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\nI will show how one can translate between the macroscopic two-fluid model and a microscopic field theoretic description \, using the simplest field theory that can show Bose-Einstein condensatio n\, namely the complex scalar field.

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\nQuestions that will be ans wered include:\n

* How can one get two fluids from a single field?

\n* What is the relationship between the different formalisms that have be en proposed for relativistic superfluids?

\n* What is the role of the Goldstone boson? DTSTART:20130130T203000Z LOCATION:Physics Building\, Room 204 SUMMARY:How to understand superfluids using field theory END:VEVENT END:VCALENDAR