Hello,
My name is
Christopher
Ewasiuk
ML @ Vinci  ·  PhD Computational Physicist  ·  AI for Physics
Currently
Member of Technical Staff — Vinci ↗
ML team · AI for physics simulation
PhD, UC Santa Cruz (2026)
8
Publications
5
First Author
5+
Years of Research
3
Institutions
👤 About

I'm a Member of Technical Staff on the ML team at Vinci, working on AI for physics simulation.

I came to this work through a PhD in computational physics at UC Santa Cruz, where I specialized in black hole dynamics and gravitational waves. Across 7 publications, 5 first-author in Physical Review D, JHEP, and JCAP, collaborations at ADMX and Fermilab, and end-to-end research pipelines, my work kept coming back to the same core question: where do models break down, and how do you build systems that tell you honestly when they are?

That meant building matched filtering pipelines across multi-terabyte datasets, evaluation systems that characterize failure modes across thousands of noise realizations, and simulation tools that push existing codebases into physical regimes they were never designed to handle.

Outside physics: I won top project at the Erdős Institute among ~200 PhD candidates — a 3D deep learning pipeline for MRI brain tumor segmentation from scratch. Dice = 0.83, 86% precision on held-out data.

⚛️ AI for Physics · Vinci ↗
📡 Signal Detection
🌌 Gravitational Waves
🧠 Deep Learning
⚙️ Eval Pipelines
🔬 ADMX · Fermilab
Christopher Ewasiuk
🛠 Skills
🔥
PyTorch
🧠
3D U-Net
👁️
CNNs / ResNet
⚖️
Bayesian Inference
📐
Physics-Informed ML
🎯
Model Evaluation
📡
Matched Filtering
〰️
PSD Estimation
🔊
Noise Characterization
📡
PyCBC
🧮
FFTW
🔬
Monte Carlo
📉
ODE Solvers
🗺️
Parameter Sweeps
🔄
Simulation Pipelines
🐍
Python
⚡
C / C++
📊
NumPy / SciPy
🐼
Pandas
🗄️
HDF5
🔗
Git / Linux
📝
LaTeX
🖥 Projects
Signal Processing · ADMX · SLAC
Gravitational Wave Detection Pipeline
End-to-end signal analysis and ML classification system for searching gravitational waves via resonant microwave cavity detectors, combining a matched filter pipeline with a gradient-boosted classifier to recover sub-threshold candidates and reject RFI false positives.
  • Matched filtering across multi-terabyte experimental datasets with FFT binning, Welch PSD estimation, robust stacking, and receiver calibration
  • Synthetic injection pipeline generating thousands of noise realizations across SNR for stress-testing models
⚫
🕳️
Simulation · Physical Review D
BlackHawk Extension: Black Hole Simulation Framework
Extended a widely-used open-source codebase into a physical regime it was never designed for — the first computational framework of its kind for charged, spinning black hole evolution.
  • Overhauled core dynamics to model charge depletion, covering spin evolution and time evolution of charged configurations
  • ODE solvers, parameter sweeps, interpolation across physically motivated initial conditions
  • Results published first-author in Physical Review D
★ Top Project — Erdős Institute (~200 PhDs)
Deep Learning · PyTorch
3D Brain Tumor Segmentation 🧠
End-to-end volumetric MRI segmentation pipeline built entirely from scratch. Dice = 0.83, 86% precision on held-out data across 500 patients and 4 MRI modalities.
  • Composite BCE + Dice loss to handle severe class imbalance between tumor and non-tumor regions
  • GPU-accelerated 3D U-Net architecture
  • Full pipeline: data ingestion → training → threshold optimization → inference evaluation
Quantum Theory · arXiv 2026
Ghost Stability — Exact Operator Conservation 👻
Proved a rigorous quantum stability result for ghost-coupled systems, showing instabilities are not kinematically inevitable but depend on whether dynamics allow uncontrolled energy transfer.
  • Exact conservation law: classical conserved quantity lifts to a quantum operator commuting with the Hamiltonian, with no ℏ corrections
  • Rigorous, state-independent upper bound on mean-squared phase-space radius for all time
  • Three independent numerical frameworks (Heisenberg, Schrödinger, Fock-space) confirm wavepacket confinement below the analytic bound
📄 Publications
2026
PhD Thesis
Black Holes as Precision Probes of Dark Sectors and Fundamental Physics
C. Ewasiuk · Advisor: S. Profumo
PhD Dissertation, UC Santa Cruz (2026) · eScholarship
2026
1st Author
Ghost Degrees of Freedom Without Quantum Runaway: Exact Moment Bounds from an Operator Conservation Law
C. Ewasiuk, S. Profumo
arXiv:2604.21348 [quant-ph]
2026
1st Author
Quantum Tunneling of Primordial Black Holes to White Holes: Rates, Constraints, and Implications for Fast Radio Bursts
C. Ewasiuk, S. Profumo
JCAP 09 (2026) 132 · arXiv:2603.22516
2026
High-Frequency Gravitational Wave Transients from Superradiance
H. Su, L. Brown, C. Ewasiuk, S. Profumo
JCAP 09 (2026) 143 · arXiv:2604.01407
2025
1st Author
Precision Gravity Constraints on Large Dark Sectors
C. Ewasiuk, S. Profumo
JHEP 10 (2025) 0925 · arXiv:2509.02801
2025
1st Author
Dark-Sector Modifications to Kerr and Reissner–Nordström Black Hole Evaporation
C. Ewasiuk, S. Profumo
Phys. Rev. D 111 (2025) 015008 · arXiv:2505.04812
2025
Maximal Gravitational Wave Signal from Asteroid-Mass Primordial Black Hole Mergers at Resonant Microwave Cavities
S. Profumo, L. Brown, C. Ewasiuk, S. Ricarte, H. Su
Phys. Rev. D 111 (2025) 063072 · arXiv:2410.15400
2025
1st Author
Constraints on the Maximal Number of Dark Degrees of Freedom from Black Hole Evaporation, Cosmic Rays, Colliders, and Supernovae
C. Ewasiuk, S. Profumo
Phys. Rev. D 111 (2025) 015008 · arXiv:2409.11359
✉️ Contact

I'm currently a Member of Technical Staff on the ML team at Vinci, building AI for physics simulation. PhD in computational physics from UC Santa Cruz (2026).

Always happy to talk about AI for science, evaluation infrastructure, and ML systems — or black holes. Email is the best way to reach me.

↓ Download Resume