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BEGIN:VEVENT
DTSTAMP:20260917T022011Z
LAST-MODIFIED:20190325T171407Z
DTSTART:20190403T200000Z
DTEND:20190403T210000Z
UID:event2077@bu.edu
URL:http://physics.bu.edu/internal/events/show/2077
SUMMARY:Floquet-engineering counterdiabatic protocols in quantum many-body 
	systems
DESCRIPTION:Featuring Pieter Claeys \, Boston University\, Physics Departme
	nt\n\nPart of the Biophysics/Condensed Matter Seminar Series.\n\nCounterdia
	batic driving is a way of generating adiabatic dynamics at arbitrary pace\,
	 where excitations due to non-adiabaticity can be exactly compensated using
	 the adiabatic gauge potential. However\, obtaining and implementing this g
	auge potential in many-body systems is a formidable task\, requiring knowle
	dge of the spectral properties of the instantaneous Hamiltonians and contro
	l of highly nonlocal multibody interactions. We show how an approximate gau
	ge potential can be built up as a series of nested commutators\, which can 
	be easily obtained and used to systematically suppress excitations. This ga
	uge potential can then be generated up to arbitrary order using tools from 
	periodically-driven (Floquet) systems through resonant oscillations of the 
	instantaneous Hamiltonian with the driving term\, such that approximate cou
	nterdiabatic driving protocols can be realized without leaving the availabl
	e control space. This is illustrated on few- and many-body quantum systems\
	, where the resulting Floquet protocols provide a drastic increase in fidel
	ity and suppressed dissipation.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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