RIKEN Center for Quantum Computing Analytical Quantum Complexity RIKEN Hakubi Research Team
RIKEN Hakubi Team Leader: Tomotaka Kuwahara (Ph.D.)
Research Summary
The field of revealing the computational complexity of quantum many-body system simulations when using a classical computer (or quantum computer) is called Hamiltonian Complexity. In particular, from the viewpoint of quantum supremacy of quantum computers and quantum algorithms employing NISQ (i.e., a small quantum computer without error correction), Hamiltonian complexity has become one of the most important research topics in the field of quantum information. Our research aims to solve open mathematical problems in Hamiltonian complexity.
Main Research Fields
- Mathematical & Physical Sciences
Related Research Fields
- Engineering
- Informatics
- Interdisciplinary Science & Engineering
- Mathematical physics and fundamental theory of condensed matter physics-related
Keywords
- Quantum computing
- Quantum entanglement
- Hamiltonian complexity
- Quantum many-body physics
- Quantum algorithm
Selected Publications
- 1.
T. Kuwahara, K. Saito,
"Exponential Clustering of Bipartite Quantum Entanglement at Arbitrary Temperatures"
Physical Review X, 12, 021022 (2022) - 2.
T. Minato, K. Sugimoto, T. Kuwahara, and K. Saito,
"Fate of Measurement-Induced Phase Transition in Long-Range Interactions"
Phys. Rev. Lett. 128, 010603 (2022) - 3.
T. Kuwahara, K. Saito,
"Lieb-Robinson Bound and Almost-Linear Light Cone in Interacting Boson Systems"
Phys. Rev. Lett. 127, 070403 (2021) - 4.
A. Anshu, S. Arunachalam, T. Kuwahara, M. Soreimanifar (alphabet order),
"Sample-efficient learning of quantum many-body systems,"
Nature Physics, 17, 931–935 (2021) - 5.
T. Kuwahara, A. M. Alhambra, and A. Anshu,
"Improved thermal area law and quasi-linear time algorithm for quantum Gibbs states,"
Physical Review X, 11, 11047 (2021) - 6.
T. Kuwahara, K. Saito,
"Absence of Fast Scrambling in Thermodynamically Stable Long-Range Interacting Systems"
Physical Review Letters, 126, 030604 (2021) - 7.
T. Kuwahara, K. Saito,
"Area law of noncritical ground states in 1D long-range interacting systems"
Nature Communications, 11 4478 (2020) - 8.
T. Kuwahara, K. Saito,
"Strictly Linear Light Cones in Long-Range Interacting Systems of Arbitrary Dimensions,"
Physical Review X, 10, 031010 (2020) - 9.
T. Kuwahara, K. Kato, F. Brandao,
"Clustering of Conditional Mutual Information for Quantum Gibbs States above a Threshold Temperature,"
Physical Review Letters, 124, 220601 (2020) - 10.
T. Kuwahara, Keiji Saito,
"Eigenstate Thermalization from the Clustering Property of Correlation"
Physical Review Letters, 124, 200604 (2020)
Recent Research Results
-
Jul. 25, 2024
Boson systems break the finite speed limit
Related Links
Lab Members
Principal investigator
- Tomotaka Kuwahara
- RIKEN Hakubi Team Leader
Core members
- Yusuke Kimura
- Research Scientist
- Donghoon Kim
- Postdoctoral Researcher
- Cheng Shang
- Junior Research Associate
Careers
Position | Deadline |
---|---|
Seeking a few Research Scientist or Postdoctoral Researcher (W23103) | Open until filled |
Contact Information
RIKEN Main Research Building 335,337
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: tomotaka.kuwahara [at] riken.jp