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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-4651
DTSTART:20171130T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T021654Z
LAST-MODIFIED:20171205T144155Z
LOCATION:5310 Chamberlin Hall
SUMMARY:From Cat State to Entangled Cat State – Experimental Realiza
 tion in Circuit QED\, R. G. Herb Condensed Matter Seminar\, Chen Wang\
 , University of Massachusetts\, Amherst
DESCRIPTION:Quantum superpositions of distinct coherent states in a si
 ngle-mode harmonic oscillator have been known as the (Schrödinger) ca
 t states\, drawing analogy between the quasi-classical nature of a coh
 erent state to the state of a macroscopic entity.  Creation and contro
 l of such cat states have been a hallmark of the modern quantum contro
 l era and lay the foundation for an interesting class of oscillator-ba
 sed quantum information processing scheme.  Here we take one step furt
 her and present experimental demonstration of entangled cat state of e
 lectromagnetic fields in two microwave cavities bridged by a supercond
 ucting artificial atom.  We present full quantum state tomography of t
 his two-mode cat state over a Hilbert space exceeding 100 dimensions v
 ia quantum non-demolition measurements of the joint photon number pari
 ty.  The ability to manipulate such multi-cavity quantum states paves 
 the way for logical operations between redundantly encoded qubits for 
 fault-tolerant quantum computation and communication.
URL:https://www.physics.wisc.edu/events/?id=4651
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