Papers
Frequency-Time Multiplexing for Near-Deterministic Generation of n-Photon Frequency-Bin States
Alex Fischer, Nathan T. Arnold, Colin P. Lualdi +5 more·Mar 3, 2026
One of the primary challenges of photonic quantum information processing is the on-demand preparation of multiple single-photon-level quantum states from probabilistic photon pair sources. Motivated by recent developments in frequency-bin-encoded pho...
Phase-space complexity of discrete-variable quantum states and operations
Siting Tang, Shunlong Luo, Matteo G. A. Paris·Mar 3, 2026
We introduce a quantifier of phase-space complexity for discrete-variable (DV) quantum systems. Motivated by a recent framework developed for continuous-variable systems, we construct a complexity measure of quantum states based on the Husimi Q-funct...
Quantum Theory of Functionally Graded Materials
Michael J. Landry, Ryotaro Okabe, Chuliang Fu +1 more·Mar 3, 2026
Functionally graded materials (FGMs) are composites whose composition or microstructure varies continuously in space, producing position-dependent mechanical and functional properties. In recent years, FGMs have gained significant attention due to ad...
Anomalous Klein tunnelling with magnetic barriers in strained graphene
Edgardo Marin-Colli, Tonatiuh Gómez-Ramírez, O-Excell Gutierrez +3 more·Mar 3, 2026
We study electron transport in a strained graphene sheet subjected to a sequence of $N$ electrostatic and magnetic barriers. Employing a modified and improved transfer-matrix framework, we examine how the transmission and reflection coefficients evol...
Simulating a quantum sensor: quantum state tomography of NV-spin systems
Alberto López-García, Aikaterini Vasilakou, Javier Cerrillo·Mar 3, 2026
We employ a quantum computer to simulate the effect of spin impurities on nitrogen-vacancy (NV) centers in diamond. As these defects operate as nanoscale quantum sensors, modeling quantum noise is crucial to identify limitations in precision. The ana...
Generation of 12 dB squeezed light from a waveguide optical parametric amplifier using a machine-learning-controlled spatial light modulator
Gyeongmin Ha, Kazuki Hirota, Takahiro Kashiwazaki +5 more·Mar 3, 2026
We demonstrate the generation of $12.1 \pm 0.2$ dB squeezed light from a periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA). While single-pass OPAs offer squeezed light with THz-order bandwidths, loss from spatial ...
Rate-Fidelity Tradeoffs in All-Photonic and Memory-Equipped Quantum Switches
Panagiotis Promponas, Leonardo Bacciottini, Paul Polakos +3 more·Mar 3, 2026
Quantum entanglement switches are a key building block for early quantum networks, and a central design question is whether near-term devices should use only flying photons or also incorporate quantum memories. We compare two architectures: an all-ph...
Human-Certified Module Repositories for the AI Age
Szilárd Enyedi·Mar 3, 2026
Human-Certified Module Repositories (HCMRs) are introduced in this work as a new architectural model for constructing trustworthy software in the era of AI-assisted development. As large language models increasingly participate in code generation, co...
Optimizing Orbital Parameters of Satellites for a Global Quantum Network
Athul Ashok, Owen DePoint, Jackson MacDonald +2 more·Mar 3, 2026
Due to fundamental limitations on terrestrial quantum links, satellites have received considerable attention for their potential as entanglement generation sources in a global quantum internet. In this work, we focus on the problem of designing a con...
High-Performance Quantum Frequency Conversion from Ultraviolet to Telecom Band
Yi Yang, Bin Wang, Ji-Chao Lin +10 more·Mar 2, 2026
Quantum frequency conversion (QFC) is essential for bridging the spectral gap between stationary qubits and low-loss optical communication channels. In this work, we demonstrate a short-wavelength-pumping QFC with the first-order quasi-phase matching...
Shaping frequency-tunable single photons for quantum networking in waveguide QED
Álvaro Pernas, Ricardo Puebla·Mar 2, 2026
The exchange of quantum information among nodes in a quantum network is one of the main challenges in modern technologies. Superconducting waveguide QED networks hold great potential for realizing distributed quantum computation, where distinct nodes...
Intermodal entanglement in a quantum optical model of HHG due to the back-action on the driving field
Ákos Gombkötő, Péter Ádám, David Theidel +1 more·Mar 1, 2026
Preparation of nonclassical light with special quantum properties is essential for quantum technologies. High-harmonic generation (HHG) is a process which not only enables the creation of attosecond pulses but also has the potential to generate light...
On Utility-optimal Entanglement Routing in Quantum Networks
Sounak Kar, Arpan Mukhopadhyay·Mar 1, 2026
Quantum networks are envisioned to enable reliable distribution and manipulation of quantum information across distances, forming the foundation of a future quantum internet. The fair and efficient allocation of communication resources in such networ...
Topology as a Design Variable for Multiproperty Engineering in Synthesized 4-5-6-8 Carbon Nanoribbons
Djardiel da S. Gomes, Isaac M. Felix, Lucas L. Lage +3 more·Feb 27, 2026
Nonbenzenoid carbon frameworks expand low-dimensional material design via controlled asymmetry. Here, we show the experimentally realized 4-5-6-8 carbon nanoribbon establishes a topology-driven paradigm for multiproperty engineering, not just a graph...
Scaling Quantum Machine Learning without Tricks: High-Resolution and Diverse Image Generation
Jonas Jäger, Florian J. Kiwit, Carlos A. Riofrío·Feb 27, 2026
Quantum generative modeling is a rapidly evolving discipline at the intersection of quantum computing and machine learning. Contemporary quantum machine learning is generally limited to toy examples or heavily restricted datasets with few elements. T...
Asymptotically Solvable Quantum Circuits
Samuel H. Pickering, Bruno Bertini·Feb 27, 2026
The discovery of chaotic quantum circuits with (partially) solvable dynamics has played a key role in our understanding of non-equilibrium quantum matter and, at the same time, has helped the development of concrete platforms for quantum computation....
Gaussian resource based heralded entangled state generation enhanced by photon addition and subtraction
Yun-Long Cao, Xiao-Ye Xu, Chuan-Feng Li +1 more·Feb 27, 2026
We propose a heralded entanglement generation scheme based on Gaussian sources augmented with photon addition and subtraction operations. By combining single-mode squeezing, linear interferometers, and conditional photon-number measurements on ancill...
Saturable nonlinearities in a driven-dissipative bosonic quantum battery
João P. R. Leonel, Paulo A. Brandão·Feb 27, 2026
We investigate the charging of a nonlinear quantum battery consisting of a single bosonic mode subject to a saturable nonlinearity, coherent driving, and dissipation. In contrast to Kerr-type anharmonicities, the saturable interaction induces a bound...
Entanglement dynamics for atoms near a reflecting boundary: enhancement and suppression by environment-induced interactions
Ying Chen, Hongwei Yu, Jiawei Hu·Feb 27, 2026
We investigate how environment-induced interactions influence the entanglement dynamics of two static atoms placed near a perfectly reflecting boundary. In this setting, the environment-induced interactions include both atom-boundary contributions (p...
Q-Tag: Watermarking Quantum Circuit Generative Models
Yang Yang, Yuzhu Long, Han Fang +4 more·Feb 26, 2026
Quantum cloud platforms have become the most widely adopted and mainstream approach for accessing quantum computing resources, due to the scarcity and operational complexity of quantum hardware. In this service-oriented paradigm, quantum circuits, wh...