Event

Nov 09, 2017 4:00 pm - Nielsen Hall 170 - Colloquium
Chris Greene - Purdue
The Biggest Little Molecules in Nature

This talk will discuss recent experimental and theoretical progress relating to two different classes of huge, strange molecules of the order of 1000 Bohr radii, which are composed of only 2-4 atoms.  One class consists of a Rydberg atom interacting with a ground state atom, sometimes referred to as a "trilobite molecule", where there has been exciting experimental progress in the Shaffer group and in other groups around the world.  This talk will describe the basic theory as well as the new and unusual classes of Rydberg molecules that can be created in this manner.  The second class of huge molecules to be discussed consists of only 3 or 4 ground state atoms, also bound at comparably large internuclear distances, but by a counter-intuitive mechanism related to the so-called Efimov effect.  Here again, experimental and theoretical progress has recently been exciting and points to intriguing new regimes of quantal resonance and interference phenomena.

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