-
Mizuki Hamada (Keio University)26/08/2026, 12:20Poster Presentation
Quantum error mitigation is a collection of techniques for reducing the effect of noise when estimating expectation values on noisy quantum computers. In particular, fully virtual purification (FVP) suppresses errors by preparing multiple copies of a noisy quantum state and cyclically permuting them, thereby amplifying the contribution of the dominant eigenstate that is least affected...
Go to contribution page -
Yuji Okochi (Keio University)26/08/2026, 12:20Poster Presentation
Long-range interacting quantum many-body systems have recently been realized in platforms such as trapped-ion systems and Rydberg atom arrays. In theoretical descriptions of long-range interactions, the Kac normalization factor is often introduced to keep the interaction energy per particle finite in the thermodynamic limit. In many models, however, this factor does not emerge naturally from...
Go to contribution page -
Yen Chou (NYCU)26/08/2026, 12:20Poster Presentation
This work applies a tensor-network space–time framework based on the Quantized Tensor Train (QTT) representation to the Gross–Pitaevskii equation (GPE), following the matrix-product-state space–time formulation introduced in Ref. [1]. The wavefunction is encoded as a Matrix Product State, while spatial differential operators, trapping potentials, temporal couplings, and nonlinear interaction...
Go to contribution page -
Ryoma Watanabe (ISSP, the University of Tokyo)26/08/2026, 12:20Poster Presentation
While the concept of the renormalization group (RG) is a highly powerful framework for the phase transitions, applying it analytically to specific systems is generally difficult. In recent years, the Tensor Renormalization Group (TRG), which utilizes Tensor Networks (TNs), has been developed as a method for performing RG calculations numerically with high precision. TRG can be easily executed...
Go to contribution page -
Yusuke Kajiwara (Faculty of Science, Shizuoka University)26/08/2026, 12:20Poster Presentation
In this work, we introduce additional dimer degrees of freedom into classical spin models and investigate their thermodynamic behavior using Monte Carlo simulations. The dimers represent locally correlated spin pairs and are dynamically created, annihilated, and rearranged together with classical spin configurations. This semiclassical approach allows us to study the interplay between magnetic...
Go to contribution page -
Yuya Seki (Keio University)26/08/2026, 12:20Poster Presentation
Adiabatic quantum computation is one approach to solving combinatorial optimization problems. In this talk, we propose a method that first transforms a combinatorial optimization problem into an equivalent continuous optimization problem via polyhedral domain decomposition and then performs adiabatic quantum computation. Since this formulation makes it easy to introduce quantum fluctuations...
Go to contribution page -
Haruki Saito (Department of Physics, Graduate School of Science, the University of Tokyo)26/08/2026, 12:20Poster Presentation
The dynamics of quantum many-body systems are strongly constrained by the conserved quantities and symmetries of their Hamiltonians. Conserved quantities play a fundamental role in phenomena such as thermalization/nonthermalization, transport, and integrability, while the commutation relations among conserved quantities are closely related to continuous symmetries and the underlying algebraic...
Go to contribution page -
Mr Jeong-Hyeok Cha (Seoul National University)26/08/2026, 12:20Poster Presentation
Quantics Tensor Cross Interpolation (QTCI) provides an efficient tensor-network representation of high-resolution functions by encoding physical coordinates into binary degrees of freedom and constructing a tensor train directly from sampled function values. Although QTCI is effective for many structured functions, its efficiency can deteriorate when the target function develops strong...
Go to contribution page -
Dr Sayan Mukherjee (The University of Tokyo)26/08/2026, 12:20Poster Presentation
Higher-order tensor renormalization group (HOTRG) methods coarse-grain a tensor network by iterated blocking, implicitly assuming that the coarse network again admits a finite periodic description. We make this assumption explicit: representing a periodic tensor network as the lift of a finite-cell voltage graph over a group $\Lambda$, an expanding finite-index endomorphism of $\Lambda$...
Go to contribution page -
Sing Hong Chan (National Tsing Hua University)26/08/2026, 12:20Poster Presentation
Critical 2D classical lattice models are analyzed through a method-agnostic finite-size-scaling framework built on tensor-network transfer matrices. The key idea is an explicit crossover length scale that separates the finite-size-scaling regime from the finite-entanglement-scaling regime induced by bond-dimension truncation. Working within this self-consistent finite-size window, the central...
Go to contribution page -
Rentaro Kuromi (Keio university)26/08/2026, 12:20Poster Presentation
The spin-1 XXZ chain with uniaxial single-ion anisotropy exhibits a rich ground-state phase diagram, hosting topologically distinct Haldane and large-D phases alongside various magnetically ordered and gapless phases. In 1986, H. J. Schulz formulated an effective field theory for this system by mapping it onto coupled spin-1/2 chains (i.e., a ladder) and derived its phase diagram via...
Go to contribution page -
Yuheng Sui (Keio University)26/08/2026, 12:20Poster Presentation
Configuration-space truncation is a basic step in quantum-selected configuration interaction and related sample-based diagonalization methods, but the number of basis configurations required to retain a prescribed fraction of a many-body state is generally unknown. We study this intrinsic truncation problem for the fixed-particle-number ground state of the periodic XX, or free-fermion, chain....
Go to contribution page -
Haruyuki Kawabe (BIPROGY Inc.)26/08/2026, 12:20Poster Presentation
Efficient simulation of quantum circuits remains a central challenge in quantum information science. We introduce Matrix Product Evolution (MPE), a tensor-network framework that represents the evolution of each qubit as a tensor train organized along the temporal direction of a circuit. Temporal bond dimensions encode correlations accumulated during circuit evolution, and neighboring MPEs are...
Go to contribution page -
Ryuhei Furuta (University of Electro-Communications)26/08/2026, 12:20Poster Presentation
Neural-network quantum states have been developed as an efficient method for solving quantum many-body problems, not only in lattice systems but also in systems of particles in continuous space. Here, we apply this approach to strongly interacting few-body problems in continuous space at unitarity: the Efimov states and associated few-body bound states. We obtain the ground and first excited...
Go to contribution page -
Dr Jing Zhou (OIST)26/08/2026, 12:20Poster Presentation
Periodically driven magnetic systems provide a versatile platform for controlling collective spin excitations far from equilibrium. We theoretically study a two-dimensional antiferromagnet driven by in-plane polarized light, where the exchange interactions acquire Floquet modulations. The drive induces short-time amplification of selected magnon modes, which can be effectively described by a...
Go to contribution page -
Haruki Shimizu (ISSP, The university of Tokyo)26/08/2026, 12:20Poster Presentation
The Klein bottle ratio provides universal values other than the central charge. Here, we extend the Klein bottle ratio and the $\mathrm{RP}^2$ ratio to non-Hermitian systems with periodic boundary conditions. Using the Yang-Lee model, we confirm the behavior of these ratios, as well as the generalized entanglement entropy. We also observe universal behaviors of these ratios for the...
Go to contribution page -
Junya Yokokura (Department of Physics, Graduate School of Science, The University of Tokyo)26/08/2026, 12:20Poster Presentation
Isometric tensor networks provide globally optimal low-rank approximations without environment computation. However, this property is guaranteed only at the orthogonality center, making node-level parallelization difficult. In contrast, node-level parallelization has been developed based on Vidal canonical form [1,2], though the canonical conditions and the truncation optimality are gradually...
Go to contribution page -
Ashish Joshi (Keio University)26/08/2026, 12:20Poster Presentation
Biological systems, such as cellular metabolism, involve thousands of reactions that together determine how cells grow, respond to their environment, and produce energy. These are interconnected chemical reactions forming metabolic networks. Modeling and analyzing these systems require solving very large mathematical problems that can quickly become computationally prohibitive. To address this...
Go to contribution page -
Jean-Baptiste Touchais (National Cheng Kung University)26/08/2026, 12:20Poster Presentation
Robust propagating in-gap modes due to spin-orbit domain walls in graphene
Recent success in making twisted multilayered graphene and transition metal dichalcogenides, exhibiting Moiré patterns and consequent domain structures on the nanoscale, raises questions about possible topological electronic states on domain walls (DWs) in presence of multiple induced couplings. We investigate...
Go to contribution page -
Mr QianCan Chen (National Tsing Hua University)26/08/2026, 12:20Poster Presentation
We develop a symmetry-resolved QTT framework for two-particle wavefunctions, using permutation parity to target symmetric or antisymmetric spatial states. Applied to H₂ within the Born–Oppenheimer approximation, QTT-DMRG accurately reproduces the ground singlet X 1Σg+ and lowest triplet b 3Σu+ states, with errors reaching 10^-4 Hartree. The second-order Rényi entropy approaches ln(2) at large...
Go to contribution page -
Kiyeon Kim (Seoul National University)26/08/2026, 12:20Poster Presentation
Telum.jl is a non-Abelian tensor network library written entirely in Julia. Its internal Clebsch–Gordan engine, LurCGT.jl, extends the approaches of QSpace and TensorKit.jl to compute symmetry-related quantities for SU(N), Sp(2N), SO(N), and G2 exactly using integer arithmetic and in a deterministic manner. Telum.jl is designed to handle tensors with arbitrary combination of these symmetries,...
Go to contribution page -
Teruhiro Ikeuchi (Keio University)26/08/2026, 12:20Poster Presentation
Quantum master equations are widely used to describe the dynamics of open quantum systems. Among them, the Redfield equation provides high accuracy but may generate unphysical time evolution because it does not preserve positivity. To overcome this issue, the Gorini–Kossakowski–Sudarshan–Lindblad (GKSL) equation, which generates completely positive and trace preserving (CPTP) dynamics, has...
Go to contribution page -
Shoichiro Kado (Graduate School of Informatics, Kyoto university)26/08/2026, 12:20Poster Presentation
Clifford-augmented matrix product states (CAMPS), which combine a Clifford circuit with a matrix product state (MPS), have recently been introduced as an efficient framework for quantum many-body simulations. In this work, we extend the CAMPS framework to transfer-matrix calculations for classical spin systems by exploiting the quantum–classical correspondence. We investigate the extent to...
Go to contribution page
Choose timezone
Your profile timezone: