Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Surface code scaling on heavy-hex superconducting quantum processors
Arian Vezvaee, Cesar Benito, Mario Morford-Oberst +2 more·Oct 21, 2025
Demonstrating subthreshold scaling of a surface-code quantum memory on hardware whose native connectivity does not match the code remains a central challenge. We address this on IBM heavy-hex superconducting processors by co-designing the code embedd...
Measurement-Based Fault-Tolerant Quantum Computation on High-Connectivity Devices: A Resource-Efficient Approach toward Early FTQC
Yohei Ibe, Yutaka Hirano, Yasuo Ozu +2 more·Oct 21, 2025
We propose a measurement-based FTQC (MB-FTQC) architecture for high-connectivity platforms such as trapped ions and neutral atoms. The key idea is to use verified logical ancillas combined with Knill's error-correcting teleportation, eliminating repe...
Every Benchmark All at Once
Ana Silva, Eliska Greplova·Oct 21, 2025
As quantum technology matures, the efficient benchmarking of quantum devices remains a key challenge. Although sample-efficient, information-theoretic benchmarking techniques have recently been proposed, there is still a gap in adapting these techniq...
Interplay of Noise and Reservoir-induced Decoherence in Persistent Currents
Samudra Sur, Thierry Giamarchi·Oct 20, 2025
Persistent current is a hallmark of quantum phase coherence. We study the fate of the persistent current in a non-equilibrium setting, where a tight-binding ring is subjected to stochastic disorder as well as a fermionic reservoir attached to each si...
Synthesizing an Optimal Spin Qubit Shuttling Bus Architecture for the Surface Code
Pau Escofet, Eduard Alarcón, Sergi Abadal +4 more·Oct 20, 2025
As quantum computers scale toward millions of physical qubits, it becomes essential to robustly encode individual logical qubits to ensure fault tolerance under realistic noise. A high-quality foundational encoding allows future compilation technique...
Field-Trial Quantum Key Distribution with Qubit-Based Frame Synchronization
Rui Guan, Jingchun Yu, Zhaoyun Li +7 more·Oct 20, 2025
Quantum key distribution (QKD) is a cryptographic technique that uses quantum mechanical principles to enable secure key exchange. Practical deployment of QKD requires robust, cost-effective systems that can operate in challenging field environments....
Quantum Reciprocity: A Structured-Bath Hamiltonian for Coherent Amplification
Ridwan Sakidja·Oct 20, 2025
Macroscopic quantum amplifiers maintain coherence even while strongly coupled to their surroundings, demonstrating that coherence can be preserved through architecture rather than isolation. Here we derive a finite structured-bath Hamiltonian in whic...
Hardware-efficient formulation of molecular cavity-QED Hamiltonians
Francesco Troisi, Simone Latini, Heiko Appel +3 more·Oct 20, 2025
Light-matter coupled Hamiltonians are central to cavity materials engineering and polaritonic chemistry, but are challenging to simulate with classical hardware due to the scaling of the Hilbert space with the number of quantum photon modes and matte...
Detector Asymmetry in Continuous Variable Quantum Key Distribution
Jennifer O Bartlett, Alfie J Myers Wilson, Christopher J Chunnilall +1 more·Oct 20, 2025
In Local-local Oscillator (LLO) based Continuous-Variable Quantum Key Distribution (CV-QKD), the phase reference of the transmitter and receiver, Alice and Bob, are naturally de-correlated due to their use of individual lasers. A phase reference sign...
Phase estimation via photon subtraction at the output of the hybrid interferometer
Qisi Zhou, Tao Jiang, Qingqian Kang +4 more·Oct 20, 2025
The hybrid interferometer integrating an optical parametric amplifier and a beam splitter has the potential to outperform the SU(1,1) interferometer. However, photon loss remains a critical limitation for practical implementation. To address this cha...
Long-distance distribution of atom-photon entanglement based on a cavity-free cold atomic ensemble
Tian-Yu Wang, Ren-Hui Chen, Yan Li +10 more·Oct 20, 2025
Constructing a quantum memory node with the ability of long-distance atom-photon distribution is the essential task for future quantum networks, enabling distributed quantum computing, quantum cryptography and remote sensing. Here we report the demon...
Preserving quantum coherence in thermal noisy systems via qubit frequency modulation
Mahshid Khazaei Shadfar, Farzam Nosrati, Ali Mortezapour +3 more·Oct 19, 2025
Quantum coherence is a key resource underpinning quantum technologies, yet it is highly susceptible to environmental decoherence, especially in thermal settings. While frequency modulation (FM) has shown promise in preserving coherence at zero temper...
Modified Langevin noise formalism for multiple quantum emitters in dispersive electromagnetic environments out of equilibrium
Giovanni Miano, Loris Maria Cangemi, Carlo Forestiere·Oct 19, 2025
The control of interactions among quantum emitters through nanophotonic structures offers significant opportunities for quantum technologies. However, a rigorous theoretical description of the interaction of multiple quantum emitters with complex, di...
28 GHz Wireless Channel Characterization for a Quantum Computer Cryostat at 4 Kelvin
Ama Bandara, Viviana Centritto Arrojo, Heqi Deng +6 more·Oct 19, 2025
The scalability of quantum computing systems is constrained by the wiring complexity and thermal load introduced by dense wiring for control, readout and synchronization at cryogenic temperatures. To address this challenge, we explore the feasibility...
Parameter Analysis and Optimization of Layer Fidelity for Quantum Processor Benchmarking at Scale
Maria Jose Lozano Palacio, Hasan Nayfeh, Matthew Ware +1 more·Oct 19, 2025
With the continued scaling of quantum processors, holistic benchmarks are essential for extensively evaluating device performance. Layer fidelity is a benchmark well-suited to assessing processor performance at scale. Key advantages of this benchmark...
Countermeasures for Trojan-Horse Attacks on self-compensating all-fiber polarization modulator
Alberto De Toni, Aynur Cemre Aka, Costantino Agnesi +3 more·Oct 19, 2025
Quantum Key Distribution (QKD) leverages the principles of quantum mechanics to exchange a secret key between two parties. Unlike classical cryptographic systems, the security of QKD is not reliant on computational assumptions but is instead rooted i...
Post-processed estimation of quantum state trajectories
Soroush Khademi, Jesse J. Slim, Kiarn T. Laverick +5 more·Oct 19, 2025
Weak quantum measurements enable real-time tracking and control of dynamical quantum systems, producing quantum trajectories -- evolutions of the quantum state of the system conditioned on measurement outcomes. For classical systems, the accuracy of ...
Mitigating Detuning-Induced Systematic Errors in Entanglement-Enhanced Metrology
Shingo Kukita, Yuichiro Matsuzaki·Oct 19, 2025
Quantum sensing leverages non-classical resources to enhance precision. In particular, Greenberger-Horne-Zeilinger (GHZ) states can, in principle, attain the Heisenberg limit that surpasses the standard quantum limit. While many studies have examined...
Efficient bidirectional quantum frequency conversion between telecom and visible bands using programmable III-V nanophotonic waveguides
Jierui Hu, Hao Yuan, Joshua Akin +3 more·Oct 19, 2025
Quantum frequency conversion (QFC) is essential for interfacing quantum systems operating at different wavelengths and for realizing scalable quantum networks. Despite extensive progress, achieving QFC with simultaneous high efficiency, low pump powe...
Adversarially Robust Quantum Transfer Learning
Amena Khatun, Muhammad Usman·Oct 18, 2025
Quantum machine learning (QML) has emerged as a promising area of research for enhancing the performance of classical machine learning systems by leveraging quantum computational principles. However, practical deployment of QML remains limited due to...