468 citations · 1.7k across the 32 of their papers we have counts for
32 papers
Quantum sensing of phase-covariant optical channels
Ranjith Nair, Mile Gu
We obtain universal (i.e., probe and measurement-independent) performance bounds on ancilla-assisted quantum sensing of multiple parameters of phase-covariant optical channels unde…
Quantum-optimal information encoding using noisy passive linear optics
Andrew Tanggara, Ranjith Nair, Syed Assad +5
The amount of information that a noisy channel can transmit has been one of the primary subjects of interest in information theory. In this work we consider a practically-motivated…
Optimal gain sensing of quantum-limited phase-insensitive amplifiers
Ranjith Nair, Guo Yao Tham, Mile Gu
Phase-insensitive optical amplifiers uniformly amplify each quadrature of an input field and are of both fundamental and technological importance. We find the quantum limit on the…
Optimal circular dichroism sensing with quantum light: Multi-parameter estimation approach
Christina Ioannou, Ranjith Nair, Ivan Fernandez-Corbaton +3
The measurement of circular dichroism (CD) has widely been exploited to distinguish the different enantiomers of chiral structures. It has been applied to natural materials (e.g. m…
Fundamental limits of quantum illumination
Ranjith Nair, Mile Gu
In Quantum Illumination (QI), a signal beam initially entangled with an idler beam held at the receiver interrogates a target region bathed in thermal background light. The returne…
Phase-preserving linear amplifiers not simulable by the parametric amplifier
A. Chia, M. Hajdusek, R. Nair +3
It is commonly accepted that a parametric amplifier can simulate a phase-preserving linear amplifier regardless of how the latter is realized [Caves et al., Phys. Rev. A 86, 063802…