We've been through this before. A tachyon field has an IMAGINARY mass, not negative mass. That is a very different thing. Complex numbers are an extremely basic math concept, and one which it is very obvious you do not understand. Not understanding the difference between negative and imaginary numbers disqualifies you from making up new physics theories.

Besides the fact that these tachyonic fields are simply a math concept with no evidence at all that tachyons exist. BEC's DO NOT have negative mass. That is a ridiculous statement. There is nothing at all known to have negative mass.

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Polaritons can have negative mass

http://www.newsweek.com/partic…mass-device-lasers-778495

Also see

http://www.rochester.edu/newsc…s-generate-lasers-290202/

Also see

https://en.wikipedia.org/wiki/Negative_mass

Also see

https://www.scientificamerican…faster-than-light-travel/

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Also see

http://www.rochester.edu/newsc…s-generate-lasers-290202/

Also see

https://en.wikipedia.org/wiki/Negative_mass

Also see

https://www.scientificamerican…faster-than-light-travel/

[…]