Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Supernematic
Dan Mao, Eun-Ah Kim·Nov 13, 2025
Quantum theory of geometrically frustrated systems is usually approached as a gauge theory where the local conservation law becomes the Gauss law. Here we show that it can do something fundamentally different: enforce a global conserved quantity via ...
Emergent spin order and steady-state superradiance in one-dimensional baths
Silvia Cardenas-Lopez, Edgar Guardiola-Navarrete, Ana Asenjo-Garcia·Nov 13, 2025
Spontaneous collective decay in incoherently driven atomic ensembles generates macroscopic coherence in the steady state, as exemplified by superradiant lasing in single-mode cavities. Whether spontaneous order persists in multimode reservoirs with c...
Impacts of Decoder Latency on Utility-Scale Quantum Computer Architectures
Abdullah Khalid, Allyson Silva, Gebremedhin A. Dagnew +10 more·Nov 13, 2025
The speed of a fault-tolerant quantum computer is dictated by the reaction time of its classical electronics, that is, the total time required by decoders and controllers to determine the outcome of a logical measurement and execute subsequent condit...
Quantum Algorithms for Computing Maximal Quantum $f$-divergence and Kubo-Ando means
Trung Hoa Dinh, Nhat A. Nghiem·Nov 13, 2025
The development of quantum computation has resulted in many quantum algorithms for a wide array of tasks. Recently, there is a growing interest in using quantum computing techniques to estimate or compute quantum information-theoretic quantities such...
Information phases of partial projected ensembles generated from random quantum states and scrambling dynamics
Alan Sherry, Saptarshi Mandal, Sthitadhi Roy·Nov 13, 2025
The projected ensemble -- an ensemble of pure states on a subsystem conditioned on projective measurement outcomes on its complement -- provides a finer probe of ergodicity and information structure than the reduced density matrix of the subsystem in...
Finite-size quantum key distribution rates from Rényi entropies using conic optimization
Mariana Navarro, Andrés González Lorente, Pablo V. Parellada +2 more·Nov 13, 2025
Finite-size general security proofs for quantum key distribution based on Rényi entropies have recently been introduced. These approaches are more flexible and provide tighter bounds on the secret key rate than traditional formulations based on the v...
Towards autonomous quantum physics research using LLM agents with access to intelligent tools
Sören Arlt, Xuemei Gu, Mario Krenn·Nov 13, 2025
Artificial intelligence (AI) is used in numerous fields of science, yet the initial research questions and targets are still almost always provided by human researchers. AI-generated creative ideas in science are rare and often vague, so that it rema...
Crossing Symmetry and Entanglement
Navin McGinnis·Nov 13, 2025
We study the interplay between crossing symmetry and entanglement in $2 \to 2$ scattering within local quantum field theories that possess an $SU(N)$ global symmetry. In particular, we recast scattering amplitudes of fixed helicity as quantum operati...
Observation and Manipulation of Optical Parametric Down-Conversion in the Langevin Regime
Yen-Ju Chen, Chun-Yuan Cheng, Tien-Dat Pham +4 more·Nov 13, 2025
Quantum fluctuation plays a key role in the parametric down-conversion in the Langevin regime. In this paper, we report the experimental realization of optical parametric down-conversion in the Langevin regime on a chip. By precisely controlling the ...
Quantum Computational Structure of $SU(N)$ Scattering
Navin McGinnis·Nov 13, 2025
We study scattering of particles which obey an $SU(N)$ global symmetry through the lens of quantum computation and quantum algorithms. We show that for scattering between particles which transform in the fundamental or anti-fundamental representation...
In-vacuum surface flashover of SiN, AlN, and etched SiO2 thin films at micrometre scales
Vijay Kumar, Martin Siegele-Brown, Matthew Aylett +2 more·Nov 13, 2025
We investigate the surface flashover voltage threshold for SiO$_2$, SiN, and AlN thin films over micrometre scale lengths. Furthermore, we test the effects of different etching chemistries on SiO$_2$ layers. We find that there is little significant d...
Frequency Spectra of Isolated Laser Pulse Envelopes
L. H. Ford, Brian Fu·Nov 13, 2025
This paper will deal with isolated laser pulses, those which last for a finite time interval and whose envelope function is strictly zero outside of this interval. We numerically calculate the Fourier transform of this function and study its asymptot...
Entanglement Structure of Nonlocal Field Theories
Reza Pirmoradian, M. Hossein Bek-Khoshnevis, Sadaf Ebadi +1 more·Nov 13, 2025
Nonlocal interactions are known to generate volume-law entanglement entropy. However, their deeper impact on the fine structure of quantum correlations remains a key open question. In this work, we explore a bosonic nonlocal field theory, examining c...
Tuning the Critical Current in Toroidal Superfluids via Controllable Impurities
K. Xhani, G. Del Pace, N. Grani +4 more·Nov 13, 2025
We combine numerical and experimental approaches to study how impurities affect the maximum superflow in an annular Bose-Einstein condensate. By tuning the impurity density, we achieve precise control over the stability of persistent currents which i...
Quantum Design Automation: Foundations, Challenges, and the Road Ahead
Feng Wu, Jingzhe Guo, Tian Xia +12 more·Nov 13, 2025
Quantum computing is transitioning from laboratory research to industrial deployment, yet significant challenges persist: system scalability and performance, fabrication yields, and the advancement of algorithms and applications. We emphasize that in...
Enhanced shortcuts to adiabaticity for coherent atom transport in a family of two-dimensional dynamical optical lattices
Sascha H. Hauck, Vladimir M. Stojanovic·Nov 13, 2025
In view of the compelling need for coherent atom transport as a prerequisite for a variety of emerging quantum technologies, we investigate such transport on the example of an adjustable family of two-dimensional optical lattices [L. Tarruell {\em et...
From Local Nonclassicality to Entanglement: A Convexity Law for Single-Excitation Dynamics
Atta ur Rahman, Ao-xiang Liu, M. Y. Abd-Rabbou +1 more·Nov 13, 2025
We prove a simple dynamical law for excitation-preserving interactions: the {sum of local Wigner negativities} is upper-bounded by a fixed budget set by the initially excited state. For the single-excitation sector of the XY model (and its beam-split...
Enhanced Digitized Adiabatic Quantum Factorization Algorithm Using Null-Space Encoding
Felip Pellicer·Nov 13, 2025
Integer factorization is a computational problem of fundamental importance in cybersecurity and secure communications, as its difficulty form the basis of modern public-key cryptography. While Shor's algorithm can solve this problem efficiently on a ...
Entanglement Phase Transition in Chaotic non-Hermitian Systems
Zhen-Tao Zhang, Feng Mei·Nov 13, 2025
We study an entanglement phase transition in a class of chaotic non-Hermitian spin chains whose spin-spin coupling terms commute with the non-Hermitian contributions. Two representative models are investigated: the transverse-field Ising model with a...
Hardware-Efficient Bosonic Module for Entangling Superconducting Quantum Processors via Optical Networks
Jia-Hua Zou, Weizhou Cai, Jia-Qi Wang +7 more·Nov 13, 2025
Scaling superconducting quantum processors beyond single dilution refrigerators requires efficient optical interconnects, yet integrating microwave-to-optical (M2O) transducers poses challenges due to frequency mismatches and qubit decoherence. We pr...