Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
N-Cavity-Magnon Polariton Blockade via Kerr Nonlinearity
Zhe-Qi Yang, Xiao-Yu Bi, Zhi-Rong Zhong·Mar 17, 2026
We theoretically propose a scheme to realize a $n$-cavity-magnon polariton blockade in a cavity-magnon system by utilizing the Kerr nonlinearity. Cavity-magnon polaritons are hybrid quasiparticles formed by the strong coupling between cavity photons ...
3D tomography of exchange phase in a Si/SiGe quantum dot device
Dylan Albrecht, Sarah Thompson, N. Tobias Jacobson +1 more·Mar 17, 2026
The exchange interaction is a foundational building block for the operation of spin-based quantum processors. Extracting the exchange interaction coefficient $J(\mathbf{V})$, as a function of gate electrode voltages, is important for understanding di...
Simultaneous amplitude and phase spectroscopy using two-photon interference
Kyle M. Jordan, Yingwen Zhang, Frédéric Bouchard +5 more·Mar 16, 2026
Quantum spectroscopy seeks to probe chemical systems using nonclassical light, which has properties that are qualitatively and quantitatively different than conventional light sources. One promising technique uses intensity-correlated twin beams of l...
Programmable pixel-mode linear interferometers using multi-plane light conversion
Mushkan Sureka, Itay Ozer, Wenhua He +3 more·Mar 16, 2026
Programmable linear optical interferometers are a core primitive in optical signal processing, quantum information processing, and photonic computing. Existing photonic-integrated implementations realize arbitrary $M$-mode unitaries using Mach--Zehnd...
Almost-iid information theory
Giulia Mazzola, David Sutter, Renato Renner·Mar 16, 2026
Information-theoretic techniques are based on the assumption that resources are well characterized by independent and identically distributed (iid) states. This assumption cannot be justified operationally, since, for example, correlations between su...
Post-selected Criticality in Measurement-induced Phase Transitions
Dolly Nambi, Kabir Khanna, Andrew Allocca +4 more·Mar 16, 2026
Information-theoretic phase transitions, such as the measurement-induced phase transition (MIPT), characterize the robustness of quantum dynamics to local monitoring and are naturally formulated in terms of trajectories conditioned on typical measure...
Redundancy from Subsystem Thermalization
Xiangyu Cao, Zohar Nussinov·Mar 16, 2026
In the theory of decoherence, redundancy is the correlation between a quantum system and fractions of the environment. It underlies the emergence of classical behavior. We show that redundancy can persist despite thermalizing dynamics in the environm...
A direct controlled-phase gate between microwave photons
Adrian Copetudo, Amon M. Kasper, Tanjung Krisnanda +4 more·Mar 16, 2026
The rich dynamics and large Hilbert space of quantum harmonic oscillators make them natural candidates for hardware-efficient and error-correctable quantum information processing. However, implementing direct entangling operations between oscillators...
Product Weyl-Heisenberg covariant MUBs and Maximizers of Magick
Bogdan S. Damski, Rafał Bistroń, Diego Ponterio +2 more·Mar 16, 2026
In this work we investigate discrete structures in product Hilbert spaces. For monopartite systems of size $d$ one relies on the Weyl-Heisenberg group $WH(d)$, while in the case of composite Hilbert spaces we identify designs covariant with respect t...
QiboAgent: a practitioner's guideline to open source assistants for Quantum Computing code development
Lorenzo Esposito, Andrea Papaluca, Stefano Carrazza·Mar 16, 2026
We introduce QiboAgent, a reference implementation designed to serve as a practitioner's guideline for developing specialized coding assistants in Quantum Computing middleware. Addressing the limitations in scientific software development of general-...
Quantum Fisher information and quadrature squeezing in Janus superpositions of squeezed vacua
Arash Azizi·Mar 16, 2026
Janus states, defined as coherent superpositions of two single-mode squeezed vacua, provide a simple but genuinely non-Gaussian setting for studying how interference reshapes quantum Fisher information (QFI) beyond the Gaussian squeezed-vacuum pictur...
Separating partially coherent light
Paul-Alexis Mor, Anne R. Kroo, Carson G. Valdez +9 more·Mar 16, 2026
Recent advances in optical imaging and communication increasingly involve high-dimensional, partially coherent light, creating a growing need for scalable tools to measure and manipulate coherence. Here, we demonstrate the automatic separation of spa...
Error semitransparent universal control of a bosonic logical qubit
Saswata Roy, Owen C. Wetherbee, Valla Fatemi·Mar 16, 2026
Bosonic codes offer hardware-efficient approaches to logical qubit construction and hosted the first demonstration of beyond-break even logical quantum memory. However, such accomplishments were done for idling information, and realization of fault-t...
Ab Initio Study of Erbium Point Defects in 4H-SiC for Quantum Devices
Michael Kuban·Mar 16, 2026
Identifying scalable materials systems that exhibit quantum behavior is a central challenge in quantum information science. Point defects in certain wide-bandgap semiconductors are promising in this regard due to the maturity of semiconductor manufac...
Quantum Liang Information Flow vs. Out-of-Time-Order Correlators as Chaos Diagnostics in the Mixed-Field Ising Chain
Bin Yi·Mar 16, 2026
We systematically compare Quantum Liang Information Flow (QLIF) a recently proposed causal information measure with the out-of-time-order correlator (OTOC) as diagnostics of quantum chaos in the one-dimensional mixed-field Ising chain. Using exact di...
Complementarity-Preserving Generative Theory for Multimodal ECG Synthesis: A Quantum-Inspired Approach
Timothy Oladunni, Farouk Ganiyu-Adewumi, Clyde Baidoo +1 more·Mar 16, 2026
Multimodal deep learning has substantially improved electrocardiogram (ECG) classification by jointly leveraging time, frequency, and time-frequency representations. However, existing generative models typically synthesize these modalities independen...
Gaussian superpositions for bosonic encodings
Federico Centrone, Juan Pablo Paz, Augusto Roncaglia·Mar 16, 2026
Non-Gaussian bosonic states are ubiquitous in interacting light--matter systems, many-body platforms, and relativistic quantum field settings, but their quantitative characterization is hindered by the infinite-dimensional Hilbert space and by the po...
Experimental Demonstration of Twin-Field Quantum Digital Signatures over 504 km
Chun-Hui Zhang, Jing-Yang Liu, Wen-Xuan Zhang +5 more·Mar 16, 2026
Digital signatures are one of the security cornerstones of the current information age. Compared with classical digital signatures based on computational complexity, quantum digital signatures (QDS) theoretically guarantee data integrity, authenticit...
Scalable Self-Testing of Mutually Anticommuting Observables and Maximally Entangled Two-Qudits
Souradeep Sasmal, Ritesh K. Singh, Prabuddha Roy +1 more·Mar 16, 2026
The next frontier in device-independent quantum information lies in the certification of scalable and parallel quantum resources, which underpin advanced quantum technologies. We put forth a simultaneous self-testing framework for maximally entangled...
Protecting Distributed Blockchain with Twin-Field Quantum Key Distribution: A Quantum Resistant Approach
Xuan Li, Ying Guo·Mar 16, 2026
Quantum computing provides the feasible multi-layered security challenges to classical blockchain systems. Whereas, quantum-secured blockchains relied on quantum key distribution (QKD) to establish secure channels can address this potential threat. T...