We introduce novel higher-order topological phases of matter in chiral-symmetric systems
(class AIII of the tenfold classification), most of which would be misidentified as trivial by …

Transmon qubits are ubiquitously used in superconducting quantum information processor
architectures. Strong drives are required to realize fast, high-fidelity, gates and …

The properties of mixed eigenstates in a generic quantum system with a classical
counterpart that has mixed-type phase space, although important to understand several …

The boundary of the lemon billiards is defined by the intersection of two circles of equal unit
radius with the distance 2 B between their centers, as introduced by Heller and Tomsovic [EJ …

Recent progress towards understanding the mechanism of dynamical tunneling in
Hamiltonian systems with three or more degrees of freedom (DoF) is reviewed. In contrast to …

Dynamics of a particle in a resonantly driven quantum well can be interpreted as that of a
particle in a crystal-like structure, with the time playing the role of the coordinate. By …

Experiments with ultracold atoms in optical lattices usually involve a weak parabolic trapping
potential which merely serves to confine the atoms, but otherwise remains negligible. In …

We study the interplay of chaos and tunneling between two weakly coupled Bose-
Josephson junctions. The classical phase space of the composite system has a mixed …

Quantum tunneling refers to a phenomenon that a microscopic object can pass through a
potential barrier even it does not have enough energy to overcome the barrier. It has led to …

The field of quantum simulation aims at emulating complex quantum systems on platforms
that are easier to control and observe. In the last twenty years, ultracold atoms in optical …