# ferromagnetism in 1D chain

**URL:** <https://itensor.discourse.group/t/ferromagnetism-in-1d-chain/522>\
**Category:** DMRG and Numerical Methods\
**Tags:** dmrg\
**Created:** [November 21, 2022, 9:22am UTC](https://itensor.discourse.group/t/ferromagnetism-in-1d-chain/522 "2022-11-21T09:22:27Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Vladimir](https://avatars.discourse-cdn.com/v4/letter/v/94ad74/32.png) [@Vladimir](https://itensor.discourse.group/u/Vladimir)\
**Post date:** [November 21, 2022, 11:10am UTC](https://itensor.discourse.group/t/ferromagnetism-in-1d-chain/522/2 "2022-11-21T11:10:22Z")

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We’ve just discussed a very similar situation in another thread, [here’s](https://itensor.discourse.group/t/to-increase-accuracy-of-dmrg-code/501/10) what I think is going on.

tl; dr: you may be finding the exact ground state, which never breaks symmetry in a finite system.

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