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BEGIN:VEVENT
DTSTAMP:20261013T040806Z
LAST-MODIFIED:20200804T182130Z
DTSTART:20200813T183000Z
DTEND:20200813T193000Z
UID:event2352@bu.edu
URL:http://physics.bu.edu/internal/events/show/2352
SUMMARY:Realizing a synthetic topological insulator with a quasi-periodical
	ly driven qubit
DESCRIPTION:Featuring Eric Boyers\, Boston University\, Physics Department\
	n\nPart of the Preliminary Oral Exam.\n\nSynthetic dimensions are a class o
	f techniques which extend the effective\ndimensionality of a system by intr
	oducing additional degrees of freedom that\nmimic spatial dimensions. These
	 techniques have emerged as a major area\nof research in recent years as a 
	means to enrich the physics accessible by experiments and study phenomena t
	hat cannot be easily realized in real space.\nSynthetic topological systems
	 in particular have received much attention due\nto their close connection 
	with topological pump systems and their potential\napplications in quantum 
	simulation and devices.\nWhile synthetic topological systems have been demo
	nstrated in a number of platforms\, few attempts have been made to realize 
	them in few-level\nsystems. The long coherence times\, robust read-out tech
	niques\, and precise controls of the Hamiltonians of solid state qubits mak
	e them promising\ncandidates for creating synthetic topological systems.\nI
	n this talk\, I present an experimental demonstration of a model that\nreal
	izes a synthetic topological insulator in a qubit using a quasi-periodicall
	y\ndriven Nitrogen-vacancy center. By measuring the evolution of the overla
	p of\nstates prepared at nearby points in the synthetic Brillioun zone\, we
	 perform\na Loschmidt echo-like experiment that directly probes the Berry c
	urvature\nand allows for the measurement of the Chern number. We find that 
	the\nChern number is integer quantized as expected and we use it to map out
	\nthe phase diagram of the model. Our results show close agreement with\nth
	eory\, including an effective half-integer Chern number at a critical point
	 in\nthe model. This work establishes the feasibility of quasi-periodically
	 driven\nqubits as a platform for synthetic dimensions and lays the groundw
	ork for\npossible device applications such as frequency converters.\n\n----
	---\nJoin Zoom Meeting\nhttps://bostonu.zoom.us/j/93594413952?pwd=TTJvNk9Za
	TREOGg5TUs3RlJSVW9OZz09\n\nMeeting ID: 935 9441 3952\nPasscode: topology\nO
	ne tap mobile\n+13017158592\,\,93594413952# US (Germantown)\n+13126266799\,
	\,93594413952# US (Chicago)
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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