Physics – Quantum Physics
Scientific paper
2004-06-15
Phys.Rev.Lett. 94 (2005) 030401
Physics
Quantum Physics
4 pages, RevTeX. Substantial changes made
Scientific paper
10.1103/PhysRevLett.94.030401
We analyze the recently proposed mirror superposition experiment of Marshall, Simon, Penrose, and Bouwmeester, assuming that the mirror's dynamics contains a non-unitary term of the Lindblad type proportional to -[q,[q,\rho]], with q the position operator for the center of mass of the mirror, and \rho the statistical operator. We derive an exact formula for the fringe visibility for this system. We discuss the consequences of our result for tests of environmental decoherence and of collapse models. In particular, we find that with the conventional parameters for the CSL model of state vector collapse, maintenance of coherence is expected to within an accuracy of at least 1 part in 10^{8}. Increasing the apparatus coupling to environmental decoherence may lead to observable modifications of the fringe visibility, with time dependence given by our exact result.
Adler Stephen L.
Bassi Angelo
Ippoliti Emiliano
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