Tootfinder

Behind the scenes of the Quantum Extreme Learning Machines
A. De Lorenzis, M. P. Casado, N. Lo Gullo, T. Lux, F. Plastina, A. Riera
https://arxiv.org/abs/2509.06873 https://

Behind the scenes of the Quantum Extreme Learning Machines
In recent years, Quantum Machine Learning (QML) has grown rapidly, emerging as a promising approach to make quantum computing implementation competitive. In this work, we investigate Quantum Extreme Learning Machines (QELM), a quantum variant of Extreme Learning Machines where training is restricted to the output layer. The proposed architecture combines dimensionality reduction (via PCA or Autoencoders), quantum state encoding, evolution under an XX Hamiltonian, and measurement, providing feat…

Access Control Threatened by Quantum Entanglement
Zhicheng Zhang, Mingsheng Ying
https://arxiv.org/abs/2507.02622 https://arxiv.org/p…

Access Control Threatened by Quantum Entanglement
Access control is a cornerstone of computer security that prevents unauthorised access to resources. In this paper, we study access control in quantum computer systems. We present the first explicit scenario of a security breach when a classically secure access control system is straightforwardly adapted to the quantum setting. The breach is ultimately due to that quantum mechanics allows the phenomenon of entanglement and violates Mermin inequality, a multi-party variant of the celebrated Bell…

Harnessing Topological Valley-Hall States in Photonic Crystals for Robust Cancer Cell Detection
Junayet Hossain, Sajid Muhaimin Choudhury, Mohammed Imamul Hassan Bhuiyan
https://arxiv.org/abs/2509.05690

Harnessing Topological Valley-Hall States in Photonic Crystals for Robust Cancer Cell Detection
Topological photonic crystals (TPhCs) are the photonic analogs of topological insulators, inspired by the quantum Hall effect and its variants, including the integer, spin, and valley Hall effects. Among these, valley-hall photonic crystals (VPhCs) achieve topological protection by breaking inversion symmetry, making them closely related to valleytronics. Like other TPhCs, VPhCs enable robust, backscattering-free light propagation, even in the presence of structural imperfections, sharp bends, …

Spinon Singlet: Microscopic Mechanism of $d$-Wave Pairing in a Partially-Filled Stripe
Jia-Long Wang, Shi-Jie Hu, Xue-Feng Zhang
https://arxiv.org/abs/2507.18892 https://…

Spinon Singlet: Microscopic Mechanism of $d$-Wave Pairing in a Partially-Filled Stripe
Significant research advances have led to a consensus that the Fermi-Hubbard model and its extended variants are archetypal frameworks for elucidating the intertwined relationship between stripe orders and superconductivity in hole-doped high-$T_c$ materials. Notably, the Hubbard quantum simulator has recently achieved several remarkable breakthroughs, e.g., being successfully cooled down to the cryogenic regime and enabling the observation of stable fluctuating stripes. However, the microscopi…

Quantifying mixed-state entanglement via partial transpose and realignment moments
Poetri Sonya Tarabunga, Tobias Haug
https://arxiv.org/abs/2507.13840 htt…

Quantifying mixed-state entanglement via partial transpose and realignment moments
Entanglement plays a crucial role in quantum information science and many-body physics, yet quantifying it in mixed quantum many-body systems has remained a notoriously difficult problem. Here, we introduce families of quantitative entanglement witnesses, constructed from partial transpose and realignment moments, which provide rigorous bounds on entanglement monotones. Our witnesses can be efficiently measured using SWAP tests or variants of Bell measurements, thus making them directly impleme…