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BEGIN:VEVENT
DTSTAMP:20260905T080223Z
LAST-MODIFIED:20170328T144343Z
DTSTART:20170407T160000Z
DTEND:20170407T170000Z
UID:event1743@bu.edu
URL:http://physics.bu.edu/internal/events/show/1743
SUMMARY:Interacting lattice systems with a model of quantum dissipation fro
	m a thermodynamic perspective
DESCRIPTION:Featuring Lode Pollet\n\nPart of the Biophysics/Condensed Matte
	r Seminar Series.\n\nQuantum dissipation arises when a large system can be 
	split in a quantum system and an environment where the energy of the former
	 flows to. We propose a conceptually simple approach to introduce the dissi
	pation into interacting quantum systems (the XXZ model) in a thermodynamica
	l context\, in which every site of the 1d lattice is coupled to its own bat
	h. In case of Ohmic diagonal coupling\, a bath-induced Bose liquid phase ca
	n occur in the ground state phase diagram away from half filling. This phas
	e is compressible\, gapless\, and conducting but not superfluid. At haf-fil
	ling\, only a Luttinger liquid and a density wave ordered phase are found. 
	The phase transition between them is of Kosterlitz-Thouless type where the 
	Luttinger parameter takes a non-universal value. In case of off-diagonal co
	upling\, we find a compressible zero-temperature state with spontaneous dis
	crete symmetry breaking and a thermal phase transition for a one-dimensiona
	l system. Our results are supported by  Quantum Monte Carlo path integral s
	imulations.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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