Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Multifunctional Nonreciprocal Quantum Device Based on Superconducting Quantum Circuit
Yue Cai, Jie Liu, Kang-Jie Ma +1 more·Mar 9, 2025
Nonreciprocal devices, such as isolator or circulator, are crucial for information routing and processing in quantum networks. Traditional nonreciprocal devices, which rely on the application of bias magnetic fields to break time‐reversal symmetry an...
Driven Magnon-Photon System as a Tunable Quantum Heat Rectifier
C. O. Edet, K. Słowik, N. Ali +2 more·Mar 8, 2025
Controlling heat flow at the quantum level is a key challenge for next-generation quantum technologies, including thermal management and quantum information processing. Here, we investigate quantum heat transport in an asymmetrically driven hybrid ma...
The Quantum Cram\'er-Rao lower bound (Why quantum computers won't work I)
L. McGuinness·Mar 8, 2025
Quantum information science currently poses a troubling contradiction. It can be summarized as: (1) To factor efficiently, quantum computers must perform exponentially precise energy estimation. (2) Exponentially precise energy estimation is impossib...
Compare Similarities Between DNA Sequences Using Permutation-Invariant Quantum Kernel
Chenyu Shi, Gabriele Leoni, Mauro Petrillo +2 more·Mar 7, 2025
Computing the similarity between two DNA sequences is of vital importance in bioscience, yet it can be computationally expensive on classical hardware. For example, the edit distance with move operations (EDM), a DNA similarity measure of interest in...
Entanglement Transitions in Noisy Quantum Circuits on Trees
V. Ravindranath, Yiqiu Han, Xiao Chen·Mar 6, 2025
Decoherence is ubiquitous, and poses a significant impediment to the observation of quantum phenomena, such as the measurement-induced entanglement phase transition (MIPT). In this work, we study entanglement transitions in quantum circuits on trees,...
Deterministic generation of multiqubit entangled states among distant parties using indefinite causal order
Wen‐Qiang Liu, Hai‐Rui Wei·Mar 5, 2025
Quantum entanglement plays an irreplaceable role in various remote quantum information processing tasks. Here we present protocols for generating deterministic and heralded $N$-qubit entangled states across multiple network nodes. By utilizing a pre-...
KLiNQ: Knowledge Distillation-Assisted Lightweight Neural Network for Qubit Readout on FPGA
Xiaorang Guo, Tigran Bunarjyan, Dailin Liu +2 more·Mar 5, 2025
Superconducting qubits are among the most promising candidates for building quantum information processors. Yet, they are often limited by slow and error-prone qubit readout-a critical factor in achieving high-fidelity operations. While current metho...
Bounding the computational power of bosonic systems
Varun Upreti, Ulysse Chabaud·Mar 5, 2025
Bosonic quantum systems operate in an infinite-dimensional Hilbert space, unlike discrete-variable quantum systems. This distinct mathematical structure leads to fundamental differences in quantum information processing, such as an exponentially grea...
Quantum state exclusion for group-generated ensembles of pure states
Arnau Diebra, Santiago Llorens, Emili Bagan +2 more·Mar 4, 2025
Quantum state exclusion is the task of determining which states from a given set a system was not prepared in. We provide a complete solution to optimal quantum state exclusion for arbitrary sets of pure states generated by finite groups, establishin...
Measurement-Induced Crossover of Quantum Jump Statistics in Postselection-Free Many-Body Dynamics
Kazuki Yamamoto, Ryusuke Hamazaki·Mar 4, 2025
We reveal a nontrivial crossover of subsystem fluctuations of quantum jumps in continuously monitored many-body systems, which have a trivial maximally mixed state as a steady-state density matrix. While the fluctuations exhibit the standard volume l...
Renormalization and Low-Energy Effective Models in Cavity and Circuit QED
Daniele Lamberto, A. Mercurio, O. D. Stefano +2 more·Mar 3, 2025
The quantum Rabi model (QRM) is a cornerstone in the study of light-matter interactions within cavity and circuit quantum electrodynamics (QED). It effectively captures the dynamics of a two-level system coupled to a single-mode resonator, serving as...
Imperfect preparation and Trojan attack on the phase modulator in the decoy-state BB84 protocol
Aleksei Reutov·Feb 28, 2025
Quantum key distribution (QKD) provides a theoretically secure method for cryptographic key exchange by leveraging quantum mechanics, but practical implementations face vulnerabilities such as Trojan horse attack on phase modulators. This work analyz...
iSWAP gate with polar molecules: Robustness criteria for entangling operations
Matteo Bergonzoni, Sven Jandura, G. Pupillo·Feb 28, 2025
Ultracold polar molecules in optical lattices or tweezer arrays offer a promising platform for quantum information processing and simulation, thanks to their rich internal structure and long-range dipolar interactions. Recent experimental advances no...
Leveraging Qubit Loss Detection in Fault Tolerant Quantum Algorithms
Gefen Baranes, Madelyn Cain, J. Pablo Bonilla Ataides +5 more·Feb 27, 2025
Qubit loss errors constitute a dominant source of noise in many quantum hardware systems, particularly in neutral atom quantum computers. We develop a theoretical framework to effectively detect and correct loss errors in logical algorithms and lever...
High-Fidelity Integrated Quantum Photonic Logic Via Robust Directional Couplers
Jonatan Piasetzky, Khen Cohen, Yehonatan Drori +4 more·Feb 27, 2025
Scalable quantum information processing with integrated photonics requires quantum logic operations with high fidelity and robustness. Directional couplers, the fundamental elements enabling quantum interference and logic operations, are inherently s...
Linear optical quantum computing with a hybrid squeezed cat code
Shohei Kiryu, Kosuke Fukui, A. Okamoto +1 more·Feb 27, 2025
In recent years, squeezed cat codes with resilience to specific types of loss have been proposed as a step toward realizing fault-tolerant optical quantum computers. However, error correction for squeezed cat codes requires a strong nonlinearity, whi...
On the Interpretability of Neural Network Decoders
Lukas Bödeker, Luc J. B. Kusters, Markus Müller·Feb 27, 2025
Neural‐network (NN) based decoders are becoming increasingly popular in the field of quantum error correction (QEC), including for decoding of state‐of‐the‐art quantum computation experiments. In this work, established interpretability methods are us...
Universal quantum control with dynamical correction
Zhu-yao Jin, Jun Jing·Feb 27, 2025
Error correction is generally demanded in large-scale quantum information processing and quantum computation. We provide here a universal and realtime control strategy to dynamically correct the arbitrary type of errors in the system Hamiltonian. It ...
Shadow measurements for feedback-based quantum optimization
Leticia Bertuzzi, Joao P. Engster, E. C. R. Da Rosa +1 more·Feb 27, 2025
Improving the performance of quantum algorithms is a fundamental task to achieve quantum advantage. In many cases, extracting information from quantum systems poses an important challenge for practical implementations in real-world quantum computers,...
Digital-Analog quantum Rabi simulation in the Deep Strong Coupling Regime
Noureddine Rochdi, Rachid Ahl Laamara, Mohamed Bennai·Feb 26, 2025
We study the quantum Rabi model (QRM) in the deep strong coupling (DSC) regime. To capture the full dynamics of the QRM in the DSC regime, we implemented single-qubit rotations combined with integrated digital steps and qubit-bosonic blocks. This app...