Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Multimode Fock-State Measurements using Dispersive Shifts in a Trapped Ion
Wonhyeong Choi, Jiyong Kang, Kyunghye Kim +3 more·Jan 8, 2026
Trapped ions naturally host multiple motional modes alongside long-lived spin qubits, providing a scalable multimode bosonic register. Efficiently characterizing such bosonic registers requires the ability to access many motional modes with limited s...
Observation of ΔJ=0 Rotational Excitation in Dense Hydrogens
Jie Feng, XiaoDi Liu, Haian Xu +3 more·Jan 8, 2026
Raman measurements performed on dense H2, D2 and H2+D2 in a wide pressure-temperature range reveal the presence of the ΔJ=0 rotational excitation. In the gas/fluid state this excitation has zero Raman shift, but in the solid, the crystal field drive ...
Increasing the secret key rates and point-to-multipoint extension for experimental coherent-one-way quantum key distribution protocol
Venkat Abhignan, Mohit Mittal, Aditi Das +1 more·Jan 8, 2026
Using quantum key distribution (QKD) protocols, a secret key is created between two distant users (transmitter and receiver) at a particular key rate. Quantum technology can facilitate secure communication for cryptographic applications, combining QK...
Maximal Entanglement and Frozen Information: A Unified Framework for Dynamical Quantum Phase Transitions
Kaiyuan Cao, Mingzhi Li, Xiang-Ping Jiang +2 more·Jan 8, 2026
Dynamical quantum phase transitions (DQPTs) are temporal singularities marked by zeros of the Loschmidt echo, yet their underlying quantum-information structure remains elusive. Here, we introduce a momentum-resolved entanglement entropy as a direct ...
Theoretical investigation of non-Förster exciton transfer mechanisms in perylene diimide donor, phenylene bridge, and terrylene diimide acceptor systems
Lei Yang, Seogjoo J. Jang·Jan 8, 2026
The rates of exciton transfer within dyads of perylene diimide and terrylene diimide connected by oligophenylene bridge units have been shown to deviate significantly from those of Förster's resonance energy transfer theory, according to single molec...
Holographic codes seen through ZX-calculus
Kwok Ho Wan, H. C. W. Price, Qing Yao·Jan 8, 2026
We re-visit the pentagon holographic quantum error correcting code from a ZX-calculus perspective. By expressing the underlying tensors as ZX-diagrams, we study the stabiliser structure of the code via Pauli webs. In addition, we obtain a diagrammati...
Quantum mechanics provides the physical basis of teleological evolutions
G. Castagnoli·Jan 8, 2026
We show that the quantum computational speedup of quantum algorithms is due to their teleological character, their being evolutions toward a goal (the solution of the problem) with an attractor in the very goal they will produce in the future (the so...
Tunable Quantum Interference in Free Space with a Liquid-Crystal Metagrating
Maria Gorizia Ammendola, Italo Machuca Flores, S. Dey +9 more·Jan 8, 2026
Structured optical materials provide a promising platform for photonic quantum information processing in free space. Beam splitters, a fundamental building block of photonic circuits, have recently been demonstrated in free space using geometric-phas...
Pauli Measurements Are Near-Optimal for Pure State Tomography
Sabee Grewal, Meghal Gupta, William He +2 more·Jan 7, 2026
We give an algorithm for pure state tomography with near-optimal copy complexity using single-qubit measurements. Specifically, given $\widetilde{O}(2^n/ε)$ copies of an unknown pure $n$-qubit state $\lvertψ\rangle$, the algorithm performs only \text...
A Broadband Nanowire Quantum Dot Cavity Design for the Efficient Extraction of Entangled Photons
Sayan Gangopadhyay, Sasan V. Grayli, Sathursan Kokilathasan +1 more·Jan 7, 2026
A bright source of on-demand entangled photons is needed for quantum networks. A single quantum dot in a site-selected nanowire waveguide is a promising candidate for realizing such sources. However, such sources are associated with poor single-photo...
Solving nonlinear differential equations on noisy $156$-qubit quantum computers
Karla Baumann, Youcef Modheb, Roman Randrianarisoa +3 more·Jan 7, 2026
In this paper, we report on the resolution of nonlinear differential equations using IBM's quantum platform. More specifically, we demonstrate that the hybrid classical-quantum algorithm H-DES successfully solves a one-dimensional material deformatio...
Implementation of Tensor Network Simulation TN-Sim under NWQ-Sim
Aaron C. Hoyt, Jonathan S. Bersson, Sean Garner +2 more·Jan 7, 2026
Large-scale tensor network simulations are crucial for developing robust complexity-theoretic bounds on classical quantum simulation, enabling circuit cutting approaches, and optimizing circuit compilation, all of which aid efficient quantum computat...
Distribution-Guided and Constrained Quantum Machine Unlearning
Nausherwan Malik, Zubair Khalid, Muhammad Faryad·Jan 7, 2026
Machine unlearning aims to remove the influence of specific training data from a learned model without full retraining. While recent work has begun to explore unlearning in quantum machine learning, existing approaches largely rely on fixed, uniform ...
Exact Multimode Quantization of Superconducting Circuits via Boundary Admittance and Continued Fractions
Mustafa Bakr, Robin Wopalenski·Jan 7, 2026
Accurate extraction of linearized quantum circuit models from electromagnetic simulations is essential for the design of superconducting circuits. We present a quantization framework based on the driving-point admittance $Y_{\mathrm{in}}(s)$ seen by ...
Thermodynamic significance of QUBO encoding on quantum annealers
Emery Doucet, Zakaria Mzaouali, Reece Robertson +3 more·Jan 7, 2026
Quadratic unconstrained binary optimization (QUBO) is the standard interface to quantum annealers, yet a single constrained task admits many QUBO encodings whose penalty choices reshape the energy landscape experienced by hardware. We study a Job Sho...
Solving nonlinear PDEs with Quantum Neural Networks: A variational approach to the Bratu Equation
Nikolaos Cheimarios·Jan 7, 2026
We present a variational quantum algorithm (VQA) to solve the nonlinear one-dimensional Bratu equation. By formulating the boundary value problem within a variational framework and encoding the solution in a parameterized quantum neural network (QNN)...
Quantum sensing with critical systems: impact of symmetry, imperfections, and decoherence
Yinan Chen, Sara Murciano, Pablo Sala +1 more·Jan 7, 2026
Entangled many-body states enable high-precision quantum sensing beyond the standard quantum limit. We develop interferometric sensing protocols based on quantum critical wavefunctions and compare their performance with Greenberger-Horne-Zeilinger (G...
Fast Phase Logic Family for Achieving Very Large Scale Integration in Superconductor Electronics
Sasan Razmkhah, Massoud Pedram·Jan 7, 2026
Fast Phase Logic (FPL) is a novel digital superconductor electronic (SCE) logic family specifically designed to address critical challenges in state-of-the-art SCE, such as low device density and integration levels. The FPL family improves circuit pe...
Energy-Time-Accuracy Tradeoffs in Thermodynamic Computing
Alberto Rolandi, Paolo Abiuso, Patryk Lipka-Bartosik +3 more·Jan 7, 2026
In the paradigm of thermodynamic computing, instead of behaving deterministically, hardware undergoes a stochastic process in order to sample from a distribution of interest. While it has been hypothesized that thermodynamic computers may achieve bet...
Scalable cold-atom quantum simulator of a $3+1$D U$(1)$ lattice gauge theory with dynamical matter
Simone Orlando, Guo-Xian Su, Bing Yang +1 more·Jan 7, 2026
The stated overarching goal of the highly active field of quantum simulation of high-energy physics (HEP) is to achieve the capability to study \textit{ab-initio} real-time microscopic dynamics of $3+1$D quantum chromodynamics (QCD). However, existin...