Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Symmetry-Adapted State Preparation for Quantum Chemistry on Fault-Tolerant Quantum Computers
Viktor Khinevich, Wataru Mizukami·Jan 13, 2026
We present systematic and resource-efficient constructions of continuous symmetry projectors, particularly $U(1)$ particle number and $SU(2)$ total spin, tailored for fault-tolerant quantum computations. Our approach employs a linear combination of u...
MultiQ: Multi-Programming Neutral Atom Quantum Architectures
Francisco Romão, Daniel Vonk, Emmanuil Giortamis +2 more·Jan 13, 2026
Neutral atom Quantum Processing Units (QPUs) are emerging as a popular quantum computing technology due to their large qubit counts and flexible connectivity. However, performance challenges arise as large circuits experience significant fidelity dro...
Toolchain for shuttling trapped-ion qubits in segmented traps
Andreas Conta, Santiago Bogino, Frodo Köhncke +2 more·Jan 13, 2026
Scalable trapped-ion quantum computing requires fast and reliable transport of ions through complex, segmented radiofrequency trap architectures without inducing excessive motional excitation. We present a numerical toolchain for the systematic gener...
Rigorous phase-error-estimation security framework for QKD with correlated sources
Guillermo Currás-Lorenzo, Margarida Pereira, Kiyoshi Tamaki +1 more·Jan 13, 2026
Practical QKD modulators introduce correlations between consecutively emitted pulses due to bandwidth limitations, violating key assumptions underlying many security proof techniques. Here, we address this problem by introducing a simple yet powerful...
Quantum scientists for disarmament: a manifesto
Quantum Scientists for Disarmament·Jan 13, 2026
We, as researchers in quantum science and technology, are publishing this manifesto to express our deep concerns about the current geopolitical situation and the global race to rearm. We firmly oppose all forms of militarization in our societies and,...
On-chip semi-device-independent quantum random number generator exploiting contextuality
Maddalena Genzini, Caterina Vigliar, Mujtaba Zahidy +6 more·Jan 13, 2026
We present a semi-device-independent quantum random number generator (QRNG) based on the violation of a contextuality inequality, implemented by the integration of two silicon photonic chips. Our system combines a heralded single-photon source with a...
A dataflow programming framework for linear optical distributed quantum computing
Giovanni de Felice, Boldizsár Poór, Cole Comfort +4 more·Jan 13, 2026
Photonic systems offer a promising platform for interconnecting quantum processors and enabling scalable, networked architectures. Designing and verifying such architectures requires a unified formalism that integrates linear algebraic reasoning with...
A Methodological Analysis of Empirical Studies in Quantum Software Testing
Yuechen Li, Minqi Shao, Jianjun Zhao +1 more·Jan 13, 2026
In quantum software engineering (QSE), quantum software testing (QST) has attracted increasing attention as quantum software systems grow in scale and complexity. Since QST evaluates quantum programs through execution under designed test inputs, empi...
Verification of continuous variable entanglement with undetected photons
Sanjukta Kundu, Balakrishnan Viswanathan, Pawel Szczypkowski +3 more·Jan 13, 2026
We verify transverse spatial entanglement of photon-pairs generated in spontaneous parametric down conversion using a nonlinear interferometric technique without relying on any coincidence detection. We experimentally demonstrate the violation of the...
Criteria on quantum fluctuations of vacuum and photons influence in Spontaneous-Parametric Down-Conversion and Four-Wave-Mixing
Benoît Boulanger, Gaspar Mougin-Trichon, Véronique Boutou·Jan 13, 2026
This article is a theoretical and quantitative exploration of the limit regarding the pump intensity between the two regimes of spontaneous-parametric down-conversion (SPDC) as well as of four-wave-mixing (FWM) in the framework of a semi-classical mo...
Eigenstate thermalization in thermal first-order phase transitions
Maksym Serbyn, Alexander Avdoshkin, Oriana K. Diessel +1 more·Jan 13, 2026
The eigenstate thermalization hypothesis (ETH) posits how isolated quantum many-body systems thermalize, assuming that individual eigenstates at the same energy density have identical expectation values of local observables in the limit of large syst...
Critical quantum states and hierarchical spectral statistics in a Cantor potential
F. Iwase·Jan 13, 2026
We study the spectral statistics and wave-function properties of a one-dimensional quantum system subject to a Cantor-type fractal potential. By analyzing the nearest-neighbor level spacings, inverse participation ratio (IPR), and the scaling behavio...
Extending Qubit Coherence Time via Hybrid Dynamical Decoupling
Qi Yao, Jun Zhang, Wenxian Zhang +1 more·Jan 13, 2026
Dynamical decoupling (DD) and bath engineering are two parallel techniques employed to mitigate qubit decoherence resulting from their unavoidable coupling to the environment. Here, we present a hybrid DD approach that integrates pulsed DD with bath ...
A Preparation Nonstationarity Loophole in Superconducting-Qubit Bell Tests
Prosanta Pal, Shubhanshu Karoliya, Gargee Sharma +1 more·Jan 13, 2026
Bell or Clauser-Horne-Shimony-Holt (CHSH) tests on superconducting quantum processors are commonly interpreted under the assumption that repeated circuit executions sample a single, stationary preparation ensemble. Here we show that this assumption c...
Efficient and broadband quantum frequency comb generation in a monolithic AlGaAs-on-insulator microresonator
Xiaodong Zheng, Xu Jing, Chenbo Liu +9 more·Jan 13, 2026
The exploration of photonic systems for quantum information processing has generated widespread interest in multiple cutting-edge research fields. Photonic frequency encoding stands out as an especially viable approach, given its natural alignment wi...
Limits of Rank Recovery in Bilinear Observation Problems
Seungbeom Choi·Jan 13, 2026
Bilinear observation problems arise in many physical and information-theoretic settings, where observables and states enter multiplicatively. Rank-based diagnostics are commonly used in such problems to assess the effective dimensionality accessible ...
Reference-frame-independent Quantum secure direct communication
Jia-Wei Ying, Shi-Pu Gu, Xing-Fu Wang +7 more·Jan 13, 2026
Current quantum secure direct communication (QSDC) protocols guarantee communication security by estimating the error rates of photons in the X and Z bases. This take the reference frame calibration between communicating parties as a necessary prereq...
Quantum State Discrimination Enhanced by FPGA-Based AI Engine Technology
Anastasiia Butko, Artem Marisov, David I. Santiago +1 more·Jan 13, 2026
Identifying the state of a quantum bit (qubit), known as quantum state discrimination, is a crucial operation in quantum computing. However, it has been the most error-prone and time-consuming operation on superconducting quantum processors. Due to s...
Vacuum-dressed superconductivity in NbN observed in a high-$Q$ terahertz cavity
Hongjing Xu, Andrey Baydin, Qinyan Yi +8 more·Jan 13, 2026
Emerging theoretical frameworks suggest that physical properties of matter can be altered within an optical cavity by harnessing quantum vacuum electromagnetic fluctuations, even in the total absence of external driving fields. Among the most intrigu...
Dissipative ground-state preparation of a quantum spin chain on a trapped-ion quantum computer
Kazuhiro Seki, Yuta Kikuchi, Tomoya Hayata +1 more·Jan 13, 2026
We demonstrate a dissipative protocol for ground-state preparation of a quantum spin chain on a trapped-ion quantum computer. As a first step, we derive a Kraus representation of a dissipation channel for the protocol recently proposed by Ding et al....