7 papers
Design-Time Conformance Checking for Pulse-Level Quantum Control
Rylan Malarchick
A pulse-level quantum control program is written against a device whose limits are recorded, if at all, in vendor documentation and source code. A program that exceeds them can be…
The verifier side of speculative window decoding: a predictability bracket, a machine-checked blast-radius bound, and a decoder-agnostic recover loop
Rylan Malarchick
Speculative window decoders hide quantum error-correction decoder latency by guessing the cross-boundary decisions that link adjacent decoding windows, running downstream work on t…
Measuring Control-Plane Openness in Near-Term Quantum Computing: A Rubric, Its Validation, and an Application to Thirteen Vendor Stacks
Rylan Malarchick
Public access to pulse-level and control-electronics interfaces in commercial quantum computing has bifurcated. This paper proposes a six-axis rubric for measuring control-plane op…
Hardware-Aware Performance Characterization of Small Dense Lindblad Propagation for Near-Term Quantum Control
Rylan Malarchick
Dense Lindblad propagation at the Hilbert-space sizes of near-term transmon control (, , ) sits in a regime where cache boundaries, launch overhead, and fixed latency…
Parallelizing the Variational Quantum Eigensolver: From JIT Compilation to Multi-GPU Scaling
Rylan Malarchick, Ashton Steed
The Variational Quantum Eigensolver (VQE) is a hybrid quantum-classical algorithm for ground-state energies of molecular systems. We compute the potential energy surface of the hyd…
End-to-End Fidelity Analysis of Quantum Circuit Optimization: From Gate-Level Transformations to Pulse-Level Control
Rylan Malarchick
We present an analysis of quantum circuit fidelity across the full compilation stack, from high-level gate optimization through pulse-level control. We connect a C++ circuit optimi…
When does numerical pulse optimization actually help? Error budgets,robustness tradeoffs, and calibration guidance for transmon single-qubit gates
Rylan Malarchick
Numerical optimal control (GRAPE) can in principle discover pulse shapes that suppress all coherent gate error to machine precision. But when does that capability actually matter?…