Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
CQSA: Byzantine-robust Clustered Quantum Secure Aggregation in Federated Learning
Arnab Nath, Harsh Kasyap·Feb 25, 2026
Federated Learning (FL) enables collaborative model training without sharing raw data. However, shared local model updates remain vulnerable to inference and poisoning attacks. Secure aggregation schemes have been proposed to mitigate these attacks. ...
Random Acceleration Noise on Stern-Gerlach Interferometry in a Harmonic Trap
Sneha Narasimha Moorthy, Andrew Geraci, Sougato Bose +1 more·Feb 24, 2026
We analyze decoherence in a one-loop Stern--Gerlach--type matter-wave interferometer for a massive nanoparticle embedded with a nitrogen vacancy (NV)-centred nanodiamond evolving under an effective harmonic-oscillator dynamics in a magnetic-field gra...
Quantum Approximate Optimization for Decoding of Low-Density Parity-Check Codes
Krishnakanta Barik, Goutam Paul·Feb 24, 2026
Decoding Low-Density Parity-Check (LDPC) codes is a fundamental problem in coding theory, and Belief Propagation (BP) is one of the most popular methods for LDPC code decoding. However, BP may encounter convergence issues and suboptimal performance, ...
Correcting coherent quantum errors by going with the flow
Wayne M. Witzel, Anand Ganti, Tzvetan S. Metodi·Feb 24, 2026
The performance of a given quantum error correction (QEC) code depends upon the noise model that is assumed. Independent Pauli noise, applied after each quantum operation, is a simplistic noise model that is easy to simulate and understand in the con...
Entanglement-Induced Resilience of Quantum Dynamics
Tianfeng Feng, Yue Cao, Wenjun Yu +4 more·Feb 24, 2026
Quantum many-body devices suffer from imperfections that destabilize dynamics and limit scalability. We show that the dynamical growth of entanglement can intrinsically protect generic quantum dynamics against coherent and perturbative noise. Through...
Adversarial Information Gain in Non-ideal Quantum Measurements
Andrés Muñoz-Moller, Leevi Leppäjärvi, Teiko Heinosaari·Feb 24, 2026
Performing a quantum measurement yields two different results: a classical outcome drawn from a probability distribution, according to Born's rule, and a quantum outcome corresponding to the post-measurement state. Quantum devices that provide both o...
Simulating Microwave-Controlled Spin Imaging with Free-Space Electrons
Santiago Beltrán-Romero, Stefan Löffler, Dennis Rätzel +1 more·Feb 24, 2026
Coherent spin resonance techniques, such as nuclear and electron spin resonance spectroscopy, have revolutionized non-invasive imaging by providing spectrally resolved information about spin dynamics. Motivated by the recent emergence of electron mic...
Quantum discord of mixed states under noisy channels in the curved spacetime
Yuxuan Xiong, Zhiling Pi, Tinggui Zhang +1 more·Feb 24, 2026
We focus our attention on two-qubit mixed states as initial states, and apply the geometric measure of quantum discord to investigate quantum discord properties in the background of a Schwarzschild black hole under phase damping, phase flip and bit f...
First- and Second-Order Digital Quantum Simulation of Three-Level Jaynes-Cummings Dynamics on Superconducting Quantum Processors
J. Thirunirai Selvam, S. Saravana Veni, Ria Rushin Joseph·Feb 24, 2026
This work presents a digital quantum simulation of a three-level atomic system interacting with a single-mode electromagnetic field based on the Jaynes-Cummings model, implemented on IBM Quantum superconducting processors. A qutrit is encoded using t...
Quantifying Effective Heterodyne Detection Efficiency with SI-Traceable Standards
Luiz Couto Correa Pinto Filho, Jesper B. Christensen, Anders Brusch +1 more·Feb 23, 2026
Accurate calibration of coherent optical receivers is essential for reliable performance assessment in coherent communications, precision and quantum sensing, and continuous-variable quantum key distribution (CV-QKD), where the effective detection ef...
Time Crystals as Passively Protected Oscillating Qubits
Mert Esencan, A. I. Lvovsky, Berislav Buča·Feb 23, 2026
Protecting information against decoherence in open quantum systems remains a central challenge for quantum computing. In particular, passive error correction schemes have so far been limited to static memories rather than dynamical qubits. We demonst...
Experimental characterization of coherent and non-Markovian errors using tangent space decomposition
Elia Perego, Andrea Rodriguez-Blanco, K. Birgitta Whaley +1 more·Feb 23, 2026
Accurate characterization of coherent and non-Markovian errors remains a central challenge in quantum information processing, as conventional benchmarking techniques typically rely on Markovian and time-independent noise assumptions. In practice, how...
GAP Measures and Wave Function Collapse
Roderich Tumulka·Feb 23, 2026
GAP measures (also known as Scrooge measures) are a natural class of probability distributions on the unit sphere of a Hilbert space that come up in quantum statistical mechanics; for each density matrix $ρ$ there is a unique measure GAP$_ρ$. We desc...
Differentiable Maximum Likelihood Noise Estimation for Quantum Error Correction
Hanyan Cao, Dongyang Feng, Cheng Ye +1 more·Feb 23, 2026
Accurate noise estimation is essential for fault-tolerant quantum computing, as decoding performance depends critically on the fidelity of the circuit-level noise parameters. In this work, we introduce a differentiable Maximum Likelihood Estimation (...
Quantum Reservoir Autoencoder: Conditions, Protocol, and Noise Resilience
Hikaru Wakaura, Taiki Tanimae·Feb 23, 2026
Quantum reservoir computing exploits fixed quantum dynamics and a trainable linear readout to process temporal data, yet reversing the transformation -- reconstructing the input from the reservoir output -- has been considered intractable due to the ...
Curiosity Over Hype: Modeling Motivation Language to Understand Early Outcomes in a Selective Quantum Track
Daniella Alexandra Crysti Vargas Saldana, Freddy Herrera Cueva·Feb 23, 2026
We study whether latent motivation signals in short Spanish admission responses predict engagement and performance in an early quantum computing pathway run by QuantumHub Peru. We analyze N=241 applicants' open responses and link them to outcomes fro...
Spectral Phase Encoding for Quantum Kernel Methods
Pablo Herrero Gómez, Antonio Jimeno Morenilla, David Muñoz-Hernández +1 more·Feb 23, 2026
Quantum kernel methods are promising for near-term quantum ma- chine learning, yet their behavior under data corruption remains insuf- ficiently understood. We analyze how quantum feature constructions degrade under controlled additive noise. We intr...
Characterization and active cancellation of power-line-induced motional-mode frequency noise in a trapped-ion system
Jaehun You, Jiyong Kang, Kyunghye Kim +2 more·Feb 23, 2026
The stability of motional-mode frequency is essential for realizing high-fidelity quantum gates in trapped-ion quantum computing. While broadband Gaussian noise has been extensively studied and mitigated using pulse shaping techniques, the impact of ...
Deterministic Ground State Preparation via Power-Cosine Filtering of Time Evolution Operators
Jeongbin Jo·Feb 23, 2026
The deterministic preparation of quantum many-body ground states is essential for advanced quantum simulation, yet optimal algorithms often require prohibitive hardware resources. Here, we propose a highly efficient, non-variational protocol for grou...
Subsystem Statistics and Conditional Self-Similarity of Random Quantum States
Sangchul Oh·Feb 23, 2026
We analytically derive the bit-string probability distributions of subsystems of random pure states and depolarized random states using the Dirichlet distribution. We identify the exact Beta distribution as the universal statistical law of random qua...