The persistent separability of certain quantum states, known as symmetric absolutely
separable (SAS), under symmetry-preserving global unitary transformations is of key …

We study the upper projected bounds on the dark matter fraction in the form of the primordial
black holes (PBHs) with a non-zero spin by using the absorption feature in the global 21-cm …

Negative quantum conditional entropy states are key ingredients for information theoretic
tasks such as superdense coding, state merging and one-way entanglement distillation. In …

We develop a resource theory for non-absolutely-separable states (non-AS) in which
absolutely separable states (AS) that cannot be entangled by any global unitaries are …

Fully entangled fraction (FEF) is a significant figure of merit for density matrices. In bipartite
d⊗ d quantum systems, the threshold value FEF> 1/d, carries significant implications for …

The absolutely separable (resp. PPT) states remain separable (resp. positive partial
transpose) under any global unitary operation. We present a compact form of the extreme …

We study the maximum entanglement that can be produced by a global unitary
transformation for systems of two and three qubits constrained to the fully symmetric states …

Sufficient analytical conditions for separability in composite quantum systems are very
scarce and only known for low-dimensional cases. Here, we use linear maps and their …

Separability from the spectrum is a significant and ongoing research topic in quantum
entanglement. In this study, we investigate properties related to absolute separability from …

Quantum systems are vulnerable against environmental interactions which may result in
depletion of potential resources. The decay in the resources may be to the extent that they …