Date of Submission

Spring 2015

Academic Programs and Concentrations


Project Advisor 1

Matthew Deady

Project Advisor 2

Paul Cadden-Zimansky

Abstract/Artist's Statement

This paper investigates a recently discovered geometric representation of two-qubit states, the Quantum Steering Ellipsoid, by exploring quantum state measurements on mixtures of polarization-entangled photons produced using spontaneous parametric down conversion (SPDC). Measurements of the second photon of a mixed biphoton system that are conditioned on observations of the first photon demonstrate all possible Bloch Vectors that the second photon can be collapsed to by way of ''steering,'' which is only possible due to the nonlocal nature of entangled systems. This paper examines methods to experimentally verify the Quantum Steering Ellipsoid as a geometric classification of quantum states.

Open Access Agreement

Open Access

Creative Commons License

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