Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Geometrically Enhanced Topological Quantum Codes
D. Aasen, Jeongwan Haah, Matthew B. Hastings +1 more·May 15, 2025
We consider geometric methods of ``rotating"the toric code in higher dimensions to reduce the qubit count. These geometric methods can be used to prepare higher dimensional toric code states using single shot techniques, and in turn these may be used...
Suppressing measurement noise in logical qubits through measurement scheduling
Xiao-Yue Xu, Chen Ding, Wan-Su Bao·May 12, 2025
Quantum error correction is essential for reliable quantum computation, where surface codes demonstrate high fault-tolerant thresholds and hardware efficiency. However, noise in single-shot measurements limits logical readout fidelity, forming a crit...
Manipulating the topological spin of Majoranas
Stijn R. de Wit, Emre Duman, A. Mert Bozkurt +2 more·May 9, 2025
The non-Abelian exchange statistics of Majorana zero modes make them interesting for both technological applications and fundamental research. Unlike their non-Abelian counterpart, the Abelian contribution, $e^{iθ}$, where $θ$ is directly related to ...
Algebraic Topology Principles behind Topological Quantum Error Correction
Xiang Zou, Hoi-Kwong Lo·May 9, 2025
Quantum error correction (QEC) is crucial for realizing scalable quantum technologies, and topological quantum error correction (TQEC) has emerged as the most experimentally advanced paradigm of QEC. Existing homological and topological code construc...
Sequential decoding of the XYZ$^2$ hexagonal stabilizer code
Basudha Srivastava, Yinzi Xiao, A. F. Kockum +2 more·May 6, 2025
Quantum error correction requires accurate and efficient decoding to optimally suppress errors in the encoded information. For concatenated codes, where one code is embedded within another, optimal decoding can be achieved using a message-passing alg...
One- and two-dimensional cluster states for topological phase simulation and measurement-based quantum computation
Tao Jiang, J. Cai, Junxiang Huang +152 more·May 4, 2025
Symmetry-protected topological (SPT) phases are fundamental features of cluster states, serving as key resources for measurement-based quantum computation (MBQC). Generating large-scale cluster states and verifying their SPT phases are essential step...
The construction of a universal quantum gate set for the SU(2)k (k=5,6,7) anyon models via genetic optimized algorithm
Jiangwei Long, Yizhi Li, Jianxin Zhong +1 more·May 3, 2025
We study systematically numerical method into constructing a universal quantum gate set for topological quantum computation (TQC) using SU(2)k anyon models. The F-matrices and R-symbol were computed through the q-deformed representation theory of SU(...
Quantum Glassiness From Efficient Learning
Eric R. Anschuetz·Apr 30, 2025
We show a relation between quantum learning theory and algorithmic hardness. We use the existence of efficient, local learning algorithms for energy estimation -- such as the classical shadows algorithm -- to prove that finding near-ground states of ...
A Path to Quantum Simulations of Topological Phases: (2+1)D Quantum Electrodynamics with Wilson Fermions
Sriram Bharadwaj, Emil Rosanowski, Simran Singh +5 more·Apr 30, 2025
Quantum simulation offers a powerful approach to studying quantum field theories, particularly (2+1)D quantum electrodynamics (QED$_3$) with Wilson fermions, which hosts a rich landscape of physical phenomena. A key challenge in lattice formulations ...
Systematically improved potential energy surfaces via sinNN models and sparse grid sampling
Antoine Aerts·Apr 30, 2025
Accurate, global Potential Energy Surfaces (PES) expressed in sum-of-products (SOP) form are a prerequisite for efficient high-dimensional quantum dynamics simulations using the MCTDH method. This work introduces a methodology for constructing such s...
Emergence of Hermitian topology from non-Hermitian knots
Gaurav Hajong, Ranjan Modak, Bhabani Prasad Mandal·Apr 28, 2025
The non-Hermiticity of the system gives rise to a distinct knot topology in the complex eigenvalue spectrum, which has no counterpart in Hermitian systems. In contrast, the singular values of a non-Hermitian (NH) Hamiltonian are always real by defini...
Gapped Boundaries of Kitaev's Quantum Double Models: A Lattice Realization of Anyon Condensation from Lagrangian Algebras
Mu Li, Xiao-Han Yang, Xiao-Yu Dong·Apr 28, 2025
The macroscopic theory of anyon condensation, rooted in the categorical structure of topological excitations, provides a complete classification of gapped boundaries in topologically ordered systems, where distinct boundaries correspond to the conden...
Braiding of Majorana zero modes in vortex cores
Maxwell Buss, Jasmin Bedow, Prashant Gupta +1 more·Apr 23, 2025
We demonstrate the successful simulation of $\sqrt{Z}$-, $\sqrt{X}$- and $X$-quantum gates using Majorana zero modes (MZMs) that emerge in magnetic vortices located in topological superconductors. We compute the transition probabilities and geometric...
Topological properties of curved spacetime extended Su-Schrieffer-Heeger model
Priyanuj Rajbongshi, Ranjan Modak·Apr 22, 2025
The Su-Schrieffer-Heeger (SSH) model, a prime example of a one-dimensional topologically nontrivial insulator, has been extensively studied in flat space-time. In recent times, many studies have been conducted to understand the properties of the low-...
Robust mixed-state cluster states and spurious topological entanglement negativity
Seunghun Lee, Eun-Gook Moon·Apr 22, 2025
We investigate 1D and 2D cluster states under local decoherence to assess the robustness of their mixed-state subsystem symmetry-protected topological (SSPT) order. By exactly computing fidelity correlators via dimensional reduction of effective stat...
Quantum simulation of interacting bosons with propagating waveguide photons
Xinyuan Zheng, M. J. Mehrabad, A. Dutt +2 more·Apr 21, 2025
Optical networks composed of interconnected waveguides are a versatile platform to simulate bosonic physical phenomena. Significant work in the non-interacting regime has demonstrated the capabilities of this platform to simulate many exotic effects ...
Hopf Exceptional Points
Tsuneya Yoshida, Emil J. Bergholtz, Tomáš Bzdušek·Apr 17, 2025
Exceptional points at which eigenvalues and eigenvectors of non-Hermitian matrices coalesce are ubiquitous in the description of a wide range of platforms from photonic or mechanical metamaterials to open quantum systems. Here, we introduce a class o...
Probing Quantum Anomalous Hall States in Twisted Bilayer WSe2 via Attractive Polaron Spectroscopy
Beini Gao, Mahdi Ghafariasl, Mahmoud Jalali Mehrabad +15 more·Apr 15, 2025
Moiré superlattices in semiconductors exhibit a rich variety of interaction-induced topological states, including quantum anomalous Hall (QAH) effects. A recent study hinted that twisted WSe2 homobilayer (tWSe2) could host a QAH state but lacked dire...
Q-ball mechanism of electron transport properties of high-T$_c$ superconductors
S. I. Mukhin·Apr 13, 2025
A theory is presented of a mechanism of high-Tc superconductivity in cuprates, based on the fact that 'nested' fermionic states near the Fermi surface of electrons/holes cause instability with respect to formation of the Q-balls (nontopological solit...
SW-TNC : Reaching the Most Complex Random Quantum Circuit via Tensor Network Contraction
Yaojian Chen, Zhaoqi Sun, Cheng Qiu +5 more·Apr 12, 2025
Classical simulation is essential in quantum algorithm development and quantum device verification. With the increasing complexity and diversity of quantum circuit structures, existing classical simulation algorithms need to be improved and extended....