The next two days I am visiting the Physics Department at IIT Kharagpur. My host is Arghya Taraphder. I am giving my regular talk on "Emergent quantum matter". Here is the latest versions of the slides.
I have given this talk about half a dozen times now. Yet last time I gave it I realised there was a significant typo in the formula for the Hall resistance of the Fractional quantum Hall effect. It is amazing that neither I nor anyone in my audiences caught this typo before. I am not sure what that says...
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Remembering the student protestors who died 36 years ago
Memorial plaque in the Great Court of the University of Queensland today.

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Is it something to do with breakdown of the Born-Oppenheimer approximation? In molecular spectroscopy you occasionally hear this term thro...
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I welcome discussion on this point. I don't think it is as sensitive or as important a topic as the author order on papers. With rega...
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Nitrogen fluoride (NF) seems like a very simple molecule and you would think it would very well understood, particularly as it is small enou...
Regarding the idea of “macroscopic quantum” phenomena mentioned in the slides, there is a nuance that I’ve found is often overlooked. Perhaps it is best to simply quote from the introductory section of an old paper [Clarke et al., Science 239, 992 (1988)]: “As Leggett (1) has emphasized, one must distinguish carefully between macroscopic quantum phenomena originating in the superposition of a large number of microscopic variables and those displayed by a single macroscopic degree of freedom.”
ReplyDeleteThanks for the helpful comment.
ReplyDeleteI agree that this is an important distinction. In this talk I focus on the former, e.g. a single superconducting condensate.
The latter case is more exotic and an even more profound manifestation of quantum weirdness, e.g. interference between two superconducting condensates.