Contents

# Contents

## Idea

In Yang-Mills theory on 4d Minkowski spacetime the theta vacuum is a vacuum state which is a superposition of each Yang-Mills instanton-sector weighted by a complex phase proportional to the theta angle times the instanton number.

## References

Survey is in

Detailed argument for the theta vacuum from chiral symmetry breaking is offered in

Last revised on February 8, 2020 at 05:51:29. See the history of this page for a list of all contributions to it.