Close

Filter courses

Show courses Show filters
Close

Germanium Quantum Technology

01 /What can CMOS technology do for quantum computing? 02 /Semiconductor devices and scaling with industrial approach 03 /Semiconductor foundry facilities: the good and the bad for qubits 04 /IMEC's latest qubit developments 05 /Summary and outlook 06 /Semiconductors for spin qubits 07 /Germanium quantum wells on silicon 08 /Germanium quantum wells on silicon-germanium 09 /Growth methods 10 /Characterization techniques 11 /Electrical characterization of germanium quantum wells 12 /Fabrication of H-FET 13 /Semiconductor qubits: vision and challenges 14 /Quantum materials 15 /Quantum dot qubits and their operation 16 /Types of quantum dot qubits 17 /Qubit Readout 18 /Qubit Control 19 /Qubit Coherence and Fidelity 20 /Multi-qubit control and quantum algorithms 21 /Quantum links and scaling 22 /Physics of holes 23 /Hole spin qubits 24 /Introduction to electronics for quantum computing 25 /Room temperature electronics 26 /Cryogenic qubit chip carriers 27 /Contribution to IGNITE 28 /Quantum Control Stack for Spin Qubits 29 /Auto-tuning a quantum computer 30 /Tuning and operation of arrays 31 /Finding operation points example 32 /What is auto-tuning? 33 /Neural network tuning 34 /Navigating charge stability diagrams 35 /Experimental implementation 36 /Towards universal quantum algorithms 37 /Classical error correction 38 /Quantum error correction 39 /Progress and challenges 40 /Introduction to quantum algorithms 41 /The first algorithms 42 /Quantum annealing 43 /Quantum Machine Learning

Quantum links and scaling

In this video, Menno presents different strategies to scale up quantum systems.

Main takeaways

  • Shuttling operations for short and mid-range quantum links to increase qubit connectivity.
  • Two shuttling modes: conveyor mode and bucket brigade mode.
  • The spin-orbit interaction induced different quantization axis in germanium gives rise to shuttling induced qubit rotations with diabatic qubit transfer. These oscillations are at the Larmor frequency of the qubit.
  • Coherent qubit shuttling in Germanium needs careful times optimisation to mitigate unintended qubit rotations.
  • Coherent shuttling in germanium is limited by dephasing process, it can be improved by implementing Hahn echo sequences.

Further thinking

True or False: The shuttling induced oscillations can be mitigated with precise time control in each dot.

Solution

Further reading

Shuttling through germanium quantum dots https://arxiv.org/abs/2308.02406