Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Macroscopic "Lola/Mola" Cat State
Harman Deep Kaur, Mariagrazia Trapanese, Kirill Zatrimaylov·Mar 30, 2025
We present the first--ever example of a macroscopic system in a quantum superposition. The system in question is a Siamese cat known as Lola; however, on a time scale of about 12 hours it oscillates into a different state that we refer to as "Mola". ...
Quantitative imaging of nonlinear spin-wave propagation using diamond quantum sensors
Kensuke Ogawa, Moeta Tsukamoto, Yusuke Mori +7 more·Mar 30, 2025
Spin waves propagating in magnetic materials exhibit nonlinear behavior at large amplitudes due to the competition between excitation and relaxation, providing an attractive platform for exploring nonlinear wave dynamics. In particular, spin waves wi...
Multi-image quantum encryption scheme using blocks of bit planes and images
Claire Levaillant·Mar 30, 2025
We present a multi-image quantum encryption/decryption scheme based on blocks of bit planes and images. We provide a quantum circuit for the quantum baker map.
Measurement-induced back-action in a QD-based coherent spin-photon interface
Adrià Medeiros, M. Gundín, Dario A Fioretto +10 more·Mar 30, 2025
Polarization-encoded spin-photon interfaces constitute promising candidates for the development of stationary nodes used as photon receivers, for quantum communication and distributed quantum computing. Here we introduce a time-resolved tomography ap...
Quantum Methods for Managing Ambiguity in Natural Language Processing
Jurek Eisinger, Ward Gauderis, Lin de Huybrecht +1 more·Mar 30, 2025
The Categorical Compositional Distributional (DisCoCat) framework models meaning in natural language using the mathematical framework of quantum theory, expressed as formal diagrams. DisCoCat diagrams can be associated with tensor networks and quantu...
Quasi-cyclic Linear Error-Block Code-based Post-quantum Signature
I. Cherkaoui, S. Belabssir, J. Horgan +1 more·Mar 30, 2025
Shor algorithm led to the discovery of multiple vulnerabilities in a number of cryptosystems. As a result, post-quantum cryptography attempts to provide cryptographic solutions that can face these attacks, ensuring the security of sensitive data in a...
Wagner's Algorithm Provably Runs in Subexponential Time for SIS∞
L´eo Ducas, Lynn Engelberts, Johanna Loyer·Mar 29, 2025
At CRYPTO 2015, Kirchner and Fouque claimed that a carefully tuned variant of the Blum-Kalai-Wasserman (BKW) algorithm (JACM 2003) should solve the Learning with Errors problem (LWE) in slightly subexponential time for modulus $q=\mathrm{poly}(n)$ an...
Enhanced Variational Quantum Kolmogorov-Arnold Network
Hikaru Wakaura, Rahmat Mulyawan, Andriyan B. Suksmono·Mar 28, 2025
The Kolmogorov-Arnold Network (KAN) is a novel multi-layer network model recognized for its efficiency in neuromorphic computing, where synapses between neurons are trained linearly. Computations in KAN are performed by generating a polynomial vector...
Exploration of Design Alternatives for Reducing Idle Time in Shor's Algorithm: A Study on Monolithic and Distributed Quantum Systems
Moritz Schmidt, Abhoy Kole, Leon Wichette +3 more·Mar 28, 2025
Shor's algorithm is one of the most prominent quantum algorithms, yet finding efficient implementations remains an active research challenge. While many approaches focus on low-level modular arithmetic optimizations, a broader perspective can provide...
Spatial Mode Encoding for Quantum Key Distribution: From Hundreds to Thousands of Modes
Lukas Scarfe, Yingwen Zhang, Ebrahim Karimi·Mar 28, 2025
Here, we present a proof-of-principle high-dimensional quantum key distribution (QKD) protocol utilizing the position and momentum entanglement of photon pairs. The protocol exploits the fact that position and momentum form mutually unbiased bases, l...
Feedback Connections in Quantum Reservoir Computing with Mid-Circuit Measurements
Jakob Murauer, R. Krishnakumar, Sabine Tornow +1 more·Mar 28, 2025
Existing approaches to quantum reservoir computing can be broadly categorized into restart-based and continuous protocols. Restart-based methods require reinitializing the quantum circuit for each time step, while continuous protocols use mid-circuit...
Quantum error correction for long chains of trapped ions
Min Ye, Nicolas Delfosse·Mar 28, 2025
We propose a model for quantum computing with long chains of trapped ions and we design quantum error correction schemes for this model. The main components of a quantum error correction scheme are the quantum code and a quantum circuit called the ...
Order-of-magnitude extension of qubit lifetimes with a decoherence-free subspace quantum error correction code
S. Dasu, B. Criger, C. Foltz +9 more·Mar 28, 2025
Constructing an efficient and robust quantum memory is central to the challenge of engineering feasible quantum computer architectures. Quantum error correction codes can solve this problem in theory, but without careful design it can introduce daunt...
Towards Robust Variational Quantum Simulation of Lindblad Dynamics via Stochastic Magnus Expansion
Jiachen Huang, Hao-En Li, Yi-Cheng Wang +3 more·Mar 28, 2025
In this paper, we introduce a novel and general framework for the variational quantum simulation of Lindblad equations. Building on the close relationship between the unraveled Lindblad dynamics, stochastic Magnus integrators, and variational quantum...
Definitive Proof of the Classical Multiverse!
B. Cour, Noah A. Davis·Mar 28, 2025
Recent astonishing experiments with quantum computers have demonstrated unambiguously the existence of a quantum multiverse, where calculations of mind-boggling complexity are effortlessly computed in just a few minutes. Here, we investigate whether ...
Avoiding Convergence Stagnation in a Quantum Circuit Evolutionary Framework Through an Adaptive Cost Function
B. Fernandez, R. Bloot, Marcelo A. Moret·Mar 28, 2025
Binary optimization problems are emerging as potential candidates for useful applications of quantum computing. Among quantum algorithms, the quantum approximate optimization algorithm (QAOA) is currently considered the most promising method to obtai...
Quantum Doeblin Coefficients: Interpretations and Applications
Ian George, Christoph Hirche, Theshani Nuradha +1 more·Mar 28, 2025
In classical information theory, the Doeblin coefficient of a classical channel provides an efficiently computable upper bound on the total-variation contraction coefficient of the channel, leading to what is known as a strong data-processing inequal...
A Quantum Search Method for Quadratic and Multidimensional Knapsack Problems
Soren Wilkening, Andreea-Iulia Lefterovici, Lennart Binkowski +5 more·Mar 28, 2025
Solving combinatorial optimization problems is a promising application area for quantum algorithms in real-world scenarios. In this work, we extend the “Quantum Tree Generator” (QTG), previously proposed for the 0-1 Knapsack Problem, to the 0-1 Quadr...
The moment polytope of matrix multiplication is not maximal
Maxim van den Berg, Matthias Christandl, Vladimir Lysikov +3 more·Mar 28, 2025
Moment polytopes of tensors, the study of which is deeply rooted in invariant theory, representation theory and symplectic geometry, have found relevance in numerous places, from quantum information (entanglement polytopes) and algebraic complexity t...
Enhancing Accuracy of Quantum-Selected Configuration Interaction Calculations Using Multireference Perturbation Theory: Application to Aromatic Molecules
Soichi Shirai, Shih-Yen Tseng, Hokuto Iwakiri +3 more·Mar 28, 2025
Quantum-selected configuration interaction (QSCI) is a novel quantum-classical hybrid algorithm for quantum chemistry calculations. This method identifies electron configurations having large weights for the target state using quantum devices and all...