Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantifying classical and quantum bounds for resolving closely spaced, non-interacting, simultaneously emitting dipole sources in optical microscopy
Armine I. Dingilian, Aarnah Kurella, Cheyenne S. Mitchell +3 more·Dec 11, 2025
Recent theoretical and experimental work has shown that the quantum Fisher information associated with estimating the separation between two optical point sources remains finite at small separations, effectively opening new routes to super-resolution...
ENTCALC: Toolkit for calculating geometric entanglement in multipartite quantum systems
Piotr Masajada, Aby Philip, Alexander Streltsov·Dec 11, 2025
We present entcalc, a Python and MATLAB package for estimating the geometric entanglement of multipartite quantum states. The package operates as follows: given a multipartite quantum state as input, it outputs an estimate of its geometric entangleme...
Multiple-time Quantum Imaginary Time Evolution
Julio Del Castillo, Mats Granath, Evert van Nieuwenburg·Dec 11, 2025
Quantum Imaginary-Time Evolution (QITE) is a powerful method for preparing ground states on quantum hardware. However, executing QITE has costly measurement budgets for general Hamiltonians. Both fidelity and computational cost are strongly dependent...
Optimized Measurement Schedules for the Surface Code with Dropout
Benjamin Anker, Dripto M. Debroy·Dec 11, 2025
Recent work has shown that fabrication defects can be well-handled using a strategy relying on the mid-error-correction-cycle state. In this work we present two improvements to the original prescription. First, we quantify the impact of the choice of...
Metrics on completely positive maps via noncommutative geometry
Are Austad, Erik Bédos, Jonas Eidesen +2 more·Dec 11, 2025
We study methods of inducing metrics on unital completely positive maps by employing seminorms arising in noncommutative geometry. Our main approach relies on the development of an infinite-dimensional $C^*$-algebraic analogue of the Choi-Jamiołkowsk...
Generative Adversarial Variational Quantum Kolmogorov-Arnold Network
Hikaru Wakaura·Dec 11, 2025
Kolmogorov Arnold Networks is a novel multilayer neuromorphic network that can exhibit higher accuracy than a neural network. It can learn and predict more accurately than neural networks with a smaller number of parameters, and many research groups ...
Estimating Detector Error Models on Google's Willow
Kregg Elliot Arms, Martin James McHugh, Joseph Edward Nyhan +2 more·Dec 11, 2025
We consolidate recent theoretical advances in Detector Error Model (DEM) estimation and formalize several algorithms to learn DEM parameters and structure from syndromes without using a decoder, demonstrating recovery of known DEMs from simulated syn...
Quantum Approaches to Urban Logistics: From Core QAOA to Clustered Scalability
F. Picariello, G. Turati, R. Antonelli +10 more·Dec 11, 2025
The Traveling Salesman Problem (TSP) is a fundamental challenge in combinatorial optimization, widely applied in logistics and transportation. As the size of TSP instances grows, traditional algorithms often struggle to produce high-quality solutions...
Complexity and multi-functional variants of the Quantum-to-Quantum Bernoulli Factories
Francesco Hoch, Taira Giordani, Gonzalo Carvacho +2 more·Dec 11, 2025
A Bernoulli factory is a model for randomness manipulation that transforms an initial Bernoulli random variable into another Bernoulli variable by applying a predetermined function relating the output bias to the input one. In literature, quantum-to-...
Phase structure of the one-dimensional $\mathbb{Z}_2$ lattice gauge theory with second nearest-neighbor interactions
Yeimer Zambrano, Aleksey Alekseev, Konrad J. Kapcia +2 more·Dec 11, 2025
We investigate the ground-state phase diagram of a one-dimensional $\mathbb{Z}_2$ lattice gauge theory (LGT) model with hard-core bosons at half-filling, extending previous studies by including second nearest-neighbor (2NN) interactions. Using matrix...
Understanding Surface-Induced Decoherence of NV Centers in Diamond
Jonah Nagura, Mykyta Onizhuk, Giulia Galli·Dec 11, 2025
Nitrogen vacancy centers (NV) in proximity to diamond surfaces are promising nanoscale quantum sensors. However, their coherence properties are negatively affected by magnetic and electric surface noise, whose origin and detailed impact have remained...
Further Statistical Study of NISQ Experiments
Gil Kalai, Tomer Shoham, Carsten Voelkmann·Dec 11, 2025
We revisit and extend some topics that we studied in our previous works (Rinott, Kalai and Shoham 2022; Kalai, Rinott and Shoham, 2023,2024) regarding the Google 2019 "quantum supremacy" experiment. We extend our analysis of the prediction based on G...
Scalable Optical Links for Controlling Bosonic Quantum Processors
Chuanlong Ma, Jia-Qi Wang, Linze Li +13 more·Dec 11, 2025
Superconducting quantum computing has the potential to revolutionize computational capabilities. However, scaling up large quantum processors is limited by the cumbersome and heat-conductive electronic cables that connect room-temperature control ele...
Sub-Bath Cooling in Bosonic Systems: Gaussian Constraints and Non-Gaussian Enhancements
Wen-Han Png, Xueyuan Hu, Valerio Scarani·Dec 11, 2025
Cooling quantum systems with finite resources is a central task in quantum technologies and has been extensively explored in discrete-variable settings. As continuous-variable (CV) platforms play an increasingly important role in quantum information ...
Advantage in distributed quantum computing with slow interconnects
Evan E Dobbs, Nicolas Delfosse, Aharon Brodutch·Dec 11, 2025
The main bottleneck for distributed quantum computing is the rate at which entanglement is produced between quantum processing units (QPUs). In this work, we prove that multiple QPUs connected through slow interconnects can outperform a monolithic ar...
A Cryogenic Muon Tagging System Based on Kinetic Inductance Detectors for Superconducting Quantum Processors
Ambra Mariani, Laura Cardani, Mustafa Bal +16 more·Dec 11, 2025
Ionizing radiation has emerged as a potential limiting factor for superconducting quantum processors, inducing quasiparticle bursts and correlated errors that challenge fault-tolerant operation. Atmospheric muons are particularly problematic due to t...
Pulsed learning for quantum data re-uploading models
Ignacio B. Acedo, Pablo Rodriguez-Grasa, Pablo Garcia-Azorin +1 more·Dec 11, 2025
While Quantum Machine Learning (QML) holds great potential, its practical realization on Noisy Intermediate-Scale Quantum (NISQ) hardware has been hindered by the limitations of variational quantum circuits (VQCs). Recent evidence suggests that VQCs ...
A Proof of Success and Reward Distribution Protocol for Multi-bridge Architecture in Cross-chain Communication
Damilare Peter Oyinloye, Mohd Sameen Chishti, Jingyue Li·Dec 11, 2025
Single-bridge blockchain solutions enable cross-chain communication. However, they are associated with centralization and single-point-of-failure risks. This paper proposes Proof of Success and Reward Distribution (PSCRD), a novel multi-bridge respon...
All-photonic entanglement swapping with remote quantum dots
Mattia Beccaceci, Giuseppe Ronco, Fabrizio Cienzo +16 more·Dec 11, 2025
Entanglement swapping is a protocol that details how to create entanglement between previously uncorrelated particles. Its all-photonic version - mediated by the interference of photon pairs generated by separate quantum systems-finds disparate appli...
Efficient simulation of low-entanglement bosonic Gaussian states in polynomial time
Tong Liu, Hui-Ke Jin, Tao Xiang +1 more·Dec 11, 2025
Bosonic Gaussian states appear ubiquitously in quantum optics and condensed matter physics but remain difficult to simulate classically due to the hafnian bottleneck. We present an efficient algorithm that converts pure bosonic Gaussian states into m...