Here we present a many-body theory based on a solution of the N-representability problem
in which the ground-state two-particle reduced density matrix (2-RDM) is determined directly …

Exciton condensation, the Bose–Einstein-like condensation of quasibosonic particle-hole
pairs, has been the subject of much theoretical and experimental interest and holds promise …

Bose-Einstein condensation of excitons, in which excitons condense into a single coherent
quantum state, known as an exciton condensate, enables frictionless energy transfer, but …

Recent experiments have realized exciton condensation in bilayer materials such as
graphene double layers and the van der Waals heterostructure MoSe2–WSe2 with the …

An outstanding challenge in synthesis and theory is to develop molecular materials at
ambient conditions that exhibit highly efficient energy transfer. Here we demonstrate the …

The Bose-Einstein condensation of excitons into a single quantum state is known as exciton
condensation. Exciton condensation, which potentially supports the frictionless flow of …

Quantum states of a novel Bose-Einstein condensate, in which both fermion-pair and exciton
condensations are simultaneously present, have recently been realized theoretically in a …

Long-lived indirect excitons (IXs) exhibit a rich phase diagram, including a Bose–Einstein
condensate (BEC), a Wigner crystal, and other exotic phases. Recent experiments have …

Elucidation of many chemical behaviors and properties depends on our ability to model the
physics of electron-electron interactions at reasonable computational expense with …