Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Deterministic randomness extraction for quantum random number generation with partial trust
Pablo Tikas Pueyo, Tomás Fernández Martos, Gabriel Senno·Dec 9, 2025
It is a well-known fact in classical information theory that no deterministic procedure can extract close-to-ideal randomness from an arbitrary entropy source. On the other hand, if additional knowledge about the source is available -- e.g., that it ...
Perfect continuous-variable quantum microcombs
Kangkang Li, Yue Wang, Ze Wang +7 more·Dec 9, 2025
Quantum microcombs generated in high-Q microresonators provide compact, multiplexed sources of entangled modes for continuous-variable (CV) quantum information processing. While deterministic generation of CV states via Kerr-induced two-mode squeezin...
Parity erasure: a foundational principle for indefinite causal order
Zixuan Liu, Ognyan Oreshkov·Dec 9, 2025
Processes with indefinite causal order can arise when quantum theory is locally valid and they allow accomplishing new informational tasks. Despite recent progress, the correlations allowed in such processes have not been clearly understood. Here, we...
Quantum simulation in the entanglement picture
D. -S. Wang, X. Xu, Y. -D. Liu·Dec 9, 2025
The notion of ``picture'' is fundamental in quantum mechanics. In this work, a new picture, which we call entanglement picture, is proposed based on the novel channel-state duality, whose importance is revealed in quantum information science. We illu...
Tunable passive squeezing of squeezed light through unbalanced double homodyne detection
Niels Tripier-Mondancin, David Barral, Ganaël Roeland +3 more·Dec 9, 2025
The full characterization of quantum states of light is a central task in quantum optics and information science. Double homodyne detection provides a powerful method for the direct measurement of the Husimi Q quasi-probability distribution, offering...
Heralded generation of a three-mode NOON state
Sukhjit P. Singh, Elnaz Bazzazi, Diego N. Bernal-García +8 more·Dec 9, 2025
Entangled states of photons form the foundation of quantum communication, computation, and metrology. Yet their generation remains fundamentally constrained: in the absence of intrinsic photon-photon interactions, the generation of such states is inh...
The utility of noiseless linear amplification and attenuation in single-rail discrete-variable quantum communications
Ozlem Erkilic, Aritra Das, Angela A. Baiju +3 more·Dec 9, 2025
Quantum communication offers many applications, with teleportation and superdense coding being two of the most fundamental. In these protocols, pre-shared entanglement enables either the faithful transfer of quantum states or the transmission of more...
Large-scale Lindblad learning from time-series data
Ewout van den Berg, Brad Mitchell, Ken Xuan Wei +1 more·Dec 9, 2025
In this work, we develop a protocol for learning a time-independent Lindblad model for operations that can be applied repeatedly on a quantum computer. The protocol is highly scalable for models with local interactions and is in principle insensitive...
Deterministic Equations for Feedback Control of Open Quantum Systems II: Properties of the memory function
Alberto J. B. Rosal, Patrick P. Potts, Gabriel T. Landi·Dec 8, 2025
Feedback uses past detection outcomes to dynamically modify a quantum system and is central to quantum control. These outcomes can be stored in a memory, defined as a stochastic function of past measurements. In this work, we investigate the main pro...
Observation of a Topological Berry Phase with a Single Phonon in an Ion Microtrap Array
Justin F. Niedermeyer, Nathan K. Lysne, Katherine C. McCormick +11 more·Dec 8, 2025
Controlled quantum mechanical motion of trapped atomic ions can be used to simulate and explore collective quantum phenomena and to process quantum information. Groups of cold atomic ions in an externally applied trapping potential self-organize into...
Information-Theoretic Analysis of Weak Measurements and Their Reversal
Luis D. Zambrano Palma, Yusef Maleki, M. Suhail Zubairy·Dec 8, 2025
We study trade-off relations in information extraction from quantum systems subject to null-result weak measurements, where the absence of a detected photon continuously updates the system state. We present a detailed analysis of qubit and qutrit sys...
Comparing quantum channels using Hermitian-preserving trace-preserving linear maps: A physically meaningful approach
Arindam Mitra, Jatin Ghai·Dec 8, 2025
In quantum technologies, quantum channels are essential elements for the transmission of quantum states. The action of a quantum channel usually introduces noise in the quantum state and thereby reduces the information contained in it. These are math...
A Framework for Data Valuation and Monetisation
Eduardo Vyhmeister, Bastien Pietropaoli, UdoBub +2 more·Dec 8, 2025
As organisations increasingly recognise data as a strategic resource, they face the challenge of translating informational assets into measurable business value. Existing valuation approaches remain fragmented, often separating economic, governance, ...
Quantum Diamond Microscopy for Non-Destructive Failure Analysis of an Integrated Fan-Out Package-on-Package iPhone Chip
Bartu Bisgin, Marwa Garsi, Andreas Welscher +2 more·Dec 8, 2025
The increasing complexity of advanced semiconductor packages, driven by chiplet architectures and 2.5D/3D integration, challenges conventional failure localization methods such as lock-in thermography (LIT) and complicates current Failure Analysis (F...
On-Demand Microwave Single-Photon Source Based on Tantalum Thin Film
Ying Hu, Sheng-Yong Li, En-Qi Chen +4 more·Dec 8, 2025
Single-photon sources are crucial for quantum information technologies. Here, we demonstrate a microwave single-photon source fabricated using a tantalum-based thin film, whose favorable material properties enable high-quality and stable photon emiss...
Exponentially accelerated relaxation and quantum Mpemba effect in open quantum systems
Emerson Lima Caldas, Diego Paiva Pires·Dec 8, 2025
We investigate the quantum Mpemba effect in the relaxation of open quantum systems whose effective dynamics is described by Davies maps. We present a class of unitary transformations built from permutation matrices that, when applied to the initial s...
RuleSet Generation Framework for Application Layer Integration in Quantum Internet
Rei Kawano, Shin Nishio, Hideaki Kawaguchi +2 more·Dec 8, 2025
Layered architectures for the Quantum Internet have been proposed, inspired by that of the classical Internet, which has demonstrated high maintainability even in large-scale systems. While lower layers in the Quantum Internet, such as entanglement g...
Local Reversibility and Divergent Markov Length in 1+1-D Directed Percolation
Yu-Hsueh Chen, Tarun Grover·Dec 8, 2025
Recent progress in open many-body quantum systems has highlighted the importance of the Markov length, the characteristic scale over which conditional correlations decay. It has been proposed that non-equilibrium phases of matter can be defined as eq...
Optimal Transport of a Free Quantum Particle and its Shape Space Interpretation
Bernadette Lessel·Dec 7, 2025
A solution of the free Schrödinger equation is investigated by means of Optimal transport. The curve of probability measures $μ_t$ this solution defines is shown to be an absolutely continuous curve in the Wasserstein space $W_2(\mathbb{R}^3)$. The o...
Non-Orthogonal Multiple Access-Based Continuous-Variable Quantum Key Distribution: Secret Key Rate Analysis and Power Allocation
Zhichao Dong, Xiaolin Zhou, Huang Peng +3 more·Dec 7, 2025
We address the multi-user quantum key distribution (QKD) problem under malicious quantum attacks, which is critical for realizing a large-scale quantum Internet. This paper maximizes the sum secret key rate (SKR) of a novel uplink non-orthogonal mult...