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VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
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BEGIN:VEVENT
DTSTAMP:20261017T181342Z
LAST-MODIFIED:20200428T191522Z
DTSTART:20200515T160000Z
DTEND:20200515T170000Z
UID:event2336@bu.edu
URL:http://physics.bu.edu/internal/events/show/2336
SUMMARY:Cluster phase space and variational subspace approaches to the quan
	tum many-body problem
DESCRIPTION:Featuring Jonathan Wurtz\, Boston University\, Physics Departme
	nt\n\nPart of the PhD Final Oral Exams.\n\nABSTRACT:\nSimulating the nonequ
	ilibrium behavior of interacting quantum systems is an important way to und
	erstand results of experimental quantum simulators\, motivate new materials
	\, and refine new quantum algorithms. However\, this is a challenging task 
	due to the exponential difficulty of such systems\, which motivates dimensi
	onal reduction methods\, such as semiclassical limits. This work extends se
	miclassical phase space methods to spin systems with no clear classical lim
	it with the cluster truncated Wigner approximation (cTWA)\, and improves on
	 Schrieffer-Wolff low energy effective dynamics with variational adiabatic 
	generators. The cTWA was used to compute nonequilibrium dynamics in spin ch
	ains\, finding behavior such as signatures of many body localization; rapid
	 thermalization and preservation of fluctuations; effective thermodynamic c
	lassical behaviors; and signatures of quantum chaos and butterfly velocitie
	s\, in 1d spin 1/2 chains. Variational Schrieffer-Wolff methods were used t
	o find efficient non-perturbative dressings for the Hubbard model and find 
	effective quasiparticle dynamics and nonthermal states in quantum chaotic s
	pin chains. These methods are potentially effective tools to separate essen
	tial quantum behavior from classical behavior\, and can be used to diagnose
	 quantum thermalization behavior in interacting quantum systems.\n\nCOMMITT
	EE MEMBERS:\nAnatoli Polkovnikov (Advisor)\nChris Laumann\nLiam Fitzpatrick
	\nBill Klein\nAlex Sushkov\n\n------\n\nJoin Zoom Meeting\nhttps://bostonu.
	zoom.us/j/96051464977\n\nMeeting ID: 960 5146 4977\nOne tap mobile\n+164687
	69923\,\,96051464977# US (New York)\n\nDial by your location\n        +1 64
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	 346 248 7799 US (Houston)\nMeeting ID: 960 5146 4977\nFind your local numb
	er: https://bostonu.zoom.us/u/adYOVu3WBX
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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