Welcome

Welcome to the web pages of the Quantum Information Group at the University of Tokyo.

In recent years, it has been discovered that the laws of quantum mechanics can be used to help process information in ways impossible or inefficient with conventional, classical computing, leading to the new and rapidly growing field of quantum information.
Entanglement (non-local quantum correlations) has become recognised as a key resource in this field.

In our group, we investigate new properties of multiparty and high dimensional entanglement, and the use of these properties in quantum information processing.

Recent Publications

• Exponential separation in quantum query complexity of the quantum switch with respect to simulations with standard quantum circuits (arXiv:2409.18420 (2024))
• Can the quantum switch be deterministically simulated? (arXiv:2409.18202 (2024))
• Multicopy quantum state teleportation with application to storage and retrieval of quantum programs (arXiv:2409.10393 (2024))
• One-to-one Correspondence between Deterministic Port-Based Teleportation and Unitary Estimation (arXiv:2408.11902 (2024))
• Analytical lower bound on query complexity for transformations of unknown unitary operations (arXiv:2405.07625 (2024))
• Concatenate codes, save qubits (arXiv:2402.09606 (2024))
• Universal adjointation of isometry operations using transformation of quantum supermaps (arXiv:2401.10137 (2024))
• Energy-Consumption Advantage of Quantum Computation (arXiv: 2305.11212 (2023))
• Quantum Ridgelet Transform: Winning Lottery Ticket of Neural Networks with Quantum Computation (Proceedings of The Fortieth International Conference on Machine Learning (ICML2023), accepted)
• Low-depth random Clifford circuits for quantum coding against Pauli noise using a tensor-network decoder (arXiv: 2212.05071 (2022))