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10 papers · 2 filters
Timeless path integral for relativistic quantum mechanics
Dah-Wei Chiou
Starting from the canonical formalism of relativistic (timeless) quantum mechanics, the formulation of timeless path integral is rigorously derived. The transition amplitude is ref…
Observational upper limits on the gravitational wave production of core collapse supernovae
Xing-Jiang Zhu, Eric Howell, David Blair
The upper limit on the energy density of a stochastic gravitational wave (GW) background obtained from the two-year science run (S5) of the Laser Interferometer Gravitational-wave…
Unimodular Loop Quantum Cosmology
Dah-Wei Chiou, Marc Geiller
Unimodular gravity is based on a modification of the usual Einstein-Hilbert action that allows one to recover general relativity with a dynamical cosmological constant. It also has…
Dynamical behavior of interacting dark energy in loop quantum cosmology
Kui Xiao, Jian-Yang Zhu
The dynamical behaviors of interacting dark energy in loop quantum cosmology are discussed in this paper. Based on defining three dimensionless variables, we simplify the equations…
New length operator for loop quantum gravity
Yongge Ma, Chopin Soo, Jinsong Yang
An alternative expression for the length operator in loop quantum gravity is presented. The operator is background independent, symmetric, positive semidefinite, and well defined o…
Cosmological inflation driven by holonomy corrections of loop quantum cosmology
Dah-Wei Chiou, Kai Liu
At the level of heuristic effective dynamics, we investigate the cosmological inflation with holonomy corrections of loop quantum cosmology (LQC) in the Friedmann-Robertson-W…