Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Entanglement distillation on symmetric two-qutrit entangled states of rank five
Zihua Song, Lin Chen, Yongge Wang·Sep 25, 2025
Entanglement distillation is a key step in quantum information, both theoretically and practically. It has been proven that non-positive-partial transpose (NPT) entangled states of rank at most four is 1-distillable under local operation and classica...
Observation of Discrete Time Quasicrystal in Rydberg Atomic Gases
Dong-Yang Zhu, Zheng-Yuan Zhang, Qi-Feng Wang +17 more·Sep 25, 2025
Discrete time quasicrystals (DTQC) constitute a class of non-equilibrium matter characterized by temporal order without strict periodicity, in contrast to conventional time crystals. Investigating these phenomena is essential for expanding our fundam...
Radiation of breathing vortex electron packets in magnetic field
G. V. Zmaga, G. K. Sizykh, D. V. Grosman +4 more·Sep 25, 2025
When a vortex electron with an orbital angular momentum (OAM) enters a magnetic field, its quantum state is described with a nonstationary Laguerre-Gaussian (NSLG) state rather than with a stationary Landau state. A key feature of these NSLG states i...
Optimal squeezing to minimize vulnerability to losses
Boulat Nougmanov·Sep 25, 2025
Non-Gaussian states, described by Wigner quasi-probability distribution taking negative values, are of great interest for various applications of quantum physics. It is known however that they are highly vulnerable to dissipation. In this paper, we s...
Limits to black-box amplification in QMA
Scott Aaronson, Phillip Harris, Freek Witteveen·Sep 25, 2025
We study the limitations of black-box amplification in the quantum complexity class QMA. Amplification is known to boost any inverse-polynomial gap between completeness and soundness to exponentially small error, and a recent result (Jeffery and Witt...
Path-Controlled Secure Network Coding
Masahide Sasaki, Te Sun Han, Mikio Fujiwara +3 more·Sep 25, 2025
Multicast for securely sharing confidential data among many users is becoming increasingly important. Currently, it relies on duplicate-and-forward routing and cryptographic methods based on computational security. However, these approaches neither a...
No Universal Purification in Quantum Mechanics
Zhenhuan Liu, Zhenyu Du, Zhenyu Cai +1 more·Sep 25, 2025
We prove that the linearity and positivity of quantum mechanics impose general restrictions on quantum purification, unveiling a new fundamental limitation of quantum information processing. In particular, no quantum operation can transform a finite ...
Harnessing optical disorder for Bell inequalities violation
Baptiste Courme, Malo Joly, Adrian Makowski +2 more·Sep 25, 2025
Bell inequalities are a cornerstone of quantum physics. By carefully selecting measurement bases (typically polarization), their violation certifies quantum entanglement. Such measurements are disrupted by the presence of optical disorder in propagat...
Tracking spin qubit frequency variations over 912 days
Kenji Capannelli, Brennan Undseth, Irene Fernández de Fuentes +9 more·Sep 25, 2025
Solid-state qubits are sensitive to their microscopic environment, causing the qubit properties to fluctuate on a wide range of timescales. The sub-Hz end of the spectrum is usually dealt with by repeated background calibrations, which bring consider...
Distillation of supersinglet states
Saeed Ahmad, Shuang Li, Jonathan Raghoonanan +3 more·Sep 25, 2025
We introduce an entanglement distillation (purification) protocol for supersinglet states composed of N qubits. The supersinglet state we target is a total spin zero state with zero spin variance, and has a fully entangled structure involving all qub...
Classical and quantum chaotic synchronization in coupled dissipative time crystals
Eliška Postavová, Gianluca Passarelli, Procolo Lucignano +1 more·Sep 25, 2025
We investigate the dynamics of two coherently coupled dissipative time crystals. In the classical mean-field limit of infinite spin length, we identify a regime of chaotic synchronization, marked by a positive largest Lyapunov exponent and a Pearson ...
Quantum Simulation and Energy Estimation for Discretized Anharmonic oscillator
Saurav Suman, Bikash K. Behera, Vivek Vyas +1 more·Sep 25, 2025
Anharmonic potential quantum system play crucial role in physics as they provide a more realistic description of oscillatory phenomena, which often deviate from the idealized harmonic model. However, simulating such system on classical computers is h...
Teleportation-based filtering for gravitational-wave detectors
Yohei Nishino·Sep 25, 2025
Employing the principle of quantum teleportation in gravitational-wave detectors provides a method to address technical challenges associated with implementing quantum filters for squeezed-light injection. A recent proposal has shown that an arbitrar...
PALQO: Physics-informed Model for Accelerating Large-scale Quantum Optimization
Yiming Huang, Yajie Hao, Jing Zhou +3 more·Sep 25, 2025
Variational quantum algorithms (VQAs) are leading strategies to reach practical utilities of near-term quantum devices. However, the no-cloning theorem in quantum mechanics precludes standard backpropagation, leading to prohibitive quantum resource c...
Squeezing codes: robust fluctuation-stabilized memories
Ethan Lake, Sunghan Ro·Sep 25, 2025
We introduce families of classical stochastic dynamics in two and higher dimensions which stabilize order in the absence of any symmetry. Our dynamics are qualitatively distinct from Toom's rule, and have the unusual feature of being fluctuation-stab...
Average-Case Complexity of Quantum Stabilizer Decoding
Andrey Boris Khesin, Jonathan Z. Lu, Alexander Poremba +2 more·Sep 25, 2025
Random classical linear codes are widely believed to be hard to decode. While slightly sub-exponential time algorithms exist when the coding rate vanishes sufficiently rapidly, all known algorithms at constant rate require exponential time. By contra...
Quantum Algorithm for Subcellular Multiscale Reaction-Diffusion Systems
Margot Lockwood, Nathan Wiebe, Connah Johnson +5 more·Sep 25, 2025
Computational modeling of cellular systems, where reactants are governed by biochemical equations and physical representations, requires extensive classical computing resources. These limitations significantly constrain the system size and spatiotemp...
Lower Bounds for Learning Hamiltonians from Time Evolution
Ziyun Chen, Jerry Li, Joseph Slote·Sep 25, 2025
Learning about a Hamiltonian $H$ from its time evolution $e^{-iHt}$ is a fundamental task in quantum science. A flurry of recent work has developed powerful new algorithms with provable guarantees for this task, for a variety of natural settings. Des...
A Review on Quantum Circuit Optimization using ZX-Calculus
Tobias Fischbach, Pierre Talbot, Pascal Bouvry·Sep 25, 2025
Quantum computing promises significant speed-ups for certain algorithms but the practical use of current noisy intermediate-scale quantum (NISQ) era computers remains limited by resources constraints (e.g., noise, qubits, gates, and circuit depth). Q...
Bridging Quantum Computing and Nuclear Structure: Atomic Nuclei on a Trapped-Ion Quantum Computer
Sota Yoshida, Takeshi Sato, Takumi Ogata +1 more·Sep 25, 2025
We demonstrate quantum simulations of strongly correlated nuclear many-body systems on the RIKEN-Quantinuum Reimei trapped-ion quantum computer, targeting ground states of oxygen, calcium, and nickel isotopes. By combining a hard-core-boson represent...