Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-09-22
Physics
High Energy Physics
High Energy Physics - Experiment
presented by E. Milotti to the WSEAS-ISCGAV '05 Conference, Malta, 15-17/9/2005
Scientific paper
Nonlinear interactions of light with light are well known in quantum electronics, and it is quite common to generate harmonic or subharmonic beams from a primary laser with photonic crystals. One suprising result of quantum electrodynamics is that because of the quantum fluctuations of charged fields, the same can happen in vacuum. The virtual charged particle pairs can be polarized by an external field and vacuum can thus become birefringent: the PVLAS experiment was originally meant to explore this strange quantum regime with optical methods. Since its inception PVLAS has found a new, additional goal: in fact vacuum can become a dichroic medium if we assume that it is filled with light neutral particles that couple to two photons, and thus PVLAS can search for exotic particles as well. PVLAS implements a complex signal processing scheme: here we describe the double data acquisition chain and the data analysis methods used to process the experimental data.
Bregant M.
Cantatore Giovanni
Carusotto S.
Cimino R.
Domenico Gianni Di
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