Chamon, Claudio Green, Dmitry Yang, Zhi-Cheng

We show how to construct fully quantum multi-spin interactions using only two-body Ising interactions plus a uniform transverse field. We then provide an explicit embedding of simple gauge models, such as the surface code, into the D-Wave chimera architecture. Taken as whole this is a way to build topological qubits using existing hardware. The sch...

Bañuls, Mari Carmen Cichy, Krzysztof Kao, Ying-Jer Lin, C.-J. David Lin, Yu-Ping Tan, David T.-L.

Employing matrix product states as an ansatz, we study the non-thermal phase structure of the (1+1)-dimensional massive Thirring model in the sector of vanishing total fermion number with staggered regularization. In this paper, details of the implementation for this project are described. To depict the phase diagram of the model, we examine the en...

Staffeldt, Wiebke Hartmann, Alexander K.

We have studied the distribution of traffic flow $q$ for the Nagel-Schreckenberg model by computer simulations. We applied a large-deviation approach, which allowed us to obtain the distribution $P(q)$ over more than one hundred decades in probability, down to probabilities like $10^{-140}$. This allowed us to characterize the flow distribution ove...

Quesne, C.

Infinite families of quasi-exactly solvable position-dependent mass Schr\"odinger equations with known ground and first excited states are constructed in a deformed supersymmetric background. The starting points consist in one- and two-parameter trigonometric P\"oschl-Teller potentials endowed with a deformed shape invariance property and, therefor...

Das, Kamal Agarwal, Amit

Berry curvature acts analogous to a magnetic field in the momentum-space, and it modifies the flow of charge carriers and entropy. This induces several intriguing magnetoelectric and magnetothermal transport phenomena in Weyl semimetals. %, including the planar Hall and planar Nernst effect. Here, we explore the impact of the Berry curvature and or...

Han, Xizhi Hartnoll, Sean A.

Operator growth in spatially local quantum many-body systems defines a scrambling velocity. We prove that this scrambling velocity bounds the state dependence of the out-of-time-ordered correlator in local lattice models. We verify this bound in simulations of the thermal mixed-field Ising spin chain. For scrambling operators, the butterfly velocit...

Xu, Yueshan Zhao, Jianzhou Yi, Changjiang Wang, Qi Yin, Qiangwei Wang, Yilin Hu, Xiaolei Wang, Luyang Liu, Enke Xu, Gang
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The interplay between electronic correlations and topological protection may offer a rich avenue for discovering emergent quantum phenomena in condensed matter. However, electronic correlations have so far been little investigated in Weyl semimetals (WSMs) by experiments. Here, we report a combined optical spectroscopy and theoretical calculation s...

Zielinski, Tash Ross, Bernard Gezerlis, Alexandros

In this work we theoretically study pairing in two-dimensional Fermi gases, a system which is experimentally accessible using cold atoms. We start by deriving the mean-field pairing gap equation for a coordinate-space potential with a finite interaction range, and proceed to solve this numerically. We find that for sufficiently short effective rang...

Hertzberg, Mark P. Jain, Mudit

In order to elucidate the role of spontaneous symmetry breaking in condensed matter systems, we explicitly construct the ground state wave function for a nonrelativistic theory of a two-fluid system of bosons. This can model either superconductivity or superfluidity, depending on whether we assign a charge to the particles or not. Since each nonrel...

Kiefer, Claus

I address the question whether the wave function in quantum theory exists as a real (ontic) quantity or not. For this purpose, I discuss the essentials of the quantum formalism and emphasize the central role of the superposition principle. I then explain the measurement problem and discuss the process of decoherence. Finally, I address the special ...