TY - JOUR
T1 - Effective constraints and physical coherent states in quantum cosmology
T2 - A numerical comparison
AU - Bojowald, Martin
AU - Tsobanjan, Artur
PY - 2010
Y1 - 2010
N2 - A cosmological model with a cyclic interpretation is introduced, which is subject to quantum back-reaction and yet can be treated rather completely by physical coherent states as well as effective constraint techniques. By this comparison, the role of quantum back-reaction in quantum cosmology is unambiguously demonstrated. Also the complementary nature of strengths and weaknesses of the two procedures is illustrated. Finally, effective constraint techniques are applied to a more realistic model filled with radiation, a context in which physical coherent states are not available.
AB - A cosmological model with a cyclic interpretation is introduced, which is subject to quantum back-reaction and yet can be treated rather completely by physical coherent states as well as effective constraint techniques. By this comparison, the role of quantum back-reaction in quantum cosmology is unambiguously demonstrated. Also the complementary nature of strengths and weaknesses of the two procedures is illustrated. Finally, effective constraint techniques are applied to a more realistic model filled with radiation, a context in which physical coherent states are not available.
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U2 - 10.1088/0264-9381/27/14/145004
DO - 10.1088/0264-9381/27/14/145004
M3 - Article
AN - SCOPUS:77953110156
SN - 0264-9381
VL - 27
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
IS - 14
M1 - 145004
ER -