88 citations · 180 across the 14 of their papers we have counts for
14 papers
Transfer-matrix functions for algebraically decaying interactions in variational infinite matrix product states
Qi Yang
Variational infinite matrix product state (iMPS) calculations usually make Hamiltonians with algebraically decaying interactions compatible with standard MPO algorithms by first re…
Stringy Effects on Holographic Complexity: The Complete Volume in Dynamical Spacetimes
Qi Yang, Yu-Xiao Liu
We investigate the stringy effects on holographic complexity in -dimensional Gauss-Bonnet gravity using the ``complete volume'' proposal for higher-curvature theories. Our a…
Topological and Trivial Valence-Bond Orders in Higher-Spin Kitaev Models
Xing-Yu Zhang, Qi Yang, Philippe Corboz +2
We investigate the quantum phases of higher-spin Kitaev models using tensor network methods. Our results reveal distinct bond-ordered phases for spin-1, spin-, and sp…
Accelerating two-dimensional tensor network optimization by preconditioning
Xing-Yu Zhang, Qi Yang, Philippe Corboz +2
We revisit gradient-based optimization for infinite projected entangled pair states (iPEPS), a tensor network ansatz for simulating many-body quantum systems. This approach is hind…
Efficient iPEPS Simulation on the Honeycomb Lattice via QR-based CTMRG
Qi Yang, Philippe Corboz
We develop a QR-based corner transfer matrix renormalization group (CTMRG) framework for contracting infinite projected entangled-pair states (iPEPS) on honeycomb lattices. Our met…
Accelerating two-dimensional tensor network contractions using QR decompositions
Yining Zhang, Qi Yang, Philippe Corboz
Infinite projected entangled-pair states (iPEPS) provide a powerful tool for studying strongly correlated systems directly in the thermodynamic limit. A core component of the algor…
Hydrodynamics of ultralight complex scalar field dark matter and its impact on the growth of structure
Qi Yang, Bohua Li, Paul R. Shapiro
The mass window of ultralight axion dark matter motivated by suppressing the growth of structure on subgalactic scales, , is now severely constrained b…
Alternating and Gaussian fermionic Isometric Tensor Network States
Yantao Wu, Zhehao Dai, Sajant Anand +5
Isometric tensor networks in two dimensions enable efficient and accurate study of quantum many-body states, yet the effect of the isometric restriction on the represented quantum…
Strange Correlator for 1D Fermionic Symmetry-Protected Topological Phases
Yinning Niu, Yang Qi
Strange correlators are useful tools for diagnosing symmetry-protected topological states from their bulk wave functions. We study strange correlators for one-dimensional fermionic…
Real-space recipes for general topological crystalline states
Zhida Song, Chen Fang, Yang Qi
Topological crystalline states are short-range entangled states jointly protected by onsite and crystalline symmetries. While the non-interacting limit of these states, e.g., the t…
Ground state degeneracy in quantum spin systems protected by crystal symmetries
Yang Qi, Chen Fang, Liang Fu
We develop a no-go theorem for two-dimensional bosonic systems with crystal symmetries: if there is a half-integer spin at a rotation center, where the point-group symmetry is $\ma…
Symmetry fractionalization of visons in spin liquids
Yang Qi, Meng Cheng, Chen Fang
In this work we study symmetry fractionalization of vison excitations in topological spin liquids. We show that in the presence of the full spin rot…
Loops, sign structures and emergent Fermi statistics in three-dimensional quantum dimer models
Vsevolod Ivanov, Yang Qi, Liang Fu
We introduce and study three-dimensional quantum dimer models with positive resonance terms. We demonstrate that their ground state wave functions exhibit a nonlocal sign structure…
Effective theory of Fermi pockets in fluctuating antiferromagnets
Yang Qi, Subir Sachdev
We describe fluctuating two-dimensional metallic antiferromagnets by transforming to a rotating reference frame in which the electron spin polarization is measured by its projectio…