3 papers
quant-ph2026
Efficient algorithm for fidelity estimation of two quantum states
Anumita Mukhopadhyay, Shibdas Roy, Arun Kumar Pati
The fidelity estimation between two quantum states is crucial for quantum computation and information science. However, an efficacious method for this, especially for mixed states…
quant-ph2026
No-Signalling Fixes the Hilbert-Space Inner Product
Arun Kumar Pati
We investigate whether the inner product structure of quantum mechanics can be modified without violating fundamental physical principles. We consider a generalized inner product d…
quant-ph2025
Fractional Contribution of Dynamical and Geometric Phases in Quantum Evolution
Arun Kumar Pati, Vlatko Vedral, Erik Sjoqvist
The fundamental division of the total quantum evolution phase into geometric and dynamical components is a central problem in quantum physics. Here, we prove a remarkably simple an…