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Solvability requires one to drop some of the ingredients of a loop quantized Hamiltonian which, however, are not relevant for states of a universe with large matter content. The solvable model is thus not exactly the same as a loop quantization or that used in the numerical studies of but still allows one to analyze the bounce. Note that also in the dynamical equation was adapted for the numerical purposes and differs from what one would obtain in a loop quantization. None of these changes matter for properties of the bounce of a large universe.
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Solvability requires one to drop some of the ingredients of a loop quantized Hamiltonian which, however, are not relevant for states of a universe with large matter content. The solvable model is thus not exactly the same as a loop quantization or that used in the numerical studies of but still allows one to analyze the bounce. Note that also in the dynamical equation was adapted for the numerical purposes and differs from what one would obtain in a loop quantization. None of these changes matter for properties of the bounce of a large universe.
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M. Bojowald, H. Hernández, M. Kagan, and A. Skirzewski, Phys. Rev. D 75, 064022 (2007). PRVDAQ 0556-2821 10.1103/PhysRevD.75.064022
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As written, this refers to exponentials depending only on connection components while recent investigations of loop quantum cosmology have suggested the use of triad dependent holonomies, i.e. α(p) in eiαc, in Hamiltonian constraint operators. While basic holonomies in the holonomy-flux algebra do not depend on triad components, the appearance of triad dependent holonomies can be motivated by lattice refinements of an inhomogeneous state occurring in a physical state. Our following discussion of the qualitative behavior does not depend much on which form of holonomies is used in the constraint since alternative cases can be mapped into each other by canonical transformations of (p,J) before quantization.
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As written, this refers to exponentials depending only on connection components while recent investigations of loop quantum cosmology have suggested the use of triad dependent holonomies, i.e. α(p) in eiαc, in Hamiltonian constraint operators. While basic holonomies in the holonomy-flux algebra do not depend on triad components, the appearance of triad dependent holonomies can be motivated by lattice refinements of an inhomogeneous state occurring in a physical state. Our following discussion of the qualitative behavior does not depend much on which form of holonomies is used in the constraint since alternative cases can be mapped into each other by canonical transformations of (p,J) before quantization.
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M. Bojowald, D. Cartin, and G. Khanna, Phys. Rev. D 76, 064018 (2007). PRVDAQ 0556-2821 10.1103/PhysRevD.76.064018
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Phys. Rev. D
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Bojowald, M.1
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