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R. G. Herb Condensed Matter Seminars

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Events During the Week of November 26th through December 2nd, 2017

Monday, November 27th, 2017

No events scheduled

Tuesday, November 28th, 2017

No events scheduled

Wednesday, November 29th, 2017

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Thursday, November 30th, 2017

From Cat State to Entangled Cat State – Experimental Realization in Circuit QED
Time: 10:00 am
Place: 5310 Chamberlin Hall
Speaker: Chen Wang, University of Massachusetts, Amherst
Abstract: Quantum superpositions of distinct coherent states in a single-mode harmonic oscillator have been known as the (Schrödinger) cat states, drawing analogy between the quasi-classical nature of a coherent state to the state of a macroscopic entity. Creation and control of such cat states have been a hallmark of the modern quantum control era and lay the foundation for an interesting class of oscillator-based quantum information processing scheme. Here we take one step further and present experimental demonstration of entangled cat state of electromagnetic fields in two microwave cavities bridged by a superconducting artificial atom. We present full quantum state tomography of this two-mode cat state over a Hilbert space exceeding 100 dimensions via quantum non-demolition measurements of the joint photon number parity. 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.
Host: Vavilov
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Friday, December 1st, 2017

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