简介: |
报告摘要：
The famous “quantum jump” of an atom from one level to another was first postulated by Bohr in 1913, nearly 100 years ago. Can there still be anything interesting to say about quantum jumps in a two- level atom today, nearly 100 years later? Of course my answer is “yes”, as I will be talking about two recent papers in this area [1,2]. The most recent [2] proposes experiments to definitively prove that quantum jumps are not due to emission of a photon, but rather to detection. Such a test is possible because different types of detection lead to different types of jumps. The other [1] shows that this flexibility in causing jumps of different types can be used creatively to make an atom jump between a two fixed states even when it is coherently driven by a laser.
[1] R. Karasik and H. M. Wiseman, How Many Bits Does It Take to Track an Open Quantum System? Phys. Rev. Lett. 106, 020406 (4 pages) (2011).
[2] Howard M. Wiseman and Jay M. Gambetta, Are Dynamical Quantum Jumps Detector-Dependent? Phys. Rev. Lett. 108, 220402 (5 pages) (2012).
报告人简介：
Professor Wiseman is best known for his work in quantum measurement and control, but has also published in quantum information, open quantum systems, quantum foundations and early mediaeval history. He is a Fellow of the Australian Academy of Science, a Fellow of the American Physical Society, and Director of the Centre for Quantum Dynamics at Griffith University.
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