It is generally assumed that a Hamiltonian for a physically acceptable quantum system (one
that has a positive-definite spectrum and obeys the requirement of unitarity) must be …

A quantum thermal machine is an open quantum system coupled to hot and cold thermal
baths. Thus, its dynamics can be well understood using the concepts and tools from non …

An ancient and counterintuitive phenomenon known as the Mpemba effect (water can cool
faster when initially heated up) showcases the critical role of initial conditions in relaxation …

Quantum heat engines are expected to outperform the classical counterparts due to
quantum coherences involved. Here we experimentally execute a single-ion quantum heat …

Open quantum systems interacting with an environment exhibit dynamics described by the
combination of dissipation and coherent Hamiltonian evolution. Taken together, these …

We study the quantum evolution of a non-Hermitian qubit realized as a submanifold of a
dissipative superconducting transmon circuit. Real-time tuning of the system parameters to …

Nontrivial spectral properties of non-Hermitian systems can lead to intriguing effects with no
counterparts in Hermitian systems. For instance, in a two-mode photonic system, by …

Exceptional points are the branch-point singularities of non-Hermitian Hamiltonians and
have rich consequences in open-system dynamics. While the exceptional points and their …

Chiral state transfer along closed loops in the vicinity of an exceptional point is one of the
many counterintuitive observations in non-Hermitian physics. The application of this property …

We present a straightforward approach for achieving periodic photon-magnon blockade in a
hybrid optomagnonics system, wherein a single optomagnonic resonator is connected to …