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6 papers · 2 filters
Quantum Damping of Cosmological Shear: A New Prediction from Loop Quantum Cosmologies
Wen-Cong Gan, Leila L. Graef, Rudnei O. Ramos +2
We study the dynamics of the Bianchi I universe in modified loop quantum cosmology (mLQC-I) and uncover a robust mechanism for isotropization: the shear is dynamically suppressed a…
Effects of the ekpyrotic mechanism on inflationary phase in loop quantum cosmologies
Christian Brown, Jared Fier, Brian Phillips +2
In bouncing cosmological models, either classical or quantum, the big bang singularity is replaced by a regular bounce. A challenging question in such models is how to keep the she…
Probing modified gravitational-wave dispersion with bursts from eccentric black-hole binaries
Nicholas Loutrel, Ava Bailey, Davide Gerosa
Gravitational waves in general relativity are non-dispersive, yet a host of modified theories predict dispersion effects during propagation. In this work, we consider the impact of…
Stable initial conditions and analytical investigations of cosmological perturbations in a modified loop quantum cosmology
Rui Pan, Jamal Saeed, Anzhong Wang
In this paper, we study cosmological perturbations in a modified theory of loop quantum cosmologies, the so-called mLQC-I model. Our purposes are two-fold: First, using a method de…
Lessons from gauge fixing and polymerization of loop quantum black holes with a cosmological constant
Geeth Ongole, Parampreet Singh, Anzhong Wang
Loop quantization of Schwarzschild black holes with a cosmological constant for polymerization parameters which are constant is studied in the effective spacetime description. We s…
Fundamental Physics and Cosmology with TianQin
Jun Luo, Haipeng An, Ligong Bian +33
The exploration of the surrounding world and the universe is an important theme in the legacy of humankind. The detection of gravitational waves is adding a new dimension to this g…