Skip to content

Conversation

@JoelPasvolsky
Copy link
Collaborator

@JoelPasvolsky JoelPasvolsky commented Nov 13, 2025

HTML is here

- :math:`16.7 \pm 1.0\ \text{mK}`

* - :math:`\rm M_{\rm AFM}`: Maximum mutual inductance for qubit pairs
- :math:`2.217\ \text{pH}`

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

mafm needs to be divided by 4, that is my mistake from the QPU properties. should be 0.554. Also, I just looked online and the Adv2 chips should also be divided by 4 ...

Copy link
Collaborator Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@gabrielpl1, is this what you are saying:

  • Advantage2_system1.7: 0.528 (is currently showing as 2.113)
  • Advantage2_system2.1: 0.554 (instead of the 2.217)
  • Advantage2_system4.1: 0.514 (is currently showing as 2.057)
  • Advantage2_research1.3: is currently 0.443 and should stay as is

Copy link
Collaborator Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Implemented in this commit

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I quickly reran a variation on this experiment:
https://docs.dwavequantum.com/en/latest/quantum_research/solver_configuration.html#qpu-config-emulate-with-fbo
Figure 176 and got a qualitatively similar result when using the old MAFM convention.

Using the new MAFM values the gradient associated to flux biases is halved, and the discrepancy becomes much larger. Can we confirm the Hamiltonian for a single qubit where h is the linear bias and fb is the flux_bias, Ip is the persitent current?
H = B(s)/2 h_i - Ip(s) fb_i = MAFM Ip^2 h_i - Ip fb_i ?

Copy link

@gabrielpl1 gabrielpl1 left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Looks good

Copy link

@gabrielpl1 gabrielpl1 left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Thank you Joel!

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

3 participants