2 papers
cond-mat.mes-hall2024
Emergent Symmetry and Valley Chern Insulator in Twisted Double-Bilayer Graphene
Yimeng Wang, G. William Burg, Biao Lian +4
Theoretical calculations show that twisted double bilayer graphene (TDBG) under a transverse electric field develops a valley Chern number 2 at charge neutrality. Using thermodynam…
cond-mat.stat-mech2024
Entanglement Entropy of Free Fermions in Timelike Slices
Bowei Liu, Hao Chen, Biao Lian
We define the entanglement entropy of free fermion quantum states in an arbitrary spacetime slice of a discrete set of points, and particularly investigate timelike (causal) slices…