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Lecture Miriam Blaauboer


23 March 2004 FWN-Building 5113.0202, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Miriam Blaauboer
Affiliation: TU Delft
Title: Proposal for a Bell test using a double quantum dot turnstile
Date: Tue Mar 23, 2004
Start: 15.00
Location: FWN-Building 5113.0202
Host: Caspar van der Wal
Telephone: +31 50 363 4555


Bell's inequality is a quantitative criterion that can be used to test whether quantum mechanics is a local and realistic theory or not. Nearly all experiments which test this inequality were done using photons, and so far none exist for electrons. Achieving the latter is one of the challenges in condensed-matter physics today, and several proposals for Bell tests in various solid-state environments have recently appeared, but none of them has been realized yet. In this presentation a theoretical scheme for a test of Bell's inequality in a double quantum dot semiconductor structure will be discussed. The scheme is based on two entangled electron spins (a spin singlet), which are separated, coherently manipulated by externally applied fields and independently detected. By developing a model, based on a Master equation approach, to describe the quantum dynamics of this process, the coincidence rates can be calculated and analysed. We predict that by counting coincidences a Bell test can be done under realistic circumstances, and compare this scheme to alternative ones.
Last modified:22 October 2012 2.30 p.m.