Papers
Tsim: Fast Universal Simulator for Quantum Error Correction
Rafael Haenel, Xiuzhe Luo, Chen Zhao·Apr 1, 2026
We present Tsim, an open-source high-throughput simulator for universal noisy quantum circuits targeting quantum error correction. Tsim represents quantum circuits as ZX diagrams, where Pauli channels are modeled as parameterized vertices. Diagrams a...
Distilling Unitary Operations: A No-Go Theorem and Minimal Realization
Jiayi Zhao, Yu-Ao Chen, Guocheng Zhen +3 more·Apr 1, 2026
Quantum gates executed on physical hardware are inevitably degraded by environmental noise. While state purification effectively distills static quantum resources, the dynamic execution of quantum algorithms requires a higher-order approach to mitiga...
Properties of multiqubit variational quantum states representing weighted graphs and their computing with quantum programming
Kh. P. Gnatenko, A. Kaczmarek·Apr 1, 2026
We study multiqubit variational quantum states that can be considered as weighted quantum graph states. These states are constructed as single-layer variational circuits with $RX$ rotations and $RZZ$ entangling gates, corresponding to graphs of arbit...
Unitary Encoding of Thermal States via Thermofield Dynamics on Quantum Computers
G. X. A. Petronilo, M. R. Araújo, A. B. M. Souza +1 more·Apr 1, 2026
Quantum computing has attracted the attention of the scientific community in the past few decades. However, despite some relevant advantages, near-term quantum devices remain severely limited by thermal effects, which induce decoherence and restrict ...
Quantum machine learning for the quantum lattice Boltzmann method: Trainability of variational quantum circuits for the nonlinear collision operator across multiple time steps
Antonio David Bastida Zamora, Ljubomir Budinski, Pierre Sagaut +1 more·Apr 1, 2026
This study investigates the application of quantum machine learning (QML) to approximate the nonlinear component of the collision operator within the quantum lattice Boltzmann method (QLBM). To achieve this, we train a variational quantum circuit (VQ...
Braiding and exchange statistics of liquid crystalline Majorana quasiparticles
A. I. Tóth, G. Negro, A. D. Huxley +1 more·Apr 1, 2026
Liquid crystalline defects in 3D can be viewed as geometric spinors, whose emergent properties are reminiscent of those of topological excitations in quantum condensed matter, such as Majorana quasiparticles. However, it is unclear how deep this anal...
Hybrid Classical--Quantum Optimization of Wireless Routing Using QAOA and Quantum Walks
Eric Howard, Hardique Dasore, Hom Nath Dhungana +4 more·Apr 1, 2026
Routing in wireless communication networks is shaped by mobility, interference, congestion, and competing service requirements, making route selection a high-dimensional constrained optimization problem rather than a simple shortest-path task. This p...
Quantum Non-Moduler Multiplication with QFT-Based Multi Input Parallelized Adder
Murat Kurtand Selçuk Çakmak, Azmi Gençten·Mar 31, 2026
In this study, we propose an efficient quantum multiplication approach based on a QFT-assisted parallelized addition scheme. The multiplication stage is implemented using a structure composed entirely of Toffoli gates, which generate partial products...
A Security-Aware Nonlinearity Study of FPGA-Based Time-to-Digital Converters for Quantum Key Distribution Systems
Kun Qin, Carsten Trinitis·Mar 31, 2026
Intrinsic nonlinearity in FPGA-based time-to-digital converters (TDCs) is often treated as a calibration issue and evaluated mainly through post-correction metrics. In quantum key distribution (QKD), however, raw delay-line nonuniformity can affect c...
Building Block For Universal Continuous Variables Computation In Superconducting Devices
Bruno A. Veloso, Ciro M. Diniz, Luiz O. R. Solak +3 more·Mar 31, 2026
Continuous variable (CV) quantum computation offers an alternative to qubit-based computing by exploiting the infinite-dimensional Hilbert space of bosonic modes. Despite recent progress, superconducting platforms have yet to demonstrate a scalable a...
LLM-Guided Evolutionary Search for Algebraic T-Count Optimization
Daniil Fisher, Valentin Khrulkov, Mikhail Saygin +2 more·Mar 31, 2026
Reducing the non-Clifford cost of fault-tolerant quantum circuits is a central challenge in quantum compilation, since T gates are typically far more expensive than Clifford operations in error-corrected architectures. For Clifford+T circuits, minimi...
Inverse Design of Strongly Localized Topological $π$ Modes in One-Dimensional Nonperiodic Systems
Fumitatsu Iwase·Mar 31, 2026
This study investigates the spatial confinement of topological $π$-modes in one-dimensional chiral-symmetric systems. In conventional periodic and quasiperiodic structures, edge-mode wave functions inevitably penetrate the bulk. To suppress this, inv...
Topological sum rule for geometric phases of quantum gates
Nadav Orion, Boris Rotstein, Nirron Miller +1 more·Mar 31, 2026
We establish a topological sum rule, $ν_U = \frac{1}{2π}\sum_nγ_n = 2mν_H$, connecting the geometric phases accumulated by a two-qubit system over a complete basis of initial states to the winding number $ν_H$ classifying its Hamiltonian. Implementat...
Logical-to-Physical Compilation for Reducing Depth in Distributed Quantum Systems
Folkert de Ronde, Stephan Wong, Sebastian Feld·Mar 31, 2026
Quantum computing is expected to become a foundational technology for solving problems that exceed the capabilities of classical systems. As quantum algorithms and hardware technologies continue to advance, the need for scalable architectures becomes...
Multipartite controlled-NOT gates using molecules and Rydberg atoms
Yi-Han Bai, Yue Wei, Chi Zhang +2 more·Mar 31, 2026
We propose high-fidelity controlled-NOT (CNOT) gates in a hybrid system of polar molecules and Rydberg atoms based on the unconventional Rydberg pumping mechanism. By combining the rich internal structure of polar molecules with the strong dipole-dip...
On the Entanglement Entropy Distribution of a Hybrid Quantum Circuit
Jeonghyeok Park, Hyukjoon Kwon, Hyeonseok Jeong·Mar 31, 2026
We investigate the distribution of entanglement entropy in hybrid quantum circuits consisting of random unitary gates and local measurements applied at a finite rate. We demonstrate that higher moments of the entanglement entropy distribution, such a...
Hybrid Quantum-Classical AI for Industrial Defect Classification in Welding Images
Akshaya Srinivasan, Xiaoyin Cheng, Jianming Yi +4 more·Mar 30, 2026
Hybrid quantum-classical machine learning offers a promising direction for advancing automated quality control in industrial settings. In this study, we investigate two hybrid quantum-classical approaches for classifying defects in aluminium TIG weld...
Securing Elliptic Curve Cryptocurrencies against Quantum Vulnerabilities: Resource Estimates and Mitigations
Ryan Babbush, Adam Zalcman, Craig Gidney +6 more·Mar 30, 2026
This whitepaper seeks to elucidate implications that the capabilities of developing quantum architectures have on blockchain vulnerabilities and mitigation strategies. First, we provide new resource estimates for breaking the 256-bit Elliptic Curve D...
Construction and characterization of measures in block coherence resource theory
Xiangyu Chen, Qiang Lei·Mar 30, 2026
Quantum coherence, as a direct manifestation of the quantum superposition principle, is a crucial resource in quantum information processing. Block coherence resource theory generalizes the traditional coherence framework by defining coherence via a ...
The Power of Power-of-SWAP: Postselected Quantum Computation with the Exchange Interaction
Jędrzej Burkat, Sergii Strelchuk, Michał Studziński·Mar 30, 2026
We introduce Exchange Quantum Polynomial Time (XQP) circuits, which comprise quantum computation using only computational basis SPAM and the isotropic Heisenberg exchange interaction. Structurally, this sub-universal model captures decoherence-free s...