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DTSTAMP:20260913T011626Z
LAST-MODIFIED:20190611T141826Z
DTSTART:20190612T173000Z
DTEND:20190612T183000Z
UID:event2141@bu.edu
URL:http://physics.bu.edu/internal/events/show/2141
SUMMARY:Floquet-engineering Counterdiabatic Protocols in Quantum Many-body 
	Systems
DESCRIPTION:Featuring Mohit Pandey\n\nPart of the Preliminary Oral Exam.\n\
	nExamining Committee: David Campbell\, Anatoli Polkovnikov\, Alexander Sush
	kov\, A. Liam Fitzpatrick\n\nAbstract:\n\nNoise and decoherence caused by t
	he environment are two major challenges in applying adiabatic protocols to 
	quantum technologies. Counter-diabatic (CD) driving protocols\, which are a
	lso known as "shortcuts-to-adiabaticity"\,  provide powerful alternatives f
	or controlling a quantum system.  While CD driving is theoretically known\,
	 obtaining and implementing it in many-body systems is a formidable task\, 
	requiring knowledge of the spectral properties of the instantaneous Hamilto
	nians and control of highly nonlocal multibody interactions. We show how an
	 approximate gauge potential can be systematically built up as a series of 
	nested commutators\, remaining well-defined in the thermodynamic limit. Fur
	thermore\, the resulting CD driving protocols can be realized up to arbitra
	ry order without leaving the available control space using tools from Floqu
	et engineering.  We apply this approach to a qubit and experimentally demon
	strate its robust performance with the electronic spin of a Nitrogen-vacanc
	y center in diamond [1]. Moreover\, we also apply this to few- and many-bod
	y quantum systems\, where the resulting Floquet protocols significantly sup
	press dissipation and provide a drastic increase in fidelity [2].\n\n[1] *B
	oyers\, E.\, *Pandey\, M.\, Campbell\, D. K.\, Polkovnikov\, A.\, Sels\, D.
	\, & Sushkov\, A. O. (2018). Floquet-engineered quantum state manipulation 
	in a noisy qubit. arXiv preprint arXiv:1811.09762.\n\n[2] Claeys\, P. W.\, 
	Pandey\, M.\, Sels\, D.\, & Polkovnikov\, A. (2019). Floquet-engineering co
	unterdiabatic protocols in quantum many-body systems. arXiv preprint arXiv:
	1904.03209
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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