Mandal, Aditi Dhankhar, Nikita Sébilleau, Didier Choubisa, Rakesh

In this communication, we report our calculations of Triple Differential Cross-Section (TDCS) for relativistic (e,2e) with twisted electron beam on heavy atomic targets, namely Cu, Au and Ag, in coplanar asymmetric geometry mode. The formalism has been developed in the first Born approximation using the Dirac plane wave as well as the twisted elect...

Raicher, E. Lv, Q.Z. Keitel, C.H. Hatsagortsyan, K.Z.

It is commonly assumed that in ultrastrong laser fields, when the strong field parameter of the laser field $\xi$ is larger than one, the electron radiation is well described by the local constant field approximation (LCFA). We discuss the failure of this conjecture, considering radiation of an ultrarelativistic electron interacting with strong cou...

Fortuna, Sean Vega, Ian

Spectral methods are now common in the solution of ordinary differential eigenvalue problems in a wide variety of fields, such as in the computation of black hole quasinormal modes. Most of these spectral codes are based on standard Chebyshev, Fourier, or some other orthogonal basis functions. In this work we highlight the usefulness of a relativel...

Kofroň, David

The Teukolsky master equation—a fundamental equation for test fields of any spin, or perturbations, in type D spacetimes—is classically treated in its separated form. Then the solutions representing even the simplest sources—point particles—are expressed in terms of series. The only known exception is a static particle (charge or mass) in the vicin...

Mukherjee, Anirban Lal, Siddhartha

We introduce a novel momentum space entanglement renormalization group (MERG) scheme for the topologically ordered (T.O.) ground state of the 2D Hubbard model on a square lattice (arxiv:1802.06528) using a unitary quantum circuit comprised of non-local unitary gates. At each MERG step, the unitary quantum circuit disentangles a set of electronic st...

Zoubi, Hashem

We study many-particle phenomena of propagating multi-mode photons and phonons interacting through Brillouin scattering-type Hamiltonian in nanoscale waveguides. We derive photon and phonon retarded Green's functions and extract their spectral functions in applying the factorization approximation of the mean-field theory. The real part of the self-...

Basu-Mallick, B. Finkel, F. González-López, A.

We introduce a new class of open, translationally invariant spin chains with long-range interactions depending on both spin permutation and polarized spin reversal operators, which includes the Haldane-Shastry chain as a degenerate case. The new class is characterized by the fact that the Hamiltonian is invariant under "twisted" translations, combi...

Takikawa, Daichi Fujimoto, Satoshi

We investigate how the Kitaev spin liquid state described by Majorana fermions coupled with $Z_2$ gauge fields is affected by non-Kitaev interactions which exist in real candidate materials of the Kitaev magnet. It is found that the off-diagonal exchange interaction referred to as the $\Gamma'$ term dramatically changes the Majorana band structure ...

Öhberg, Patrik Wright, Ewan M.

In a recent comment [1] on our paper [2] Syrwid, Kosior, and Sacha (SKS) asserted that we did not correctly calculate the chiral soliton energy ${\cal E}_{LAB}$ in the lab frame, and further that the system we proposed is not capable of supporting a genuine quantum time crystal. We concede that we did not correctly calculate ${\cal E}_{LAB}$ but we...

Detmold, William Kanwar, Gurtej Wagman, Michael L. Warrington, Neill C.

Monte Carlo studies of many quantum systems face exponentially severe signal-to-noise problems. We show that noise arising from complex phase fluctuations of observables can be reduced without introducing bias using path integral contour deformation techniques. A numerical study of contour deformations for correlation functions in Abelian gauge the...