Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Simulation of Quantum Repeater Networks under Decoherence and Purification Constraints
Wenhan Li, Shiyu Zhang·Oct 8, 2025
Long-distance quantum communication requires reliable entanglement distribution, but direct generation with protocols such as Barrett--Kok suffers from exponentially decreasing success probability with distance, making it impractical over hundreds of...
When quantum resources backfire: Non-gaussianity and symplectic coherence in noisy bosonic circuits
Varun Upreti, Ulysse Chabaud, Zoë Holmes +1 more·Oct 8, 2025
Analyzing the impact of noise is of fundamental importance to understand the advantages provided by quantum systems. While the classical simulability of noisy discrete-variable systems is increasingly well understood, noisy bosonic circuits are more ...
Fundamental Costs of Noise-Robust Quantum Control: Speed Limits and Complexity
Junkai Zeng, Xiu-Hao Deng·Oct 8, 2025
Noise is ubiquitous in quantum systems and is a major obstacle for the advancement of quantum information science. Noise-robust quantum control achieves high-fidelity operations by engineering the evolution path so that first-order noise contribution...
Entangling remote qubits through a two-mode squeezed reservoir
A. Andrés-Juanes, J. Agustí, R. Sett +5 more·Oct 8, 2025
The distribution of entanglement across distant qubits is a central challenge for the operation of scalable quantum computers and large-scale quantum networks. Existing approaches rely on deterministic state transfer schemes or probabilistic protocol...
Experimental demonstration of genuine quantum information transmission through completely depolarizing channels in a superposition of cyclic orders
Yaxin Wang, Linxiang Zhou, Tianfeng Feng +6 more·Oct 8, 2025
A major challenge in quantum communication is addressing the negative effects of noise on channel capacity, especially for completely depolarizing channels, where information transmission is inherently impossible. The concept of indefinite causal ord...
Realistic Threat Models for Fiber and Free-Space Continuous-Variable Quantum Key Distribution
Zhiyue Zuo, Masoud Ghalaii, Stefano Pirandola·Oct 8, 2025
Future global quantum communication networks, or quantum Internet, will realize high-rate secure communication and entanglement distribution for large-scale users over long distances. Continuous variable (CV) quantum key distribution (QKD) provides a...
Constant-Overhead Addressable Gates via Single-Shot Code Switching
Louis Golowich, Kathleen Chang, Guanyu Zhu·Oct 8, 2025
It is a major challenge to perform addressable and parallel logical operations on constant-rate quantum LDPC (qLDPC) codes. Indeed, the overhead of targeting specific logical qubits represents a crucial bottleneck in many quantum fault-tolerance sche...
Fast-forwardable Lindbladians imply quantum phase estimation
Zhong-Xia Shang, Naixu Guo, Patrick Rebentrost +3 more·Oct 8, 2025
Quantum phase estimation (QPE) and Lindbladian dynamics are both foundational in quantum information science and central to quantum algorithm design. In this work, we bridge these two concepts: certain simple Lindbladian processes can be adapted to p...
Layer codes as partially self-correcting quantum memories
Shouzhen Gu, Libor Caha, Shin Ho Choe +3 more·Oct 8, 2025
We investigate layer codes, a family of three-dimensional stabilizer codes that can achieve optimal scaling of code parameters and a polynomial energy barrier, as candidates for self-correcting quantum memories. First, we introduce two decoding algor...
Postselected amplification and photon recycling applied to optical sensing of magnetic fields
Yazhi Niu, Jialin Li, Lupei Qin +1 more·Oct 8, 2025
We apply the combined technique of postselected amplification and photon-recycling to an optical setup of magnetic field precision measurement. We propose two recycling schemes and carry out analytic expressions for the amplified signal and measureme...
Optimal filtering and generation of entangled photons for quantum applications in the presence of noise
Jordan M. Thomas, Andrew R. Cameron, Akil Pathiranage +6 more·Oct 8, 2025
Filtering is commonly used in quantum optics to reject noise photons, and also to enable interference between independent photons. However, filtering the joint spectrum of photon pairs can reduce the inherent coincidence probability or loss-independe...
Stochastic interpretation of quantum mechanics
Mário J. de Oliveira·Oct 7, 2025
We express the probabilistic character associated to the wave function by treating it as a stochastic variable. This is accomplished by means of a stochastic equation for the wave function whose noise changes the phase of the wave function but not it...
Fourier Spectrum of Noisy Quantum Algorithms
Uma Girish·Oct 7, 2025
Quantum computing promises exponential speedups for certain problems, yet fully universal quantum computers remain out of reach and near-term devices are inherently noisy. Motivated by this, we study noisy quantum algorithms and the landscape between...
Harnessing Environmental Noise for Quantum Energy Storage
Borhan Ahmadi, Aravinth Balaji Ravichandran, Paweł Mazurek +2 more·Oct 7, 2025
Quantum hardware increasingly relies on energy reserves that can later be converted into useful work; yet, most battery-like proposals demand coherent drives or engineered non-equilibrium resources, limiting practicality in noisy settings. We develop...
Limitations of Noisy Geometrically Local Quantum Circuits
Jon Nelson, Joel Rajakumar, Michael J. Gullans·Oct 7, 2025
It has been known for almost 30 years that quantum circuits with interspersed depolarizing noise converge to the uniform distribution at $ω(\log n)$ depth, where $n$ is the number of qubits, making them classically simulable. We show that under the r...
Classical simulation of noisy random circuits from exponential decay of correlation
Su-un Lee, Soumik Ghosh, Changhun Oh +3 more·Oct 7, 2025
We study the classical simulability of noisy random quantum circuits under general noise models. While various classical algorithms for simulating noisy random circuits have been proposed, many of them rely on the anticoncentration property, which ca...
Classically Sampling Noisy Quantum Circuits in Quasi-Polynomial Time under Approximate Markovianity
Yifan F. Zhang, Su-un Lee, Liang Jiang +1 more·Oct 7, 2025
While quantum computing can accomplish tasks that are classically intractable, the presence of noise may destroy this advantage in the absence of fault tolerance. In this work, we present a classical algorithm that runs in $n^{\rm{polylog}(n)}$ time ...
An integrated photonic millimeter-wave receiver with sub-ambient noise
Junyin Zhang, Shuhang Zheng, Jiachen Cai +6 more·Oct 7, 2025
Decades of progress in radiofrequency (RF) transistors and receiver frontends have profoundly impacted wireless communications, remote sensing, navigation, and instrumentation. Growing demands for data throughput in 6G networks, timing precision in p...
Anchor: Reducing Temporal and Spatial Output Performance Variability on Quantum Computers
Yuqian Huo, Daniel Leeds, Jason Ludmir +2 more·Oct 7, 2025
Quantum computing, which has the power to accelerate many computing applications, is currently a technology under development. As a result, the existing noisy intermediate-scale quantum (NISQ) computers suffer from different hardware noise effects, w...
Quantum Strategies to Overcome Classical Multiplexing Limits
Tzula B. Propp, Jeroen Grimbergen, Emil R. Hellebek +5 more·Oct 7, 2025
Near-term quantum networks face a bottleneck due to low quantum communication rates. This degrades performance both by lowering operating speeds and increasing qubit storage time in noisy memories, making some quantum internet applications infeasible...