4 citations · 4 across the 8 of their papers we have counts for
8 papers
A Bogoliubov-ratio framework for quantum-information diagnostics of time-dependent two-mode Boson System
Shi-Cheng Liu, Lei-Hua Liu, Bichu Li +2
We formulate a compact dynamical representation of quantum-information diagnostics for time-dependent two-mode bosonic systems in terms of the Bogoliubov ratio $λ_k(η)=β_k(η)/α_k(η…
Quantum-information diagnostics of cosmological perturbations with nontrivial sound speed in inflation
Shi-Cheng Liu, Lei-Hua Liu, Bichu Li +2
In this work, we systematically investigate the quantum-information diagnostics of cosmological perturbations with a nontrivial sound speed, utilizing a normalized open two-mode sq…
Non-minimally Coupled Running Curvaton for DESI-motivated Dynamical Dark Energy
Bichu Li, Lei-Hua Liu
Recent DESI BAO data combined with CMB and supernova measurements suggest a dynamical dark energy that can cross the phantom divide. We show that introducing a non-minimal coupling…
A quantum information method for early universe with non-trivial sound speed
Shi-Cheng Liu, Lei-Hua Liu, Bichu Li +2
Many quantum gravitational frameworks, such as DBI inflation, k-essence, and effective field theories obtained by integrating out heavy modes, can lead to a non-trivial sound speed…
Microlensing of dark matter models in the Milky Way
Bichu Li, Chan-Yu Tang, Zhuo-Ran Huang +1
We investigate constraints on the abundance of primordial black holes (PBHs) as dark matter (DM) candidates using five years of microlensing data from the OGLE survey. While the ma…
Lowering the strong coupling mode of modified teleparallel gravity theories
Yu-Min Hu, Bi-Chu Li, Yang Yu +3
We investigate the strong coupling problem in modified teleparallel gravity theories using the effective field theory (EFT) approach, demonstrating that it is possible to shift the…
The backreaction effect of the sound speed resonance in DBI inflation
Bichu Li, Chao Chen, Bo Wang
We examine the backreaction effect of the enhanced small-scale scalar perturbations from the sound speed resonance (SSR) mechanism for primordial black hole formation in Dirac-Born…
The nonlinear equation of correlation function of galaxies in the expanding universe and the solution in linear approximation
Yang Zhang, Bichu Li
We present an analytic study of the density fluctuation of a Newtonian self-gravity fluid in the expanding universe with , which extends our previous work in the static…