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Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Lectures on Quantum Field Theory on a Quantum Computer
Aninda Sinha, Ujjwal Basumatary·Dec 2, 2025
The lecture notes cover the basics of quantum computing methods for quantum field theory applications. No detailed knowledge of either quantum computing or quantum field theory is assumed and we have attempted to keep the material at a pedagogical le...
Multi-node quantum key distribution network using existing underground optical fibre infrastructure
Mariella Minder, Andreas Siakolas, Stephanos Yerolatsitis +2 more·Dec 2, 2025
Quantum key distribution (QKD) offers unconditional information security by allowing two distant users to establish a common encryption key resilient to hacking. Resultingly, QKD networks interconnecting critical infrastructure and enabling the secur...
Rational regulation strategies of interstitial localized electrons in electride: A density functional theory study
L. Zhang, D. Wang, H. Wang +4 more·Dec 2, 2025
As a class of electron-rich materials, electrides demonstrate promising applications in many fields. However, the required high pressure restricts the practical applications to some extent. This study reveals that the unique feature of electride, i.e...
Efficient Simulation of the 2D Hubbard Model via Hilbert Space-Filling Curve Mapping
Ashkan Abedi, Vittorio Giovannetti, Dario De Santis·Dec 2, 2025
We investigate tensor network simulations of the two-dimensional Hubbard model by mapping the lattice onto a one-dimensional chain using space-filling curves. In particular, we focus on the Hilbert curve, whose locality-preserving structure minimizes...
Chiplet technology for large-scale trapped-ion quantum processors
Bassem Badawi, Philip C. Holz, Michael Raffetseder +6 more·Dec 2, 2025
Trapped ions are among the most promising platforms for realizing a large-scale quantum information processor. Current progress focuses on integrating optical and electronic components into microfabricated ion traps to allow scaling to large numbers ...
High-harmonic generation from two weakly coupled molecules: a simple tight-binding model
Lina Bielke, Samuel Schöpa, Falk-Erik Wiechmann +2 more·Dec 2, 2025
The generation of high harmonics is a strongly nonlinear effect that allows to probe properties of the target and to study electron dynamics in matter. It has been investigated in many different kinds of targets, including molecular gases, liquids an...
Quantum LLMs Using Quantum Computing to Analyze and Process Semantic Information
Timo Aukusti Laine·Dec 2, 2025
We present a quantum computing approach to analyzing Large Language Model (LLM) embeddings, leveraging complex-valued representations and modeling semantic relationships using quantum mechanical principles. By establishing a direct mapping between LL...
A unified optical platform for non-Gaussian and fault-tolerant Gottesman-Kitaev-Preskill states
Ozlem Erkilic, Aritra Das, Biveen Shajilal +3 more·Dec 2, 2025
Quantum technologies, encompassing communication, computation, and metrology, rely on the generation and control of non-Gaussian states of light. These states enable secure quantum communication, fault-tolerant quantum computation, and precision sens...
Constraint-Optimal Driven Allocation for Scalable QEC Decoder Scheduling
Dongmin Kim, Jeonggeun Seo, Yongtae Kim +1 more·Dec 2, 2025
Fault-tolerant quantum computing (FTQC) requires fast and accurate decoding of Quantum Error Correction (QEC) syndromes. However, in large-scale systems, the number of available decoders is much smaller than the number of logical qubits, leading to a...
Full-counting statistics and quantum information of dispersive readout with a squeezed environment
Ming Li, JunYan Luo, Gloria Platero +1 more·Dec 2, 2025
Motivated by the importance of dispersive readout in quantum technology, we study a prototypical dispersive readout setup that is probed by a squeezed vacuum in a time-reversal-symmetric fashion. To this end, we develop a full-counting-statistics fra...
Detection of photon-level signals embedded in sunlight with an atomic photodetector
Laura Zarraoa, Tomas Lamich, Sondos Elsehimy +2 more·Dec 2, 2025
The detection of few-photon signals in a broadband background is an extreme challenge for photon counting, requiring filtering that accepts a narrow range of optical frequencies while strongly rejecting all others. Recent work [Zarraoa et. al, Phys. ...
Improved Ising Meson Spectroscopy Simulation on a Noisy Digital Quantum Device
Hao-Ti Hung, Isabel Nha Minh Le, Johannes Knolle +1 more·Dec 2, 2025
The transverse-field Ising model serves as a paradigm for studying confinement and excitation spectra, particularly the emergence of $E_8$ symmetry near criticality. However, experimentally resolving the Ising meson spectroscopy required to verify th...
Superchannel without Tears: A Generalized Occam's Razor for Quantum Processes
Yunlong Xiao·Dec 2, 2025
Quantum channels function as the operational primitives of quantum theory, while superchannels describe the most general transformations acting upon them. Yet the prevailing framework for superchannels is both internally inconsistent, owing to the co...
Qudits offer no advantages over dits for sending random messages
Ronit Shah·Dec 2, 2025
We consider the following simple scenario: Alice has one of many possible messages, drawn from a known distribution, and wants to maximize the probability that Bob guesses her message correctly. We prove that if Alice can send only a qudit to Bob, wi...
Quantum-Based Self-Attention Mechanism for Hardware-Aware Differentiable Quantum Architecture Search
Yuxiang Liu, Sixuan Li, Fanxu Meng +2 more·Dec 2, 2025
The automated design of parameterized quantum circuits for variational algorithms in the NISQ era faces a fundamental limitation, as conventional differentiable architecture search relies on classical models that fail to adequately represent quantum ...
Su-Schrieffer-Heeger model driven by sequences of two unitaries: periodic, quasiperiodic and random protocols
Maitri Ganguli, Diptiman Sen·Dec 2, 2025
We study the effect of driving the Su-Schrieffer-Heeger model using two unitary operators $U_1$ and $U_2$ in different combinations; the unitaries differ in the values of the inter-cell hopping amplitudes. Specifically, we study the cases where the u...
Quantum feature encoding optimization
Tommaso Fioravanti, Brian Quanz, Gabriele Agliardi +3 more·Dec 2, 2025
Quantum Machine Learning (QML) holds the promise of enhancing machine learning modeling in terms of both complexity and accuracy. A key challenge in this domain is the encoding of input data, which plays a pivotal role in determining the performance ...
Quantum Coulomb drag signatures of Majorana bound states
Zi-Wei Li, Jiaojiao Chen, Wei Xiong +2 more·Dec 2, 2025
Majorana bound states (MBSs), with their non-Abelian statistics and topological protection, are key candidates for fault-tolerant quantum computation. However, their unambiguous identification in solid-state systems remains a fundamental challenge. H...
A portable LED-based diamond magnetometer for outreach and teaching labs
Hollis Williams, Alex Newman, Stuart Graham +2 more·Dec 2, 2025
We present a compact, low-cost version of an NV center diamond magnetometer which replaces the standard green laser with a high-power LED. This modification improves safety, reduces cost, and allows the green excitation and red photoluminescence to b...
Estimating Local Observables via Cluster-Level Light-Cone Decomposition
Junxiang Huang, Yunxin Tang, Xiao Yuan·Dec 2, 2025
Simulating large quantum circuits on hardware with limited qubit counts is often attempted through methods like circuit knitting, which typically incur sample costs that grow exponentially with the number of connections cut. In this work, we introduc...