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BEGIN:VEVENT
DTSTAMP:20261023T233947Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20101013T140000Z
DTEND:20101013T150000Z
UID:event711@bu.edu
URL:http://physics.bu.edu/internal/events/show/711
SUMMARY:Zero-energy states in two-dimensional superconductors: Creating a c
	hain of Majorana fermions
DESCRIPTION:Featuring Titus Neupert\, Paul Scherrer Institut\n\nPart of the
	 Condensed Matter Theory Seminar Series.\n\nAbstract: Majorana fermions wer
	e originally proposed as a model for\nneutrinos in high-energy physics and 
	have the defining property that they are their own anti-particles. Partly b
	ecause of its potential application to topological quantum computation\, th
	is concept has attracted revived interest in the form of certain many-body 
	states in condensed-matter physics. I will discuss how Majorana states emer
	ge in two different two-dimensional systems: as zero-energy states bound to
	 vortices at superconducting interfaces which lack inversion symmetry and i
	n vortices of superconducting surface states of three-dimensional topologic
	al insulators. The specific properties of these systems will then be used t
	o propose a heterostructure that can host a chain of equally spaced vortice
	s in the superconducting order parameter\, each of which binds a Majorana s
	tate. It turns out that the overlap integral of neighboring Majorana states
	 can be controlled by the position of the chemical potential. Equipped with
	 this property\, such a heterostructure could in principle serve as a one-d
	imensional circuit path for Majorana fermions.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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