Planning and preparing experimental setup and data analysis for a dilution fridge

Based on color centers in diamond, we will conduct 3D integration of qubit layer, magnetic field and microwave controllers by wafer stacking and monolithic 3D integration. Testing and characterizing such integrated devices are thus crucial for design refinement in development cycles, and subsequent demonstration for the final product.

Project Description:

In this project, we will have access to a dilution fridge, an advanced cooling system for cooling quantum chips to near milli-Kelvin. From there, we test and characterize integrated diamond device, mainly based on tin-vacancy centers. Students working in this project will learn to manage advanced electronic devices, such as arbitrary waveform generator (AWG), micro-controller, time tagger and photodetectors; also, the work will involve writing and uploading pulse sequence to AWG, handling device communication and time gating using micro-controller/ time tagger etc. In addition, students are also expected to work on electrical wires and optical fibers I/O for the dilution fridge.

Ref [1] includes thorough background information of a state-of-the-art dilution fridge setup based on superconducting qubits.

In this project, you will perform the following tasks:

  • You will analyze/cross referencing specifications and propose suitable/compatible experimental setup and sample configuration for testing and characterizing quantum chip in the TNO dilution fridge
  • This can involve and not excluding to, quantum gate fidelity measurement, T1/T2 measurements, running quantum circuits etc
  • Running experiments listed above based on tin-vacancy centers in diamond when required and collecting data
  • Organizing experimental data in a readily accessible format for subsequent data analysis

Students are assumed to have a strong understanding and/or experience in handling electronic equipment. You will also be working closely with PhD student(s) in this project.

[1] Krinner, Sebastian, et al. "Engineering cryogenic setups for 100-qubit scale superconducting circuit systems." EPJ Quantum Technology 6.1 (2019): 2.