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DTSTAMP:20260905T204408Z
LAST-MODIFIED:20150217T145111Z
DTSTART:20150320T160000Z
DTEND:20150320T170000Z
UID:event1410@bu.edu
URL:http://physics.bu.edu/internal/events/show/1410
SUMMARY:Dynamics and Statistical Mechanics of Long-Range Interacting Partic
	les in a Parametrically Driven Periodic Potential
DESCRIPTION:Featuring Owen Myers\, University of Vermont\nHosted by: Anatol
	i Polkovnikov\n\nPart of the Biophysics/Condensed Matter Seminar Series.\n\
	nAbstract:\n It is well known that some driven systems undergo transitions 
	when the\nsystem parameter is changed adiabatically around its critical val
	ue. This\ntransition can be due to the change in the topological structure 
	of the\nphase space\, called a bifurcation. Depending on the type of change
	 in the\ntopological structure\, such transitions are well classified in th
	e theory\nof bifurcations. Among the driven systems\, the parametrically dr
	iven\nperiodic potentials (PDPP) are particularly interesting due to the\ni
	ntimate coupling between its time and spatial components. A unique\nexample
	 of such a system is Kapitza's pendulum\, which is a pendulum with\nan osci
	llating suspension point that can be made to stand stably in the\ninverted 
	position for certain driving frequency and amplitude.  In this\ntalk\, I wi
	ll present our work on understanding the dynamical behavior of\nmultiple pa
	rticles interacting through the simple Coulomb repulsion in a\nPDPP 1D pote
	ntial.  It is found that the tools of statistical mechanics\nmay be importa
	nt to the study of such systems\, instead of bifurcation\ntheory\, in order
	 to understand the transitions that occur in the chaotic\nregime.\n Though 
	the Coulomb and\, similarly\, the gravitational interactions of\nparticles 
	are prevalent in nature\, these long-range interactions are not\nwell under
	stood from the statistical mechanics perspective because they\nare not exte
	nsive or additive. I will also present a simple model for\nunderstanding lo
	ng-range interacting pendula\, finding interesting\nnon-equilibrium behavio
	r of the pendula angles. Namely\, that a\nquasistationary clustered state c
	an exist when pendula angles are\ninitially ordered by their index.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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