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Condensed Matter Seminars

ics Condensed Matter
Thursday, February 23, 2006
4:00 PM
Physics Building, Room 204
Note special time.
Note special room.
Vladimir Gritsev [Host: Paul Fendley]
Harvard University
"Full Counting Statistics From Interference Between Interacting Bose Liquids in One Dimension"
ABSTRACT:
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.

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