[Landau ITP Seminars] Friday 21.06.2019

[Serge Krashakov]

Уважаемые сотрудники ИТФ,

На заседании Ученого совета ИТФ в пятницу 21 июня 2019 состоится 
коллоквиум с докладом:

Антон Андреев
*Двух-жидкостные явления в жидкостях Латтинжера*

One-dimensional quantum liquids are commonly treated using the Luttinger 
liquid theory, which neglects elementary excitations with high energies. 
In this approximation, in addition to the number of particles, energy, 
and momentum the liquid possesses another conserved quantity - J, which 
may be interpreted as the difference between the numbers of right- and 
left- moving particles. Beyond the Luttinger liquid approximation J is 
no longer conserved, but its relaxation time is exponentially long at 
low temperatures. I will show that as a result, one-dimensional quantum 
liquids exhibit two-fluid behavior. In particular in a wide frequency 
interval they support two sound modes that are similar to the first and 
second sound in superfluid He.
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