, Harvard University
[Host: Paul Fendley]
In my talk first I will give a general introduction in physics of
one-dimensional Bose condensates. Because of the absence of phase coherence,
the interference between one dimensional condensates gives rise to quantum
noise in the form of fluctuating fringe patterns. I describe the possible
experiments for measuring the probability distribution function of interference
fringe amplitudes. This probability distribution can be related to the boundary
sine-Gordon model which is also known in mesoscopic physics to describe an
impurity in a Luttinger liquid. The probability distribution function
demonstrates an interesting crossover from broad Poissonian distribution for
the case of impenetrable bosons to universal narrow asymmetric distributions at
weak interactions. Finally we argue that by measuring such distributions
experimentally, one can study the
properties of conformal field theories with negative central charge,
that appear in a variety of contexts ranging from stochastic growth
models to two dimensional quantum gravity.
Condensed Matter Seminar
Thursday, February 23, 2006
Physics Building, Room 204
Note special time.
Note special room.
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