Exceptional points (EPs) arising in non-Hermitian systems have led to a variety of intriguing
wave phenomena, and have been attracting increased interest in various physical platforms …

The notion of non-Hermitian optics and photonics rooted in quantum mechanics and
photonic systems has recently attracted considerable attention ushering in tremendous …

All-optical switches are among the most important parts of integrated photonics. Ultrahigh
speed and ultralow energy consumption are two necessary indexes of all-optical switches …

The large volumes induced by complex free‐space optical paths pose a challenge to
quantum precision measurement and optical communication in traditional optics …

Motivated by the recent growing interest in the field of PT-symmetric Hamiltonian systems we
theoretically study the emergence of singularities called exceptional points (EPs) in the …

Exceptional points of order n (EP ns) appear in non-Hermitian systems as points where the
eigenvalues and eigenvectors coalesce. They emerge if 2 (n− 1) real constraints are …

The sensitivity of perturbation sensing can be effectively enhanced with higher-order
exceptional points due to the nonlinear response to frequency splitting. However …

We present a theoretical study of quantum phases and quantum phase transitions occurring
in non-Hermitian P T-symmetric superconducting qubits chains described by a transverse …

Nowadays, topological parity-time (PT) and anti-parity-time (APT) symmetry systems have
attracted substantial attention due to their noticeable features and specific applications. The …

Exceptional points (EPs) are a special kind of singularity that appear as topological defects
in parameter-dependent open systems. Here we propose the concept of conjugate EPs …