Sun, Feng-Xiao He, Qiongyi Gong, Qihuang Teh, Run Yan Reid, Margaret D. Drummond, Peter D.

We discuss general properties of discrete time quantum symmetry breaking in degenerate parametric oscillators. Recent experiments in superconducting quantum circuit with Josephson junction nonlinearities give rise to new properties of strong parametric coupling and nonlinearities. Exact analytic solutions are obtained for the steady-state of this s...

Lapierre, Bastien Choo, Kenny Tauber, Clément Tiwari, Apoorv Neupert, Titus Chitra, Ramasubramanian

While driven interacting quantum matter is generically subject to heating and scrambling, certain classes of systems evade this paradigm. We study such an exceptional class in periodically driven critical (1 + 1)-dimensional systems with a spatially modulated, but disorder-free time evolution operator. Instead of complete scrambling, the excitation...

Schlippert, D. Meiners, C. Rengelink, R.J. Schubert, C. Tell, D. Zipfel, K.H. Ertmer, W. Rasel, E.M.

Very Long Baseline Atom Interferometry (VLBAI) corresponds to ground-based atomic matter-wave interferometry on large scales in space and time, letting the atomic wave functions interfere after free evolution times of several seconds or wave packet separation at the scale of meters. As inertial sensors, e.g., accelerometers, these devices take adva...

Millington, Peter Saffin, Paul M.

We present an explicit treatment of the two-particle-irreducible (2PI) effective action for a zero-dimensional quantum field theory. The advantage of this simple playground is that we are required to deal only with functions rather than functionals, making complete analytic approximations accessible and full numerical evaluation of the exact result...

Cremonini, Sera Li, Li Ren, Jie
Published in
Journal of High Energy Physics

We investigate holographic fermions in uni-directional striped phases, where the breaking of translational invariance can be generated either spontaneously or explicitly. We solve the Dirac equation for a probe fermion in the associated background geometry. When the spatial modulation effect becomes sufficiently strong, we see a spectral weight sup...

Witten, Edward Yonekura, Kazuya

Perturbative fermion anomalies in spacetime dimension $d$ have a well-known relation to Chern-Simons functions in dimension $D=d+1$. This relationship is manifested in a beautiful way in "anomaly inflow" from the bulk of a system to its boundary. Along with perturbative anomalies, fermions also have global or nonperturbative anomalies, which can be...

Choun, Yoon-Seok

Energy spectrum of the Schr\"odinger equation for the interaction $c r^2 + b r -\frac{a}{r}$ is obtained in the form of three different cases such as (i) a quantized $c$, (ii) a quantized $b$ and (iii) a quantized $a$ in the non-linear regime. Energy spectrum of the first is concave-up, and energy spectrum of the second is concave-down with given $...

Zhang, Q. R. Zeng, B. Chiu, Y. C. Schoenemann, R. Memaran, S. Zheng, W. Rhodes, D. Chen, K. -W. Besara, T. Sankar, R.
...

We evaluate the topological character of TaAs through a detailed study of the angular, magnetic-field and temperature dependence of its magnetoresistivity and Hall-effect(s), and of its bulk electronic structure through quantum oscillatory phenomena. At low temperatures, and for fields perpendicular to the electrical current, we extract an extremel...

Allys, E. Levrier, F. Zhang, S. Colling, C. Blancard, B. Regaldo-Saint Boulanger, F. Hennebelle, P. Mallat, S.

The interstellar medium (ISM) is a complex non-linear system governed by gravity and magneto-hydrodynamics, as well as radiative, thermodynamical, and chemical processes. Our understanding of it mostly progresses through observations and numerical simulations, and a quantitative comparison between these two approaches requires a generic and compreh...

Song, Xue-Yang He, Yin-Chen Vishwanath, Ashvin Wang, Chong

We develop a nonperturbative approach to the bulk polarization of crystalline electric insulators in $d\geq1$ dimensions. Formally, we define polarization via the response to background fluxes of both charge and lattice translation symmetries. In this approach, the bulk polarization is related to properties of magnetic monopoles under translation s...