Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
How Entanglement Reshapes the Geometry of Quantum Differential Privacy
Xi Wang, Parastoo Sadeghi, Guodong Shi·Jan 27, 2026
Quantum differential privacy provides a rigorous framework for quantifying privacy guarantees in quantum information processing. While classical correlations are typically regarded as adversarial to privacy, the role of their quantum analogue, entang...
Introduction to Quantum Entanglement Geometry
Kazuki Ikeda·Jan 27, 2026
This article is an expository account aimed at viewing entanglement in finite-dimensional quantum many-body systems as a phenomenon of global geometry. While the mathematics of general quantum states has been studied extensively, this article focuses...
Mismatch in the Inverse-Squeezing Kennedy Receiver for Binary Displaced Squeezed-State Discrimination
Enhao Bai, Tianyi Wu, Huankai Zhang +7 more·Jan 27, 2026
We analyze mismatch in the inverse-squeezing Kennedy receiver for binary displaced squeezed vacuum state discrimination. Mismatch is shown to be equivalent to a residual squeezing after nulling, which modifies the output photon-number statistics and ...
C2NP: A Benchmark for Learning Scale-Dependent Geometric Invariances in 3D Materials Generation
Can Polat, Erchin Serpedin, Mustafa Kurban +1 more·Jan 27, 2026
Generative models for materials have achieved strong performance on periodic bulk crystals, yet their ability to generalize across scale transitions to finite nanostructures remains largely untested. We introduce Crystal-to-Nanoparticle (C2NP), a sys...
The cost of quantum algorithms for biochemistry: A case study in metaphosphate hydrolysis
Ryan LaRose, Antonios M. Alvertis, Alan Bidart +10 more·Jan 27, 2026
We evaluate the quantum resource requirements for ATP/metaphosphate hydrolysis, one of the most important reactions in all of biology with implications for metabolism, cellular signaling, and cancer therapeutics. In particular, we consider three algo...
Time-series based quantum state discrimination
Samuel Jung, Neel Vora, Akel Hashim +2 more·Jan 27, 2026
Accurate quantum state readout is crucial for error correction and algorithms, but measurement errors are detrimental. Readout fidelity is typically limited by a poor signal-to-noise ratio (SNR) and energy relaxation ($T_1$ decay), a significant prob...
Frequency- and time-resolved second order quantum coherence function of IDTBT single-molecule fluorescence
Quanwei Li, Yuping Shi, Lam Lam +2 more·Jan 26, 2026
The frequency- and time-resolved second order quantum coherence function (g(2)(τ)) of single-molecule fluorescence has recently been proposed as a powerful new quantum light spectroscopy that can reveal intrinsic quantum coherence in excitation energ...
Qubit-qudit entanglement transfer in defect centers with high-spin nuclei
W. -R. Hannes, Guido Burkard·Jan 26, 2026
We propose a scheme for accumulating entanglement between long-lived qudits provided by central nuclear spins of defect centers. Assuming a generic setting, the electron spin of each node acts as the communication qubit and may be entangled with othe...
When Does Adaptation Win? Scaling Laws for Meta-Learning in Quantum Control
Nima Leclerc, Chris Miller, Nicholas Brawand·Jan 26, 2026
Quantum hardware suffers from intrinsic device heterogeneity and environmental drift, forcing practitioners to choose between suboptimal non-adaptive controllers or costly per-device recalibration. We derive a scaling law lower bound for meta-learnin...
Sedentary quantum walks on bipartite graphs
Karen Meagher, Hermie Monterde·Jan 26, 2026
If a quantum walk starting on a vertex tends to stay at home, then that vertex is said to be sedentary. We prove that almost all planar graphs and almost all trees contain at least two sedentary vertices for any assignment of edge weights -- a result...
Private Proofs of When and Where
Uma Girish, Greg Gluch, Shafi Goldwasser +3 more·Jan 26, 2026
Position verification schemes are interactive protocols where entities prove their physical location to others; this enables interactive proofs for statements of the form "I am at a location $L$." Although secure position verification cannot be achie...
Quantum capacity analysis of finite-dimensional lossy channels
Sofia Cocciaretto, Vittorio Giovannetti·Jan 26, 2026
Traditionally, Quantum Information, and Quantum Communication specifically, have been focused on qubit-based architectures. Recent results, however, highlighted that higher dimensional architectures (qudit-based) may present advantages both in terms ...
Reinforcement Learning for Quantum Technology
Marin Bukov, Florian Marquardt·Jan 26, 2026
Many challenges arising in Quantum Technology can be successfully addressed using a set of machine learning algorithms collectively known as reinforcement learning (RL), based on adaptive decision-making through interaction with the quantum device. A...
Krylov's State Complexity and Information Geometry in Qubit Dynamics
Carlo Cafaro, Emma Clements, Vishnu Vardhan Anuboyina·Jan 26, 2026
We compare Krylov's state complexity with an information-geometric (IG) measure of complexity for the quantum evolution of two-level systems. Focusing on qubit dynamics on the Bloch sphere, we analyze evolutions generated by stationary and nonstation...
Complete transparency with three active-passive-coupled optical resonators
Xiao-Bo Yan, Liu Yang, Bing He·Jan 26, 2026
The phenomena of induced transparency, with the typical examples of electromagnetically induced transparency (EIT) in atomic media and those based on coupled optical resonators, have attracted tremendous interest since their discoveries. Owing to the...
Stacked quantum Ising systems and quantum Ashkin-Teller model
Davide Rossini, Ettore Vicari·Jan 26, 2026
We analyze the quantum states of an isolated composite system consisting of two stacked quantum Ising (SQI) subsystems, coupled by a local Hamiltonian term that preserves the $Z_2$ symmetry of each subsystem. The coupling strength is controlled by an...
Fault-tolerant quantum simulation of the Pauli-Breit Hamiltonian for ab initio hybrid quantum-classical molecular design with applications to photodynamic therapy
Emil Zak·Jan 26, 2026
Relativistic spin effects drive subtle molecular phenomena ranging from intersystem crossing in photodynamic therapy to spin-mediated catalysis and high-resolution spectroscopy. These effects are described by the Pauli-Breit Hamiltonian, which extend...
Dissipative diffusion in quantum state preparation: from passive cooling to system-bath engineering
Tim Pokart, Lukas König, Sebastian Diehl +1 more·Jan 26, 2026
We investigate and compare two particle number conserving protocols for the preparation of a topologically nontrivial state. The first is derived from thermally coupling the system to a cold bath, while the second is based on engineered dissipation. ...
Multivariate Multicycle Codes for Complete Single-Shot Decoding
Feroz Ahmed Mian, Owen Gwilliam, Stefan Krastanov·Jan 26, 2026
We introduce multivariate multicycle (MM) codes, a new family of quantum error correcting codes that unifies and generalizes bivariate bicycle codes, multivariate bicycle codes, abelian two-block group algebra codes, generalized bicycle codes, trivar...
Experimental Demonstration of Commutation Relations Using Intensity Correlations
Hans Dang, Sebastian Luff, Martin Fischer +4 more·Jan 26, 2026
The canonical commutation relation is a cornerstone of quantum theory and underlies the Heisenberg uncertainty principle. Although uncertainty relations have been extensively tested, direct verifications of the underlying commutation relation itself ...