Author

Bharath Sambasivam

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Preprint Oct 2026

Post-Optimization Subspace Corrections to Quantum Ans\"atze

Identity-augmented q-sc-EOM improves molecular potential-energy curves obtained from truncated ADAPT-VQE ans\"atze with limited expressivity and recovers accuracy from states produced by sampled operator ranking without additional gradient-based operator selection, providing an advantage when small pool gradients make...

P. F. Kwao, Bharath Sambasivam, Jason Saroni et al. · 0 citations

Preprint Sep 2026

A Case Study on Noise Resilient Operator Selection in Adaptive Variational Quantum Algorithms

This work examines the impact of a variety of noise channels on the critical operator selection step of ADAPT-VQE, showing that, despite the selection criterion's natural resilience to some noise, both coherent and incoherent noise can prevent convergence for sufficiently high noise rates.

Soorya Haravu, Mafalda Ramôa, Bharath Sambasivam · 0 citations