8 papers
Modular non-Hermitian topology and its application to critical sensing
Saubhik Sarkar, Chiranjib Mukhopadhyay, Abolfazl Bayat
Non-Hermitian topological systems have attracted a lot of research activities in recent times, both theoretically and experimentally, due to their unique physical properties and as…
Quantum-enhanced sensing of spin-orbit coupling without fine tuning
Bin Yi, Abolfazl Bayat, Saubhik Sarkar
Spin-orbit coupling plays an important role in both fundamental physics and technological applications. Precise estimation of the spin-orbit coupling is necessary for accurate desi…
Observation of Criticality-Enhanced Quantum Sensing in Nonunitary Quantum Walks
Lei Xiao, Saubhik Sarkar, Kunkun Wang +2
Quantum physics enables parameter estimation with precisions beyond the capability of classical sensors. Quantum criticality is a key resource for this quantum-enhanced sensing, bu…
Enhanced image classification via hybridizing quantum dynamics with classical neural networks
Ruiyang Zhou, Saubhik Sarkar, Sougato Bose +1
The integration of quantum computing and machine learning has emerged as a promising frontier in computational science. We present a hybrid protocol which combines classical neural…
Metrological symmetries in singular quantum multi-parameter estimation
George Mihailescu, Saubhik Sarkar, Abolfazl Bayat +2
The theoretical foundation of quantum sensing is rooted in the Cramér-Rao formalism, which establishes quantitative precision bounds for a given quantum probe. In many practical s…
Review: Quantum Metrology and Sensing with Many-Body Systems
Victor Montenegro, Chiranjib Mukhopadhyay, Rozhin Yousefjani +4
The main power of quantum sensors is achieved when the probe is composed of several particles. In this situation, quantum features such as entanglement contribute to enhancing the…