The Efimov effect was traditionally thought to exist for
three or more particles in three spatial dimensions only.
In this seminar I will explore the much larger landscape of
universal few-body bound states of particles with short-range
resonant interactions. The key ideas are that one can use potentials
to constrain the spatial motion of particles (so that different particles
may move in different or the same dimensions), and that one can
consider three-body or even four-body short-range interactions.
In this way, one can have Efimov effect in one spatial dimension.
One can even have universal shallow bound states of TWO particles only,
whose energies form a geometric sequence, without using
a static point impurity or a spatially dependent scattering length.
10 Minute Talk Title:
Quantum flutter of supersonic particles in one-dimensional quantum liquids
We study the dynamics of an impurity injected at a supersonic velocity into
a 1D gas of hardcore bosons, or faster than the Fermi velocity in a fully
polarized Fermi gas. We find that at long times the momentum of the
impurity does not decay to zero, and demonstrate that the system exhibits a
new type of coherent oscillation in which the impurity vibrates with
respect to its correlation hole.
I received my B.S. from Tsinghua University (advisor: Lee Chang)
and an M.S. degree from the Institute of Theoretical Physics,
Chinese Academy of Sciences. I was a PhD student supervised
by Kathryn Levin at the University of Chicago.
I did a postdoc at the Institute for Nuclear Theory, University
of Washington, and a second postdoc at Yale University.
In 2010 I became an assistant professor at Georgia Institute of Technology.