TY - GEN
T1 - Entanglement in inflationary universe
AU - Ohsumi, Yuji
AU - Nambu, Yasusada
PY - 2012
Y1 - 2012
N2 - The large scale structure in the present universe arose from the quantum uctuation of an inaton field in inationary era. In the theory of structure formation, the initial perturbation is described by a classical distribution function. If the perturbation has a purely quantum correlation, or entanglement, they cannot be described by classical distribution function. Therefore, the entanglement in perturbation must disappear. We have investigated the condition that the entanglement between a field in two regions on space disappears. We found that in the limit of large e-folding number, the entanglement depends on the distance between the two regions, but does not depend on time. The distance at which the entanglement disappears depends on the model of background spacetime and the mass of the field.
AB - The large scale structure in the present universe arose from the quantum uctuation of an inaton field in inationary era. In the theory of structure formation, the initial perturbation is described by a classical distribution function. If the perturbation has a purely quantum correlation, or entanglement, they cannot be described by classical distribution function. Therefore, the entanglement in perturbation must disappear. We have investigated the condition that the entanglement between a field in two regions on space disappears. We found that in the limit of large e-folding number, the entanglement depends on the distance between the two regions, but does not depend on time. The distance at which the entanglement disappears depends on the model of background spacetime and the mass of the field.
UR - http://www.scopus.com/inward/record.url?scp=84885581340&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84885581340&partnerID=8YFLogxK
U2 - 10.1142/9789814374552_0246
DO - 10.1142/9789814374552_0246
M3 - Conference contribution
AN - SCOPUS:84885581340
SN - 9814374512
SN - 9789814374514
T3 - 12th Marcel Grossmann Meeting on Recent Dev. in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proc. of the MG 2009 Meeting on General Relativity
SP - 1459
EP - 1461
BT - 12th Marcel Grossmann Meeting on Recent Dev. in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proc. of the MG 2009 Meeting on General Relativity
PB - World Scientific Publishing Co. Pte Ltd
T2 - 12th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, MG 2009
Y2 - 12 July 2009 through 18 July 2009
ER -