Physics & Astronomy Quantum Nano Seminar - Dr. Mehdi Ahmadi, Santa Clara Univ.

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Physics & Astronomy Quantum Nano Seminar - Dr. Mehdi Ahmadi, Santa Clara Univ.

Title: "A Resource-Theoretic Perspective of the Wigner-Araki-Yanase (WAY) Theorem"

Thursday, December 13, 2018
4:00pm-5:00pm
Wilder 202
Intended Audience(s): Public
Categories: Lectures & Seminars

Abstract: The Wigner–Araki–Yanase (WAY) theorem establishes an important constraint that conservation laws impose on quantum mechanical measurements. We formulate the WAY theorem in the broader context of resource theories, where one is constrained to a subset of quantum mechanical operations described by a symmetry group. Establishing connections with the theory of quantum state discrimination we obtain optimal unitaries describing the measurement of arbitrary observables, explain how prior information can permit perfect measurements that circumvent the WAY constraint, and provide a framework that establishes a natural ordering on measurement apparatuses through a decomposition into asymmetry and charge subsystems. 

 
For more information, contact:
Tressena Manning
603-646-2854

Events are free and open to the public unless otherwise noted.