Ujjwal Sen

Restoring metrological quantum advantage of measurement precision in noisy scenario

2022 · arXiv (Cornell University)

We show that in presence of a local and uncorrelated dephasing noise, quantum advantage can be obtained in the Fisher information-based lower bound of the minimum uncertainty in estimating parameters of the system Hamiltonian. The …

Exclusion principle for nonlocal advantage of quantum coherence

2023 · arXiv (Cornell University)

Coherences in mutually unbiased bases of states of an isolated quantum system follow a complementarity relation. The nonlocal advantage of quantum coherence (NAQC), defined in a bipartite scenario, is a situation in which the average …

Effects of the detection loophole on rival entanglement attestation techniques

2026 · Physical Review A

Loopholes present in an experimental set-up can significantly affect the reliability of entanglement detection. We discuss two methods for detection of entanglement: one is by using the positive partial transposition criterion after quantum state tomography …