Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Microwave-activated high-fidelity three-qubit gate scheme for fixed-frequency superconducting qubits
Kui Zhao, Wei Ma, Ziting Wang +5 more·Apr 30, 2025
Scalable superconducting quantum processors require balancing critical constraints in coherence, control complexity, and spectral crowding. Fixed-frequency architectures suppress flux noise and simplify control via all-microwave operations but remain...
Detecting genuine multipartite entanglement in multi-qubit devices with restricted measurements
Nicky Kai Hong Li, Xi Dai, Manuel H. Muñoz-Arias +3 more·Apr 29, 2025
Detecting genuine multipartite entanglement (GME) is a state-characterization task that benchmarks coherence and experimental control in quantum systems. Existing GME tests often require joint measurements on many qubits, posing challenges for system...
Bosonization of Noise Effects in Nonlocal Quantum Dynamics
Michele Fantechi, Marco Merkli·Apr 29, 2025
Quantum systems that interact non-locally with an environment are paradigms for exploring collective phenomena. They naturally emerge in various physical contexts involving long-range, many-body interactions. We consider a general class of such open ...
Avoided crossings, degeneracies and Berry phases in the spectrum of quantum noise of driven-dissipative bosonic systems
Giuseppe Patera, Alessandro Pugliese·Apr 29, 2025
Avoided crossings are fundamental phenomena in quantum mechanics and photonics that originate from the interaction between coupled energy levels and have been extensively studied in linear dispersive dynamics. Their manifestation in open, driven-diss...
Language Model for Large-Text Transmission in Noisy Quantum Communications
Yuqi Li, Zhou Shi, Haitao Ma +3 more·Apr 29, 2025
Quantum communication has the potential to revolutionize information processing, providing unparalleled security and increased capacity compared to its classical counterpart by using the principles of quantum mechanics. However, the presence of noise...
A foundry-fabricated spin qubit unit cell with in-situ dispersive readout
Pierre Hamonic, Mathieu Toubeix, G. Haas +10 more·Apr 29, 2025
Spin qubits based on semiconductor quantum dots are a promising prospect for quantum computation because of their high coherence times and gate fidelities. However, scaling up those structures to the numbers required by fault-tolerant quantum computi...
Petz recovery maps of single-qubit decoherence channels in an ion trap quantum processor
Wen-Han Png, Valerio Scarani·Apr 29, 2025
The Petz recovery map provides a near-optimal reversal of quantum noise, yet proposals for its implementation are only recent. We propose a physical realization of the exact state-specific Petz map in an ion trap for qubit decoherence channels. Our c...
Quantum Error Correction in Quaternionic Hilbert Spaces
Valentine Nyirahafashimana, Nurisya Mohd Shah, Umair Abdul Halim +2 more·Apr 28, 2025
We propose quaternion-based strategies for quantum error correction by extending quantum mechanics into quaternionic Hilbert spaces. Building on the properties of quaternionic quantum states, we define quaternionic analogues of Pauli operators and qu...
Rapid and efficient wavefront correction for spatially entangled photons using symmetrized optimization
Kiran Bajar, Ronen Shekel, Vikas S. Bhat +3 more·Apr 28, 2025
Spatial entanglement is a key resource in quantum technologies, enabling applications in quantum communication, imaging, and computation. However, propagation through complex media distorts spatial correlation, posing a challenge for practical implem...
Estimating decoding graphs and hypergraphs of memory QEC experiments
E. Takou, Kenneth R. Brown·Apr 28, 2025
Characterizing the error sources of quantum devices is essential for building reliable large-scale quantum architectures and tailoring error correction codes to the noise profile of the devices. Tomography techniques can provide detailed information ...
QFDNN: A Resource-Efficient Variational Quantum Feature Deep Neural Networks for Fraud Detection and Loan Prediction
Subham Das, Ashtakala Meghanath, B. Behera +3 more·Apr 28, 2025
Social financial technology focuses on trust, sustainability, and social responsibility, which require advanced technologies to address complex financial tasks in the digital era. With the rapid growth in online transactions, automating credit card f...
Stochastic quantum adiabatic algorithm with fractional Brownian motion
Osanda Chinthila, Pani W Fernando, A. Mahasinghe +2 more·Apr 28, 2025
Adiabatic Quantum Computing relies on the quantum adiabatic theorem, which states that a quantum system evolves along its ground state with time if the governing Hamiltonian varies infinitely slowly. However, practical limitations force computations ...
Fooling the Decoder: An Adversarial Attack on Quantum Error Correction
J. Lenssen, A. Paler·Apr 28, 2025
Neural network decoders are becoming essential for achieving fault-tolerant quantum computations. However, their internal mechanisms are poorly understood, hindering our ability to ensure their reliability and security against adversarial attacks. Le...
Parallelized Givens Ansatz for Molecular ground-states: Bridging Accuracy and Efficiency on NISQ Platforms
M. R. Nirmal, Ankit Khandelwal, Manoj Nambiar +1 more·Apr 25, 2025
In recent years, the Variational Quantum Eigensolver (VQE) has emerged as one of the most popular algorithms for solving the electronic structure problem on near-term quantum computers. The utility of VQE is often hindered by the limitations of curre...
Efficient witnessing and testing of magic in mixed quantum states
Tobias Haug, P. S. Tarabunga·Apr 25, 2025
Nonstabilizerness or `magic' is a crucial resource for quantum computers which can be distilled from noisy quantum states. However, determining the magic of mixed quantum has been a notoriously difficult task. Here, we provide efficient witnesses of ...
Preparing Greenberger-Horne-Zeilinger states on ground levels of neutral atoms
Zhu-yao Jin, Jun Jing·Apr 25, 2025
We propose a scalable protocol in the Rydberg atomic system to generate the Greenberger-Horne-Zeilinger (GHZ) states, where the qubits are encoded on the hyperfine ground levels. Our system is featured with off-resonant driving fields rather than str...
Quantum-Enhanced Change Detection and Joint Communication-Detection
Zihao Gong, Saikat Guha·Apr 24, 2025
Quick detection of transmittance changes in optical channel is crucial for secure communication. We demonstrate that pre-shared entanglement using two-mode squeezed vacuum states significantly reduces detection latency compared to classical and entan...
Beating the break-even point with autonomous quantum error correction
Yi Li, Qingyuan Mei, Qing-Xuan Jie +13 more·Apr 23, 2025
Quantum error correction (QEC) is essential for practical quantum computing, as it protects fragile quantum information from errors by encoding it in high-dimensional Hilbert spaces. Conventional QEC protocols typically require repeated syndrome meas...
Preconditioning Natural and Second Order Gradient Descent in Quantum Optimization: A Performance Benchmark
Th'eo Lisart-Liebermann, Arcesio Castaneda Medina·Apr 23, 2025
The optimization of parametric quantum circuits is technically hindered by three major obstacles: the non-convex nature of the objective function, noisy gradient evaluations, and the presence of barren plateaus. As a result, the selection of classica...
Learning to decode logical circuits
Yiqing Zhou, Chao Wan, Yichen Xu +3 more·Apr 23, 2025
As quantum hardware advances toward enabling error-corrected quantum circuits in the near future, the absence of an efficient polynomial-time decoding algorithm for logical circuits presents a critical bottleneck. While quantum memory decoding has be...