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Thread: faster than light communication (obviously I'm mistaken somewhere)

  1. #1 faster than light communication (obviously I'm mistaken somewhere) 
    Forum Sophomore somfooleishfool's Avatar
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    It is my understanding that a Bose Einstein condensate has infinite thermal conductivity. Assuming this to be true, could messages not be passed instantaneously through a Bose Einstein condensate via temperature change?

    PS. My understanding of infinate thermal conductivity is that any heat applyed to the mass in instantly evenly distributed amongst the entire mass.

    Clearly I'm wrong somewhere, I just don't know where, anyone care to help?


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    Administrator KALSTER's Avatar
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    Infinite thermal conductivity means that every part of the BEC (or a superfluid) is of the same temperature, but changes in temperature are still conducted at a finite speed. The mechanism is akin to sound, but is a QM phenomenon. Here is a link explaining the basics: Infinite Thermal Conductivity - Super Fluids


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    Quote Originally Posted by somfooleishfool View Post
    It is my understanding that a Bose Einstein condensate has infinite thermal conductivity. Assuming this to be true, could messages not be passed instantaneously through a Bose Einstein condensate via temperature change?

    PS. My understanding of infinate thermal conductivity is that any heat applyed to the mass in instantly evenly distributed amongst the entire mass.

    Clearly I'm wrong somewhere, I just don't know where, anyone care to help?
    What is your source for the infinite thermal conductivity - I could not find a source. At any rate the transfer of heat clearly could not exceed the speed of light. I assume that this is along the same liines a superconductivity. When it is stated that there is zero resistence in a superconductor that in no way implies that the electricity flows at an infinite speed.
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    Thanks for the source kalster - interesting.
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