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quant-ph2025
Breaking Quantum Key Distributions under Quantum Switch-Based Attack
Sumit Nandi, Biswaranjan Panda, Pankaj Agrawal +1
Quantum key distribution (QKD) enables secure key sharing between distant parties, with several protocols proven resilient against conventional eavesdropping strategies. Here, we i…
quant-ph2024
Stronger speed limit for observables: Tight bound for the capacity of entanglement, the modular Hamiltonian and the charging of a quantum battery
Divyansh Shrimali, Biswaranjan Panda, Arun Kumar Pati
How fast an observable can evolve in time is answered by so-called ``observable speed limit". Here, we prove a stronger version of the observable speed limit and show that the prev…
quant-ph2023
Bi-Quadratic Improvement in Conditional Quantum Search
Akankshya Dash, Biswaranjan Panda, Arun K Pati
The Grover search algorithm performs an unstructured search of a marked item in a database quadratically faster than classical algorithms and is shown to be optimal. Here, we show…