ; Single Photon Interferometery ; Quantum Erasing ; Shannon Entropy