A L Matacz 1993 Class. Quantum Grav. 10 509 doi:10.1088/0264-9381/10/3/011
A L Matacz
Show affiliationsThe author investigates the evolution of a massless, conformally coupled scalar field interacting with an environment in a spatially flat FRW metric. The environment is taken to be a second massless, conformally coupled scalar field. By finding the ground state wavefunctional of the coupled system and integrating out the unobservable scalar field the author obtains a reduced density matrix for the system, and then uses the reduced density matrix to show that classical behaviour emerges for wavelengths greater than the Hubble radius. This occurs despite the absence of particle creation.
Issue 3 (March 1993)
A L Matacz 1993 Class. Quantum Grav. 10 509
Jian Xu 2008 Nonlinearity 21 2113
Chia Ying Lee et al 2006 Nanotechnology 17 83
Yasutomo Nomura et al 1997 Phys. Med. Biol. 42 1009
F Cannata and M Ioffe 2001 J. Phys. A: Math. Gen. 34 1129
Géza I Márk 1997 Eur. J. Phys. 18 247
Peter Ambrosi 2009 Metrologia 46 S99
Gang Bao 1998 Inverse Problems 14 787
H Takagi et al 2009 J. Phys.: Conf. Ser. 192 012003
Yao Xuebiao et al 1996 J. Phys. D: Appl. Phys. 29 506