26 citations · 104 across the 13 of their papers we have counts for
13 papers
Entanglement in cyclic sign invariant quantum states
Aabhas Gulati, Ion Nechita, Satvik Singh
We introduce and study bipartite quantum states that are invariant under the local action of the cyclic sign group. Due to symmetry, these states are sparse and can be parameterize…
Simultaneous superadditivity of the direct and complementary channel capacities
Satvik Singh, Sergii Strelchuk
Quantum communication channels differ from their classical counterparts because their capacities can be superadditive. The principle of monogamy of entanglement suggests that super…
Fully undistillable quantum states are separable
Satvik Singh, Nilanjana Datta
Assume that Alice, Bob, and Charlie share a tripartite pure state . We prove that if Alice cannot distill entanglement with either Bob or Charlie using $|ψ_{ABC}\r…
Ergodic theory of diagonal orthogonal covariant quantum channels
Satvik Singh, Nilanjana Datta, Ion Nechita
We analyze the ergodic properties of quantum channels that are covariant with respect to diagonal orthogonal transformations. We prove that the ergodic behaviour of a channel in th…
Bi-PPT channels are entanglement breaking
Alexander Müller-Hermes, Satvik Singh
In a recent paper, Hirche and Leditzky introduced the notion of bi-PPT channels which are quantum channels that stay completely positive under composition with a transposition and…
Diagonal unitary and orthogonal symmetries in quantum theory II: Evolution operators
Satvik Singh, Ion Nechita
We study bipartite unitary operators which stay invariant under the local actions of diagonal unitary and orthogonal groups. We investigate structural properties of these operators…