van Nieuwkerk, Yuri D. Essler, Fabian H.L.

We consider a model of two tunnel-coupled one-dimensional Bose gases with hard-wall boundary conditions. Bosonizing the model and retaining only the most relevant interactions leads to a decoupled theory consisting of a quantum sine-Gordon model and a free boson, describing respectively the antisymmetric and symmetric combinations of the phase fiel...

Guidry, Mike Sun, Yang Wu, Lian-Ao Wu, Cheng-Li

We review application of the SU(4) model of strongly-correlated electrons to cuprate and iron-based superconductors. A minimal self-consistent generalization of BCS theory to incorporate antiferromagnetism on an equal footing with pairing and strong Coulomb repulsion is found to account systematically for the major features of high-temperature supe...

Rossini, Davide Vicari, Ettore

We study the quantum dynamics of many-body systems, in the presence of dissipation due to the interaction with the environment, under Kibble-Zurek (KZ) protocols in which one Hamiltonian parameter is slowly, and linearly in time, driven across the critical value of a zero-temperature quantum transition. In particular we address whether, and under w...

Hsiao, Wei-Han

We compute the time-reversal odd effective action for the low-energy model of bilayer graphene in the presence of out-of-plane magnetic field. A generating functional for the effective action that captures the electromagnetic response to all orders in momentum and frequency is presented and evaluated to the third order in space-time gradient $\math...

Drukarev, E.G. Mikhailov, A.I. Rakhimov, Kh.Yu. Yusupov, H.T.

We study the photoionization of the $s$ states in the systems bound by sufficiently weak central fields $V(r)$ for the large photon energies corresponding to the relativistic photoelectrons. We demonstrate that the energy dependence of the photoionization cross section can be obtained without solving the wave equation. We show that the shape of the...

Sarkar, Mitradeep Renault, Gilles Gateau, Jérôme

Photoacoustic (PA) contrast agents are usually characterized with spectrophotometry or uncalibrated PA imaging systems, leading to partial assessment of their PA efficacy. To perform calibrated PA spectroscopy with a PA imaging system, we developed a method that both corrects for the spectral energy distribution of excitation light and performs a c...

Costin, Ovidiu Dunne, Gerald V.

Expansions of physical functions are controlled by their singularities, which have special structure because they themselves are physical, corresponding to instantons, caustics or saddle configurations. Resurgent asymptotics formalizes this idea mathematically, and leads to significantly more powerful extrapolation methods to extract physical infor...

Göbel, Börge Akosa, Collins Ashu Tatara, Gen Mertig, Ingrid

Magnetic hopfions are topologically protected three-dimensional solitons that are constituted by a tube which exhibits a topologically nontrivial spin texture in the cross-section profile and is closed to a torus. Here we show that the hopfion's locally uncompensated emergent field leads to a topological Hall signature, although the topological Hal...

Ross, Calum Sakai, Norisuke Nitta, Muneto

We study two-body interactions of magnetic skyrmions on the plane and apply them to a (mostly) analytic description of a skyrmion lattice. This is done in the context of the solvable line, a particular choice of a potential for magnetic anisotropy and Zeeman terms, where analytic expressions for skyrmions are available. Along the solvable line the ...

Rosenhaus, Vladimir

A number of studies have shown that chaos occurs in scattering: the outgoing deflection angle is seen to be an erratic function of the impact parameter. We propose to extend this to quantum field theory, and to use the $S$-matrix as a probe of chaos.