Hybrid Method Cuts Molecular Docking Qubits to N/3, Advancing Drug Discovery
Updated
Updated · Quantum Zeitgeist · Aug 23
Hybrid Method Cuts Molecular Docking Qubits to N/3, Advancing Drug Discovery
3 articles · Updated · Quantum Zeitgeist · Aug 23
Summary
Researchers recast molecular docking as a maximum vertex-weighted clique problem, letting a hybrid quantum-classical workflow solve protein-binding calculations with far lower quantum resources.
The key gain came from full-basis encoding using Bloch sphere vectors, which reduced qubit needs to about ⌈N/3⌉ for an N-sized problem versus one qubit per variable in standard approaches.
Tests on two biologically relevant cases recovered optimal binding poses and converged in an acceptable number of optimisation steps on a superconducting quantum computer, with little sensitivity to circuit depth or penalty settings.
The result is a proof of feasibility on current hardware rather than fault-tolerant machines, potentially opening a path to faster structure-based drug design as methods scale to larger protein targets.