Magnetic monopoles have been realized as emergent quasiparticles in both condensed matter and ultracold atomic platforms, with growing interest the coupling effects between monopole different magnetic quasiparticles. In this work, interaction magnons are investigated for an pseudospin chain. We reveal that can excite a virtual magnon cloud paramagnetic chain, thereby giving rise to unconvention...

Bose polarons, quasiparticles composed of mobile impurities surrounded by cold gas, can experience strong interactions mediated the many-body environment and form bipolaron bound states. Here we present a detailed study heavy polarons in one-dimensional gas formulating nonperturbative theory complementing it with exact numerical simulations. We develop an analytic approach for weak boson-boson ...

Electronic structures of undoped and doped cyclic polythiophene (PT) are studied using modified σ-bond compressibility model. Cyclic PT doped with odd number of bipolarons creates an aromatic polyene backbone containing (4n+2) π-electrons and the system is driven towards the quinoid form. Consequently, we find an insulator-metal transition for dopant concentration ≥ 14 mol % and a ∼ 0.8 eV reds...

We describe the paired electron crystal (PEC) which occurs in the interacting frustrated twodimensional 4filled band. The PEC is a charge-ordered state with nearest-neighbor spin singlets separated by pairs of vacant sites, and can be thought of as a bipolaron density wave. The PEC has been experimentally observed in the insulating state proximate to superconductivity in the organic chargetrans...

A comprehensive picture of polaron and bipolaron physics is essential to understand the optical absorption spectrum in many materials with electron-phonon interactions. In particular, finite-temperature properties are interest since they play an important role experiments. Here, we combine parallel two-site time-dependent variational principle algorithm (p2TDVP) local basis optimization (LBO) p...

We study a weakly-interacting one-dimensional Bose gas with two impurities coupled locally to the boson density. derive analytical results for induced interaction between at arbitrary coupling and separation $r$. At $r\lesssim \xi$, where $\xi$ denotes healing length of gas, is well described by mean-field contribution. Its form changes as increased, approaching linear function $r$ short distan...