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o0_manifold_0o
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Hello there
I love physics, so I normally read a lot of physics books. I am fascinated about BECs and their possible applications. I've read about BECs and BEC vacuum theory, also that is possible to create black holes in superfluids (as BEC) using sound (sonic black holes).
As far as I know (sonic black holes in perfect fluids as BECs) are possible because phonons in perfect fluids exhibit the same properties of motion as fields, such as gravity, in space and time.
And reading Wikipedia I get... In physics, a phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, such as solids and some liquids. Often referred to as a quasiparticle, it represents an excited state in the quantum mechanical quantization of the modes of vibrations of elastic structures of interacting particles. As far as I know... the name phonon is coined because long-wavelength phonons give rise to sound.
So my doubts about this are... that if we need a vacuum chamber (MOT Magneto Optical Trap) and we need phonons to create sonic black holes in a BEC...
are we having "sound inside the BEC" ?
if we have sound, how is it possible that we have sound in a BEC if sound cannot travel in vacuum?
Please, correct me in all you want, I only want to understand this well.
Thanks
I love physics, so I normally read a lot of physics books. I am fascinated about BECs and their possible applications. I've read about BECs and BEC vacuum theory, also that is possible to create black holes in superfluids (as BEC) using sound (sonic black holes).
As far as I know (sonic black holes in perfect fluids as BECs) are possible because phonons in perfect fluids exhibit the same properties of motion as fields, such as gravity, in space and time.
And reading Wikipedia I get... In physics, a phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, such as solids and some liquids. Often referred to as a quasiparticle, it represents an excited state in the quantum mechanical quantization of the modes of vibrations of elastic structures of interacting particles. As far as I know... the name phonon is coined because long-wavelength phonons give rise to sound.
So my doubts about this are... that if we need a vacuum chamber (MOT Magneto Optical Trap) and we need phonons to create sonic black holes in a BEC...
are we having "sound inside the BEC" ?
if we have sound, how is it possible that we have sound in a BEC if sound cannot travel in vacuum?
Please, correct me in all you want, I only want to understand this well.
Thanks
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