Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Long-range nonstabilizerness and quantum codes, phases, and complexity
Fuchuan Wei, Zi-Wen Liu·Mar 6, 2025
As a necessary resource for quantum computational advantage, quantum magic (nonstabilizerness) is of fundamental importance in the study of quantum computation and physics. We develop a systematic theory of \emph{long-range magic (LRM)} -- nonstabili...
Anyon Theory and Topological Frustration of High-Efficiency Quantum Low-Density Parity-Check Codes.
Keyang Chen, Yuanting Liu, Yiming Zhang +4 more·Mar 6, 2025
Quantum low-density parity-check (QLDPC) codes offer a promising path to low-overhead fault-tolerant quantum computation but lack systematic strategies for exploration. In this Letter, we establish a topological framework for studying the bivariate-b...
Generalized toric codes on twisted tori for quantum error correction
Zijian Liang, Ke Liu, Hao Song +1 more·Mar 5, 2025
The Kitaev toric code is widely considered one of the leading candidates for error correction in fault-tolerant quantum computation. However, direct methods to increase its logical dimensions, such as lattice surgery or introducing punctures, often i...
Scalable Memory Recycling for Large Quantum Programs
Israel Reichental, Ravid Alon, Lior Preminger +2 more·Mar 2, 2025
As quantum computing technology advances, the complexity of quantum algorithms increases, necessitating a shift from low-level circuit descriptions to high-level programming paradigms. This paper addresses the challenges of developing a compilation a...
Characterizing dynamical behaviors in topological open systems with boundary dissipations
Zhen-Yu Zheng, Xueliang Wang, Shu Chen·Mar 1, 2025
We investigate the dynamics of the Su-Schrieffer-Heeger model with boundary dissipations described by Lindblad master equations and unravel distinct dynamical features in the topologically different phases of the underlying Hamiltonian. By examining ...
Simulating non-Abelian statistics of parafermions with superconducting processor
Hongyu Wang, Xiong-jun Liu·Feb 27, 2025
Parafermions, which can be viewed as a fractionalized version of Majorana modes, exhibit profound non-Abelian statistics and emerge in topologically ordered systems, while their realization in experiment has been challenging. Here we propose a novel ...
The Octo-Rail Lattice: a four-dimensional cluster state design
Emil E. B. Østergaard, Niklas Budinger, Mikkel V. Larsen +3 more·Feb 26, 2025
Macronode cluster states are promising for fault-tolerant continuous-variable quantum computation, combining gate teleportation via homodyne detection with the Gottesman-Kitaev-Preskill code for universality and error correction. While the two-dimens...
Information-theoretic principle of emergent 1-form symmetries
Yu-Jie Liu, Wen-Tao Xu, Frank Pollmann +1 more·Feb 24, 2025
Higher-form symmetries act on sub-dimensional spatial manifolds of a quantum system. They can emerge as an exact symmetry at low energies even when they are explicitly broken at the microscopic level, making them difficult to characterize. In this wo...
Existence and Characterisation of Bivariate Bicycle Codes
Jasper J. Postema, S. Kokkelmans·Feb 24, 2025
Encoding quantum information in a quantum error correction (QEC) code offers protection against decoherence and enhances the fidelity of qubits and gate operations. One of the fundamental challenges of QEC is to construct codes with asymptotically go...
Digitized counterdiabatic quantum critical dynamics
Anne-Maria Visuri, Alejandro Gomez Cadavid, Balaganchi A. Bhargava +6 more·Feb 20, 2025
We experimentally demonstrate that a digitized counterdiabatic quantum protocol reduces the number of topological defects created during a fast quench across a quantum phase transition. To show this, we perform quantum simulations of one- and two-dim...
Decoherence-induced self-dual criticality in topological states of matter
Qingyuan Wang, Romain Vasseur, Simon Trebst +2 more·Feb 19, 2025
Quantum measurements performed on a subsystem of a quantum many-body state can generate entanglement for its remaining constituents. The whole system including the measurement record is described by a hybrid mixed state, which can exhibit exotic phas...
Predictive simulations of the dynamical response of mesoscopic devices
S. Boutin, Torsten Karzig, Tareq El Dandachi +4 more·Feb 18, 2025
As the complexity of mesoscopic quantum devices increases, simulations are becoming an invaluable tool for understanding their behavior. This is especially true for the superconductor-semiconductor heterostructures used to build Majorana-based topolo...
Increasing the distance of topological codes with time vortex defects
Gilad Kishony, Erez Berg·Feb 17, 2025
We propose modifying topological quantum error correcting codes by incorporating space-time defects, termed ``time vortices,'' to reduce the number of physical qubits required to achieve a desired logical error rate. A time vortex is inserted by addi...
Roadmap to fault tolerant quantum computation using topological qubit arrays
D. Aasen, M. Aghaee, Zulfi Alam +179 more·Feb 17, 2025
We describe a concrete device roadmap towards a fault-tolerant quantum computing architecture based on noise-resilient, topologically protected Majorana-based qubits. Our roadmap encompasses four generations of devices: a single-qubit device that ena...
Programmable photonic waveguide arrays: opportunities and challenges
Yang Yang, Akram Youssry, A. Peruzzo·Feb 17, 2025
The rising complexity of photonic applications, ranging from quantum computing to neuromorphic processing, has driven the demand for highly programmable and scalable photonic integrated circuits. While mesh-based architectures built from Mach-Zehnder...
SWAP Attack: Stealthy Side-Channel Attack on Multi-Tenant Quantum Cloud System
Wei Jie Bryan Lee, Siyi Wang, Suman Dutta +2 more·Feb 14, 2025
The rapid advancement of quantum computing has spurred widespread adoption, with cloud-based quantum devices gaining traction in academia and industry. This shift raises critical concerns about the privacy and security of computations on shared, mult...
A topological theory for qLDPC: non-Clifford gates and magic state fountain on homological product codes with constant rate and beyond the N1/3 distance barrier
Guanyu Zhu·Jan 31, 2025
We develop a topological theory for fault-tolerant quantum computation in quantum low-density parity-check (qLDPC) codes. We show that there exist hidden simplicial or CW complex structures encoding the topological data for all qLDPC and CSS codes ob...
Quantum phase transitions between symmetry-enriched fracton phases
Julian Boesl, Yu-Jie Liu, Wen-Tao Xu +2 more·Jan 30, 2025
Topologically ordered phases exhibit further complexity in the presence of global symmetries: Their anyonic excitations may exhibit different transformation patterns under these symmetries, leading to a classification in terms of symmetry-enriched to...
Engineering of Anyons on M5-Probes via Flux Quantization
Hisham Sati, Urs Schreiber·Jan 29, 2025
These extended lecture notes survey a novel derivation of anyonic topological order (as seen in fractional quantum Hall systems) on single magnetized M5-branes probing Seifert orbi-singularities ("geometric engineering" of anyons), which we motivate ...
Braiding Majoranas in a linear quantum dot-superconductor array: Mitigating the errors from Coulomb repulsion and residual tunneling
Sebastian Miles, Francesco Zatelli, A. Mert Bozkurt +2 more·Jan 27, 2025
Exchanging the positions of two non-Abelian anyons transforms between many-body wavefunctions within a degenerate ground-state manifold. This behavior is fundamentally distinct from fermions, bosons and Abelian anyons. Recently, quantum dot-supercond...