Costin Iancu

Time-Sharing Redux for Large-Scale HPC Systems

2016

HPC facilities typically use batch scheduling to space-share jobs. In this paper we revisit time-sharing using a trace of over 2.4 million jobs obtained during 20 months of operation of a modern petascale supercomputer. Our …

QFAST: Conflating Search and Numerical Optimization for Scalable Quantum Circuit Synthesis

2021

We present a topology aware quantum synthesis algorithm designed to produce short circuits and to scale well in practice. The main contribution is a novel representation of circuits able to encode placement and topology using …

Accelerating Noisy VQE Optimization with Gaussian Processes

2022 · 2022 IEEE International Conference on Quantum Computing and Engineering (QCE)

Hybrid variational quantum algorithms, which combine a classical optimizer with evaluations on a quantum chip, are the most promising candidates to show quantum advantage on current noisy, intermediate-scale quantum (NISQ) devices. The classical optimizer is …

SlimFit: Memory-Efficient Fine-Tuning of Transformer-based Models Using Training Dynamics

2024

Arash Ardakani, Altan Haan, Shangyin Tan, Doru Thom Popovici, Alvin Cheung, Costin Iancu, Koushik Sen. Proceedings of the 2024 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume …

QTurbo: A Robust and Efficient Compiler for Analog Quantum Simulation

2025 · arXiv (Cornell University)

Analog quantum simulation leverages native hardware dynamics to emulate complex quantum systems with great efficiency by bypassing the quantum circuit abstraction. However, conventional compilation methods for analog simulators are typically labor-intensive, prone to errors, and …