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BEGIN:VEVENT
DTSTAMP:20260726T042718Z
LAST-MODIFIED:20130404T121915Z
DTSTART:20130417T180000Z
DTEND:20130417T190000Z
UID:event899@bu.edu
URL:http://physics.bu.edu/internal/events/show/899
SUMMARY:Quantum Impurity Physics with Microwave Photons
DESCRIPTION:Featuring Moshe Goldstein\, Yale University\nHosted by: Claudio
	 Chamon\n\nPart of the Condensed Matter Theory Seminar Series.\n\nAbstract:
	\nWe consider the propagation of microwave photons along an array of\nsuper
	conducting grains with a set of weakly-coupled grains at its center.\nQuant
	um fluctuations of the charge on the weakly-coupled grains make the\nproces
	s of "photon splitting" effective. In such a process\, an incoming\nphoton 
	may be split into a number of photons of lower energy.  The minimal\nnumber
	 of photons so created depends on the symmetry properties of the\ncorrespon
	ding quantum impurity model. As an example\, we consider a specific\ncircui
	t allowing quantum fluctuations between two charge configurations of\ntwo w
	eakly-coupled grains\, thus mimicking the behavior of an anisotropic\nKondo
	 impurity. We relate the total rate of conversion of incoming photons\ninto
	 lower-energy ones to the linear dynamic spin susceptibility of the\nKondo 
	model. The spectral distribution of the outgoing photons yields\ninformatio
	n about higher-order local correlations in the quantum impurity\ndynamics.\
	nFinally\, we reveal a relation between this problem and transport along th
	e\nedge of a 2D topological insulator coupled to a magnetic impurity.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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