Quantum optimal control, a toolbox for devising and implementing the shapes of external
fields that accomplish given tasks in the operation of a quantum device in the best way …

Shortcuts to adiabaticity (STA) are fast routes to the final results of slow, adiabatic changes
of the controlling parameters of a system. The shortcuts are designed by a set of analytical …

A quantum generalization of Natural Gradient Descent is presented as part of a general-
purpose optimization framework for variational quantum circuits. The optimization dynamics …

In an isolated system, the time evolution of a given observable in the Heisenberg picture can
be efficiently represented in Krylov space. In this representation, an initial operator becomes …

We present a major update to QuSpin, SciPostPhys. 2.1. 003--an open-source Python
package for exact diagonalization and quantum dynamics of arbitrary boson, fermion and …

The presence of noise or the interaction with an environment can radically change the
dynamics of observables of an otherwise isolated quantum system. We derive a bound on …

Counterdiabatic (CD) driving presents a way of generating adiabatic dynamics at an
arbitrary pace, where excitations due to nonadiabaticity are exactly compensated by adding …

The quantum alternating operator ansatz (QAOA) is a prominent example of variational
quantum algorithms. We propose a generalized QAOA called CD-QAOA, which is inspired …

Any physical system evolves at a finite speed that is constrained not only by the energetic
cost but also by the topological structure of the underlying dynamics. In this Letter, by …

Quantum speed limits set the maximal pace of state evolution. Two well-known limits exist
for a unitary time-independent Hamiltonian: the Mandelstam-Tamm and Margolus-Levitin …