923 citations · 1.7k across the 55 of their papers we have counts for
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Surpassing Gaussian optimality in multiparameter estimation with indefinite causal order
Sudipta Das, Rivu Gupta, Aditi Sen De +1
We identify single-mode Gaussian probes, generated by displacement and squeezing operations on the vacuum state, which are optimal for the simultaneous estimation of displacement a…
Efficient Pauli-decomposition and multistage state-refinement for tensor network based differential equation solver
Vishwabhushan Suresh Gholap, Himadri Shekhar Dhar, Siddhartha Santra
Classical numerical techniques for solving partial differential equations (PDEs) become computationally expensive as the dimension of the discretized differential operator increase…
Quantum information spreading in inhomogeneous spin ensembles
Rahul Gupta, Florian Mintert, Himadri Shekhar Dhar
We present a Krylov space based theoretical framework for modeling inhomogeneous spin ensembles with arbitrary distributions of spin frequencies and couplings. The framework is the…
Optimally Controlled Storage of a Qubit in an Inhomogeneous Spin Ensemble
Rahul Gupta, Florian Mintert, Himadri Shekhar Dhar
The storage of quantum information in spin-ensembles is limited by practically unavoidable inhomogeneous broadening, and the macroscopic number of spins in such an ensemble makes t…
Cavity-Driven Multispectral Gain for High-Sensitivity NV Center Magnetometers
Himanshu Kumar, Rahul Gupta, Saikat Ghosh +2
We report a cavity-enabled solid-state magnetometer based on an NV ensemble coupled with a dielectric cavity, achieving 12 pT/ sensitivity and a nearly threefold ga…