Ignorance is Strength: Quantum Measurements in a Non Local World

by Aharon Brodutch

at Special seminar

Wed, 27 Dec 2017, 10:00
Physics Building (#54) Room 207


In quantum theory we often use the term observable interchangeably with Hermitian operator However not all Hermitian operators correspond to quantities that can be observed in the usual quantum mechanical sense i e a projective measurement Causality the finite speed of light and measurement disturbance relations impose constraints on the types of non local observables that can be measured without additional resources such as communication i e time and or entanglement Unfortunately there are no generic methods to identify and quantify the types of resources necessary to measure a specific non local observable while maintaining ignorance about the local properties I will present a number of cases where the resource requirements are surprising and present a probabilistic protocol for an instantaneous measurement of an important class of observables that correspond to interaction terms in a Hamiltonian I will then show how we are currently using this protocol in an optical implementation of the quantum pigeonhole paradox effectively creating photon photon interactions

Created on 21-12-2017 by Bar Lev, Yevgeny (ybarlev)
Updaded on 21-12-2017 by Bar Lev, Yevgeny (ybarlev)