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Project Overview

Project Code: NAT 14

Project name:

Design of long range tunable couplers for Superconducting quantum circuits

TUM Department:

NAT - Physics

TUM Chair / Institute:

E23 - Prof. Stefan Filipp

Research area:

Quantum Computing

Student background:

Physics

Further disciplines:

Participation also possible online only:

Planned project location:

Walther-Meißner-Institute

Project Supervisor - Contact Details


Title:

Given name:

Anirban

Family name:

Bhattacharjee

E-mail:

anirban.bhattacharjee@tum.de

Phone:

+49 (0)89 289 14202

Additional Project Supervisor - Contact Details


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E-mail:

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Additional Project Supervisor - Contact Details


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Project Description


Project description:

Project Background:
Tunable couplers are integral components in quantum chips needed for scalable quantum computing. These couplers mediate the coupling between multiple qubits and allow dynamic control over their interaction strength. However, the state-of-the-art designs of these couplers are limited to nearest neighbour (NN) connectivity which often limits implementing direct gates between distant qubits. This is a critical bottleneck in scaling up as it requires dense routing of control lines which grows with the number of qubits, often reducing the performance of gates due to crosstalk. It also becomes problematic to implement novel error correction protocols that promise lower physical qubit overhead but rely on non-local interaction. Hence, we look for coupler designs which enables long range connectivity between qubits either on-chip or even separated into different chips. It becomes more practical upon combining these designs with 3D integration techniques such as flip chip bonding and through-silicon-vias (TSVs).


Project Description:
We are offering a 2-month internship project focused on design and simulation of long range tunable couplers for superconducting qubits. The intern will help in designing new coupler designs using our design tools with the goal of achieving optimal coupling strength required for two-qubit gates.


Tasks:
• Design tunable long range couplers in our Klayout bases Python design software.
• Simulate the design structures in ANSYS Maxwell/ HFSS.
• Combine extracted coupling parameters from these simulations with Scqubits to model the circuit parameters.


Expected Outcomes:
• The intern will gain insights in the fundamentals of tunable couplers required in superconducting circuits.
• Gaining experience in working with design tools and simulation softwares.
• Exposure to concepts of scalable design architectures e.g., 3D integration.

Working hours per week planned:

40

Prerequisites


Required study level minimum (at time of TUM PREP project start):

3 years of bachelor studies completed

Subject related:

• Background in Physics/Engineering
• Familiarity with basic concepts of superconducting quantum circuits.
• Coding skills using Python
• Prior use of KLayout or Ansys is an added plus.

Other:

  • Keine Stichwörter