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Qian Lou

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Preprint Sep 2026

Memory-Efficient Designs for Word-Wise Universal Fully Homomorphic Encryption

Fully Homomorphic Encryption (FHE) enables computation on encrypted data, preserving privacy throughout analysis. While its privacy is very strong, FHE is much slower to execute than the original computation. In particular, due to the recent success in accelerating its compute, the performance bottleneck shifts to the...

A. W. B. Yudha, Erwin Eko Wahyudi, R. Rajagede et al. · 0 citations
#artificial intelligence Preprint Aug 2026

Learning What to Retain: Gated-Memory Routing for Efficient Collaboration in Multi-Agent LLM Systems

Gated-Memory Routing is proposed, which conditions each decision on the query and a learned execution memory, and attains the best average accuracy, exceeding the strongest baseline by 2.44 points, while reducing HumanEval inference cost by 31.9% relative to that baseline.

Rakibul Hasan Rajib, Meng Zheng, Qian Lou · 2 citations
Jul 2026

Hardware Robustness of Sample-Based Quantum Diagonalization

This work analyzes SQD robustness on IBM Heron hardware across shot budgets, layouts, noise mitigation settings, and coupled-cluster singles and doubles amplitudes to identify where SQD provides genuine deployment robustness and where its limits remain.

Ahatesham Bhuiyan, Cheng Chu, Qian Lou et al. · 1 citation
Jul 2026

CutBackdoor: A Circuit Cut Triggered Backdoor Attack on Variational Quantum Algorithms

CutBackdoor is presented, the first parameter-supply-chain backdoor that uses cut circuit execution from CutQC as the deployment-time trigger against VQAs, and poisoned parameters preserve full-circuit validation performance while substantially increasing cut-path reconstruction error under noisy finite-shot circuit-cu...

Ahatesham Bhuiyan, Hoang M. Ngo, Cheng Chu et al. · 0 citations
Jul 2026

SoK: Adversarial Robustness of the Variational Quantum Eigensolver via Red-Teaming

Noise-induced attacks that manipulate the Zero-Noise Extrapolation pipeline are the most damaging, followed by the QTrojan circuit-level backdoor, while the QDoor parameter-level backdoor is the least effective, yielding only marginal amplification.

Ahmed Azaz Humdoon, Cheng Chu, Lei Jiang et al. · 0 citations
Jan 2026

Learning Latency-Aware Orchestration for Multi-Agent Systems

LAMaS is a latency-aware orchestration framework for learning-based multi-agent systems that achieves the best latency among evaluated learning-based MAS baselines, reducing end-to-end latency by over 50% while maintaining competitive or better accuracy.

Xi Shi, Meng Zheng, Qian Lou · 2 citations · ⚡1
Preprint Aug 2026

Conjunctive Poisoning in AI Supply-Chain Applications

This work shows that a malicious developer can pair a benign-looking wrapper with crafted metadata to deterministically alter post-generation behavior without modifying model weights, training data, or inference backend, and introduces TIF-BAH, a lightweight middleware defense that verifies wrapper integrity and record...

Nokimul Hasan Arif, Qian Lou, Meng Zheng · 0 citations

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