Automatic quantum circuit encoding of a given arbitrary quantum state
We introduce a quantum-classical hybrid algorithm, named automatic quantum circuit encoding (AQCE), that is designed to encode an arbitrary quantum state onto an optimal quantum circuit composed of a finite set of single- and two-qubit quantum gates.
The algorithm sequentially determines two-qubit unitary operators using singular value decomposition of the fidelity tensor, without assuming a predefined circuit ansatz or requiring parameter optimization of parametrized quantum gates.
Numerical demonstrations include ground states of quantum many-body systems and amplitude encoding of classical data, with experimental validation using an IBM Quantum device.
Hiroshi Ueda is an Associate Professor at the Center for Quantum Information and Quantum Biology (QIQB), The University of Osaka.
His research focuses on tensor network methods, quantum many-body physics, quantum algorithms, and quantum-classical hybrid computation. He develops theoretical and numerical approaches for understanding quantum many-body systems and for designing quantum algorithms inspired by tensor network structures.