Many-body entanglement is often created through the system evolution, aided by nonlinear
interactions between the constituting particles. These very dynamics, however, can also lead …

Dynamical quantum phase transitions are closely related to equilibrium quantum phase
transitions for ground states. Here, we report an experimental observation of a dynamical …

We report on the observation of half-quantum vortices (HQVs) in the easy-plane polar phase
of an antiferromagnetic spinor Bose-Einstein condensate. Using in situ magnetization …

Quantum phase transitions universally exist in the ground and excited states of quantum
many-body systems, and they have a close relationship with the nonequilibrium dynamical …

Quantum entanglement can provide enhanced measurement precision beyond the standard
quantum limit, the highest precision achievable with classical means. However …

A dynamical quantum phase transition can be characterized by a nonanalytic change in the
quench dynamics when a parameter in the governing Hamiltonian is varied. Such a …

Spontaneous symmetry breaking occurs in a physical system whenever the ground state
does not share the symmetry of the underlying theory, eg, the Hamiltonian. This mechanism …

We theoretically investigate estimation of the control parameter in a ferromagnetic Bose-
Einstein condensate near second-order quantum phase transitions. We quantify sensitivity …

We present an experimental study on nonequilibrium dynamics of a spinor condensate after
it is quenched across a superfluid to Mott insulator (MI) phase transition in cubic lattices …

Identifying dynamical signatures of excited-state quantum phase transitions (ESQPTs) in
experimentally realizable quantum many-body systems is helpful for understanding the …