CV

Available as a PDF here.

---

Education

• Ph.D in Physics, Stanford University, June 2024
• M.S. in Physics, Stanford University, Jan. 2019
• B.A. in Physics & Mathematics, Clark University, Dec. 2016

Experience (Click to expand)

August 2024 - present: Technical Staff, MIT Lincoln Laboratory

• Technical Staff in Group 89 working on superconducting devices. Email: Logan.Bishop-VanHorn@ll.mit.edu.

September 2017 - January 2019, January 2021 - June 2024: Graduate Student, Stanford University

• Department of Physics, Stanford University, Stanford, CA. Advisor: Kam Moler.
• Developed open-source tools for London-Maxwell [superscreen.rtfd.io] and time-dependent Ginzburg-Landau (TDGL) [py-tdgl.rtfd.io] modeling of two-dimensional superconductors with arbitrary geometry.
• Constructed and optimized a cryogen-free variable temperature scanning SQUID microscope.
• Implemented digital flux feedback for SQUID readout using FPGAs.
• Publications from this period:
  • Vortex dynamics induced by scanning SQUID susceptometry, Physical Review B (2023).
  • pyTDGL: Time-dependent Ginzburg-Landau in Python, Computer Physics Communications (2023), Python package: https://py-tdgl.readthedocs.io/.
  • Local imaging of diamagnetism in proximity-coupled niobium nanoisland arrays on gold thin films, Physical Review B (2022) (Editors’ suggestion).
  • SuperScreen: An open-source package for simulating the magnetic response of two-dimensional superconducting devices, Computer Physics Communications (2022). Python package: https://superscreen.readthedocs.io/
  • Cryogen-free variable temperature scanning SQUID microscope, Review of Scientific Instruments (2019).
  • Imaging anisotropic vortex dynamics in FeSe, Physical Review B (2019).

January 2019 - January 2021: Research Associate, Quantum Circuits, Inc.

• Quantum Circuits, Inc. (QCI), New Haven, CT. Supervisors: Harvey Moseley, Rob Schoelkopf.
• Characterization and modeling of superconducting devices for quantum information processing using qubits encoded in microwave cavities.
• Deliverables from this period:
  • SeQuencing, an open-source Python package for simulating the dynamics of open quantum systems under realistic pulse sequences.
  • qascade, a (closed-source) Python package for estimating noise photon numbers at all stages of a quantum control microwave signal chain based on measured or simulated RF and thermal properties of microwave components.

Summer 2016: Undergraduate Research Assistant, Cornell University

• Cornell Center for Materials Research, Cornell University, Ithaca, NY. Advisor: Dan Ralph.
• Performed RF measurements and micromagnetic modeling of magnetic heterostructures for spintronics.
• Deliverables from this period:
  • Exploring Low-Frequency ST-FMR: Simulation and Experiment [report, slides]

June 2014 - December 2016: Undergraduate Research Assistant, Clark University

• Department of Physics, Clark University, Worcester, MA. Advisor: Charles Agosta.
• Measured the RF penetration depth of unconventional superconductors at high magnetic fields using tunnel diode oscillators.

Skills (Click to expand)

Low temperature and condensed matter physics

• Cryogenic scanning probe microscopy of quantum materials and devices
• Electromagnetic modeling of superconducting devices
• Operation of cryogen-free dilution refrigerators
• Instrument control and measurement automation

Quantum computing

• Automating the characterization and calibration of superconducting qubits and cavities
• Modeling dynamics of open quantum systems (QuTiP, SeQuencing)
• Dynamical decoupling noise spectroscopy
• Software and RF electronics for quantum control

Scientific programming

• Scientific Python (numpy, scipy, matplotlib, pandas, JAX, CuPy, …)
• MATLAB
• HFSS, Sonnet
• Bash, Git, and GitHub
• Interfacing with HPC (Slurm, Ray, MPI)

Publications

Characterization of Two Fast-Turnaround Dry Dilution Refrigerators for Scanning Probe Microscopy

Mark E. Barber, Yifan Li, Jared Gibson, Jiachen Yu, Zhanzhi Jiang, Yuwen Hu, Zhurun Ji, Nabhanila Nandi, Jesse C. Hoke, Logan Bishop-Van Horn, Gilbert R. Arias, Dale J. Van Harlingen, Kathryn A. Moler, Zhi-Xun Shen, Angela Kou, and Benjamin E. Feldman "Characterization of Two Fast-Turnaround Dry Dilution Refrigerators for Scanning Probe Microscopy", Journal of Low Temperature Physics 215, 1-23 (2024).

Vortex dynamics induced by scanning SQUID susceptometry

Logan Bishop-Van Horn*, Eli Mueller*, and Kathryn A. Moler, "Vortex dynamics induced by scanning SQUID susceptometry ", Phys. Rev. B 107, 224509 (2023).

pyTDGL: Time-dependent Ginzburg-Landau in Python

Logan Bishop-Van Horn, "pyTDGL: Time-dependent Ginzburg-Landau in Python", Computer Physics Communications Volume 291, October 2023, 108799.

Local imaging of diamagnetism in proximity-coupled niobium nanoisland arrays on gold thin films

Logan Bishop-Van Horn*, Irene P. Zhang*, Emily N. Waite, Ian Mondragon-Shem, Scott Jensen, Junseok Oh, Tom Lippman, Malcolm Durkin, Taylor L. Hughes, Nadya Mason, Kathryn A. Moler, and Ilya Sochnikov, "Local imaging of diamagnetism in proximity-coupled niobium nanoisland arrays on gold thin films", Phys. Rev. B 106, 054521 (2022) (Editors' Suggestion).

SuperScreen: An open-source package for simulating the magnetic response of two-dimensional superconducting devices

Logan Bishop-Van Horn and Kathryn A. Moler , "SuperScreen: An open-source package for simulating the magnetic response of two-dimensional superconducting devices", Computer Physics Communications Volume 280, November 2022, 108464.

Imaging anisotropic vortex dynamics in FeSe

Irene P. Zhang, Johanna C. Palmstrom, Hilary Noad, Logan Bishop-Van Horn, Yusuke Iguchi, Zheng Cui, Eli Mueller, John R. Kirtley, Ian R. Fisher, and Kathryn A. Moler, "Imaging anisotropic vortex dynamics in FeSe", Phys. Rev. B 100, 024514 (2019).

Cryogen-free variable temperature scanning SQUID microscope

Logan Bishop-Van Horn, Zheng Cui, John R. Kirtley, and Kathryn A. Moler , "Cryogen-free variable temperature scanning SQUID microscope", Review of Scientific Instruments 90, 063705 (2019).

The signature of inhomogeneous superconductivity

Charles C. Agosta, Logan Bishop-Van Horn, Max Newman, "The Signature of Inhomogeneous Superconductivity", Journal of Low Temperature Physics 185, 220–229 (2016).

Talks

Vortex dynamics induced by scanning SQUID susceptometry

March 07, 2023

Talk at APS March Meeting 2023, Las Vegas, Nevada

Simulating the static magnetic response of thin film superconducting devices

March 14, 2022

Talk at APS March Meeting 2022, Chicago, Illinois (presented remotely)

Designing, making, imaging, and modeling landscapes of superfluid density in two-dimensional superconductors

February 15, 2022

Talk at Energy Frontier Research Center Quantum Sensing and Quantum Materials (QSQM) Research Symposium, Virtual

Quantum sensing with superconducting qubits

September 21, 2021

Talk at Energy Frontier Research Center Quantum Sensing and Quantum Materials (QSQM) Research Symposium, Virtual

Cryogen-free variable temperature scanning SQUID microscope

March 05, 2019

Talk at APS March Meeting 2019, Boston, Massachusetts

New details in the superconducting phase diagram of λ-(BETS)₂GaCl₄

March 14, 2017

Talk at APS March Meeting 2017, New Orleans, Louisiana

Teaching

Teaching Assistant, Physics 22 (Autumn 2022)

Teaching Assistant, Physics 67 (Spring 2022)

CAMPARE Graduate Student Mentor (Summer 2018)

Teaching Assistant, Physics 43 (Spring 2018)