+1 vote
asked by (220 points)

Dear community,

How is it possible to implement the conservation of an anti-block structure for {H,U} = 0?

Let us consider for instance the example H = ∑ σˣᵢ + ∑ σˣᵢ σˣⱼ σˣₖ with U = ∏ σˣᵢ where the z-parity only anticommutes with the hamiltonian. Right now I am implementing this using the square of the Hamiltonian, since then [H²,U]=0 and we can use regular quantum numbers; however, this is a very bad solution. Can you think of a better way?

Best,

v.

commented by (46.8k points)
Hi, I'm not sure I'll be able to give a helpful answer to this, but is there any reference you could provide for the concept of an anti-block structure?

Please log in or register to answer this question.

Welcome to ITensor Support Q&A, where you can ask questions and receive answers from other members of the community.

Formatting Tips:
  • To format code, indent by four spaces
  • To format inline LaTeX, surround it by @@ on both sides
  • To format LaTeX on its own line, surround it by $$ above and below
  • For LaTeX, it may be necessary to backslash-escape underscore characters to obtain proper formatting. So for example writing \sum\_i to represent a sum over i.
If you cannot register due to firewall issues (e.g. you cannot see the capcha box) please email Miles Stoudenmire to ask for an account.

To report ITensor bugs, please use the issue tracker.

Categories

...