Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
QDBFT: A Dynamic Consensus Algorithm for Quantum-Secured Blockchain
Fei Xu, Cheng Ye, Ouyang Jie +9 more·Feb 12, 2026
The security foundation of blockchain system relies primarily on classical cryptographic methods and consensus algorithms. However, the advent of quantum computing poses a significant threat to conventional public-key cryptosystems based on computati...
The necessary and sufficient condition for perfect teleportation and superdense coding and all the suitable states for teleportation and superdense coding
Dafa Li·Feb 11, 2026
It is known that two local unitaries (LU) equivalent states possess the same amount of entanglement and can be used to perform the same tasks in quantum information theory (QIT). For a protocol for a task in QIT, we call a protocol LU invariant if tw...
Bosonic statistics enhance Maxwell's demon in photonic experiment
Malaquias Correa Anguita, Sara Marzban, William F. Braasch +4 more·Feb 11, 2026
Maxwell's demon elucidates the value of information in thermodynamics, using measurement and feedback: he evolves an equilibrated gas into a nonequilibrium state, from which one might extract work. The demon can evolve the system farther from equilib...
Unlearnable phases of matter
Tarun Advaith Kumar, Yijian Zou, Amir-Reza Negari +2 more·Feb 11, 2026
We identify fundamental limitations in machine learning by demonstrating that non-trivial mixed-state phases of matter are computationally hard to learn. Focusing on unsupervised learning of distributions, we show that autoregressive neural networks ...
Recirculating Quantum Photonic Networks for Fast Deterministic Quantum Information Processing
Emil Grovn, Matias Bundgaard-Nielsen, Jesper Mørk +2 more·Feb 11, 2026
A fundamental challenge in photonics-based deterministic quantum information processing is to realize key transformations on time scales shorter than those of detrimental decoherence and loss mechanisms. This challenge has been addressed through devi...
Sub-Poissonian Statistics and Quantum Non-Gaussianity from High-Harmonic Generation
David Theidel, Mackrine Nahra, Ilya Karuseichyk +3 more·Feb 11, 2026
Quantum technologies are powered by platforms to generate complex non-classical states of matter or light to realize applications. We investigate the non-classical properties of high-harmonic generation in semiconductors, an emerging photonic platfor...
A QFT information protocol for charged black holes
Paolo Palumbo·Feb 11, 2026
A generalization for the quantum information retrieval protocol recently illustrated by Verlinde and van der Heijden for evaporating black holes is provided to inclusions of type III von Neumann factors. The physical interest of such scenario arises ...
Experimental demonstration that qubits can be cloned at will, if encrypted with a single-use decryption key
Koji Yamaguchi, Leon Rullkötter, Ibrahim Shehzad +3 more·Feb 11, 2026
The no-cloning theorem forbids the creation of identical copies of qubits, thereby imposing strong limitations on quantum technologies. A recently-proposed protocol, encrypted cloning, showed, however, that the creation of perfect clones is theoretic...
Notes on Bell states and quantum teleportation
Yong Zhang, Wei Zeng, Ming Lian·Feb 11, 2026
Bell states and quantum teleportation play important roles in the study of quantum information and computation. But a comprehensive theoretical research on both of them remains to be performed. This work aims to investigate important algebraic proper...
Run-length certificates in quantum learning: sample complexity and noise thresholds
Jeongho Bang·Feb 11, 2026
Quantum learning from state samples is often benchmarked in a fixed-budget paradigm, relating error to a prescribed number of copies. We instead adopt a stopping-time viewpoint: in minimal-feedback learning, the learning completion can be defined by ...
Practical quantum tokens: challenges and perspectives
Nadezhda P. Kukharchyk, Holger Boche, Christian Deppe +21 more·Feb 11, 2026
The concept of quantum tokens dates back alongside quantum cryptography to Stephen Wiesner's seminal work in 1983[1]. Already this initial work proposes society-relevant applications such as secure quantum banknotes, which can be exchanged between a ...
Privacy-Utility Tradeoffs in Quantum Information Processing
Theshani Nuradha, Sujeet Bhalerao, Felix Leditzky·Feb 11, 2026
When sensitive information is encoded in data, it is important to ensure the privacy of information when attempting to learn useful information from the data. There is a natural tradeoff whereby increasing privacy requirements may decrease the utilit...
Multiconfiguration Pair-Density Functional Theory Calculations of Ground and Excited States of Complex Chemical Systems with Quantum Computers
Zhanou Liu, Yuhao Chen, Ying Ma +2 more·Feb 11, 2026
Accurately describing strong electron correlation in complex systems remains a prominent challenge in computational chemistry as near-term quantum algorithms treating total correlation often require prohibitively deep circuits. Here we present a hybr...
Quantum Integrated Sensing and Computation with Indefinite Causal Order
Ivana Nikoloska·Feb 10, 2026
Quantum operations with indefinite causal order (ICO) represent a framework in quantum information processing where the relative order between two events can be indefinite. In this paper, we investigate whether sensing and computation, two canonical ...
Communication complexity bounds from information causality
Nikolai Miklin, Prabhav Jain, Mariami Gachechiladze·Feb 10, 2026
Communication complexity, which quantifies the minimum communication required for distributed computation, offers a natural setting for investigating the capabilities and limitations of quantum mechanics in information processing. We introduce an inf...
Information Theory of Action : Reconstructing Quantum Dynamics from Inference over Action Space
Fabricio Souza Luiz, Marcos César de Oliveira·Feb 10, 2026
We develop an information-theoretic reconstruction of quantum dynamics based on inference over action space. The fundamental object is a density of action states encoding the multiplicity of dynamical alternatives between configurations. Maximum-entr...
Construction of the full logical Clifford group for high-rate quantum Reed-Muller codes using only transversal and fold-transversal gates
Theerapat Tansuwannont, Tim Chan, Ryuji Takagi·Feb 10, 2026
To build large-scale quantum computers while minimizing resource requirements, one may want to use high-rate quantum error-correcting codes that can efficiently encode information. However, realizing an addressable gate$\unicode{x2014}$a logical gate...
Error-mitigated quantum state tomography using neural networks
Yixuan Hu, Mengru Ma, Jiangwei Shang·Feb 10, 2026
The reliable characterization of quantum states is a fundamental task in quantum information science. For this purpose, quantum state tomography provides a standard framework for reconstructing quantum states from measurement data, yet it is often de...
Tunable many-body burst in isolated quantum systems
Shozo Yamada, Akihiro Hokkyo, Masahito Ueda·Feb 10, 2026
Thermalization in isolated quantum many-body systems can be nonmonotonic, with its process dependent on an initial state. We propose a numerical method to construct a low-entangled initial state that creates a "burst" -- a transient deviation of an o...
Compressing Quantum Fisher Information
Rui Jie Tang, Jeremy Guenza Marcus, Noah Lupu-Gladstein +5 more·Feb 10, 2026
We show that the quantum Fisher information about any phase parameter encoded in a family of pure quantum states can be faithfully compressed into a single qubit, accompanied by a logarithmic amount of classical bits. When the phase is encoded into m...