Coarse graining and decoherence in quantum field theory TeX Export

@article{citeulike:3859262, abstract = {We consider a \$\lambda \phi^4\$ theory in Minkowski spacetime. We compute a "coarse grained effective action" by integrating out the field modes with wavelength shorter than a critical value. From this effective action we obtain the evolution equation for the reduced density matrix (master equation). We compute the diffusion coefficients of this equation and analyze the decoherence induced on the long- wavelength modes. We generalize the results to the case of a conformally coupled scalar field in DeSitter spacetime. We show that the decoherence is effective as long as the critical wavelength is taken to be not shorter than the Hubble radius.}, archivePrefix = {arXiv}, author = {Lombardo, Fernando and Mazzitelli, Francisco}, citeulike-article-id = {3859262}, citeulike-linkout-0 = {http://arxiv.org/abs/hep-th/9508052}, citeulike-linkout-1 = {http://arxiv.org/pdf/hep-th/9508052}, day = {11}, eprint = {hep-th/9508052}, keywords = {qft, quantum-decoherence}, month = {Aug}, posted-at = {2009-06-26 10:42:37}, priority = {2}, title = {Coarse graining and decoherence in quantum field theory}, url = {http://arxiv.org/abs/hep-th/9508052}, year = {1995} }

TY - JOUR ID - citeulike:3859262 L3 - citeulike-article-id:3859262 N2 - We consider a $\lambda \phi^4$ theory in Minkowski spacetime. We compute a "coarse grained effective action" by integrating out the field modes with wavelength shorter than a critical value. From this effective action we obtain the evolution equation for the reduced density matrix (master equation). We compute the diffusion coefficients of this equation and analyze the decoherence induced on the long- wavelength modes. We generalize the results to the case of a conformally coupled scalar field in DeSitter spacetime. We show that the decoherence is effective as long as the critical wavelength is taken to be not shorter than the Hubble radius. TI - Coarse graining and decoherence in quantum field theory KW - qft KW - quantum-decoherence AU - Lombardo, Fernando AU - Mazzitelli, Francisco PY - 1995/Aug/11/ UR - http://arxiv.org/abs/hep-th/9508052 ER -