Hamburg 2009 – wissenschaftliches Programm
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SYLV: Symposium Lokalisierung und Verschränkung in photoinduzierten Prozessen
SYLV 2: SYLV II
SYLV 2.3: Hauptvortrag
Montag, 2. März 2009, 17:30–18:00, VMP 8 HS
Space-time entanglement: A realization of EPR’s original proposal — •Burkhard Langer1 and Uwe Becker2 — 1Freie Universität Berlin — 2Fritz-Haber-Institut der MPG
In their famous paper Einstein, Podolsky and Rosen[1] questioned 1935 the completeness of quantum mechanics concerning a local realistic description of our reality. They argued on the basis of superpositions of position and momentum states against the inherent non-locality and loss of information on prior conditions by quantum mechanics. This pioneering proposal was, however, too vague to be implemented in any experimental proof. Consequently, angular momentum related variables such as the polarisation of light became the working horse of all experiments proving the EPR predictions on the basis of their quantitatively reformulated version by John Bell 1964. Since that all experiments beginning from the pioneering work by Alain Aspect over the Stirling experiment of Hans Kleinpoppen to the world wide publicity gaining quantum teleportation experiments by Anton Zeilinger used the polarization properties of light as spin equivalent to prove the predictive power of quantum mechanics. However, the spin and its related polarization properties are abstract quantities compared to position and momentum. Here we present the first evidence that non-locality and loss of prior quantum state information occurs also for position in ordinary space. This shows that the tunnelling effect and entanglement are inherently correlated. This will be a subject of future studies on the foundations of quantum physics.
[1] A. Einstein, B. Podolsky and N. Rosen, Phys. Rev. 47, 777, 1935.