INSTITUTE OF APPLIED PHYSICS - Relativistic particles with random mass investigated on an optical chip
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Relativistic particles with random mass investigated on an optical chip


The Dirac equation, which governs the quantum mechanics of relativistic fermions, describes various fascinating phenomena arising from the combination of quantum mechanics and relativity. Unfortunately, in most cases the predictions of this celebrated equation cannot be tested experimentally, since commonly extremely high energies are involved in the phenomena associated with it.

In their work, a team of scientists around Robert Keil and Prof. Alexander Szameit of the Institute of Applied Physics were able to realize a photonic structure in a glass chip, in which the light evolution is described by an optical version of the Dirac equation. This allows the probing of relativistic effects using a classical optical setting with low-energy light beams. The IAP scientists particularly focused on an analogy of their optical setting to a range of magnetic solids, in which certain defects that are distributed along the crystalline lattice exhibit long-range correlations, i.e., their mutual influence does not decay exponentially with distance as in most other solids. These correlations are responsible for various unusual properties of these magnetic materials. The goal of the current research, that was published in Nature Communications (DOI: 10.1038/ncomms2384), was to transfer this concept to optics in order to develop a new platform for "relativistic" optical devices which provides a table-top model system for the Dirac equation and can potentially find use in information processing and transfer.

Original publication:

R. Keil, J. M. Zeuner, F. Dreisow, M. Heinrich, A. T√ľnnermann, S. Nolte, A. Szameit, "The random mass Dirac model and long-range correlations on an integrated optical platform," Nature Communications 4, 1368 (2013). doi:10.1038/ncomms2384

News from: 25.01.2013 18:17
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