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quant-ph2025
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…
quant-ph2024
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 $|Ï_{ABC}…
quant-ph2024
Detecting positive quantum capacities of quantum channels
Satvik Singh, Nilanjana Datta
Determining whether a noisy quantum channel can be used to reliably transmit quantum information at a non-zero rate is a challenging problem in quantum information theory. This is…