Geodesic
The “free” quantum Brownian particle as a non-Fock linear bosonic system
Teoretičeskaâ i matematičeskaâ fizika, Tome 116 (1998) no. 2, pp. 201-214 Cet article a éte moissonné depuis la source Math-Net.Ru

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We quantize the Langevin equation for a “free” Brownian particle. The corresponding linear bosonic system possesses infrared singularities and is therefore non-Fock. We construct the physical representations of fields using the generalized stationary states. 
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A. I. Oksak; A. D. Sukhanov. The “free” quantum Brownian particle as a non-Fock linear bosonic system. Teoretičeskaâ i matematičeskaâ fizika, Tome 116 (1998) no. 2, pp. 201-214. http://geodesic.mathdoc.fr/item/TMF_1998_116_2_a3/

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