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Cosmology With Negative Absolute Temperatures
Cosmology With Negative Absolute Temperatures
What do you mean T<0
What do you mean T<0
What do you mean T<0
What do you mean T<0
What do you mean T<0
What do you mean T<0
What do you mean T<0
What do you mean T<0
What do you mean T<0
What do you mean T<0
Some landmarks in NAT
Some landmarks in NAT
Some landmarks in NAT
Some landmarks in NAT
Some landmarks in NAT
Some landmarks in NAT
Some landmarks in NAT
Some landmarks in NAT
Why do we care
Why do we care
Cosmology with an energy cut-off
Cosmology with an energy cut-off
Making use of holes
Making use of holes
Making use of holes
Making use of holes
Making use of holes
Making use of holes
Making use of holes
Making use of holes
Making use of holes
Making use of holes
Hole dynamics
Hole dynamics
Full of holes
Full of holes
Full of holes
Full of holes
If a component of the Universe is allowed to be at T<0: accelerated
If a component of the Universe is allowed to be at T<0: accelerated
In Conclusion
In Conclusion
In Conclusion
In Conclusion
In Conclusion
In Conclusion
The End
The End
Cosmology with an energy cut-off
Cosmology with an energy cut-off
Thermodynamic Formulas
Thermodynamic Formulas
Thermodynamic Formulas
Thermodynamic Formulas
Gibbs-Hertz Entropy
Gibbs-Hertz Entropy

Презентация: «Cosmology With Negative Absolute Temperatures». Автор: JPedro. Файл: «Cosmology With Negative Absolute Temperatures.ppt». Размер zip-архива: 1096 КБ.

Cosmology With Negative Absolute Temperatures

содержание презентации «Cosmology With Negative Absolute Temperatures.ppt»
СлайдТекст
1 Cosmology With Negative Absolute Temperatures

Cosmology With Negative Absolute Temperatures

Jos? P. P. Vieira

COSMO 15

11th September 2015

2 What do you mean T<0

What do you mean T<0

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J. P. P. Vieira

3 What do you mean T<0

What do you mean T<0

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J. P. P. Vieira

4 What do you mean T<0

What do you mean T<0

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J. P. P. Vieira

5 What do you mean T<0

What do you mean T<0

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6 What do you mean T<0

What do you mean T<0

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7 Some landmarks in NAT

Some landmarks in NAT

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8 Some landmarks in NAT

Some landmarks in NAT

1951 – LiF at -1K

Purcell & Pound, Phys. Rev., 81:279-280

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9 Some landmarks in NAT

Some landmarks in NAT

1951 – LiF at -1K 1956 – Theoretical framework

Purcell & Pound, Phys. Rev., 81:279-280

Ramsay, Phys. Rev., 103:20-28

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10 Some landmarks in NAT

Some landmarks in NAT

1951 – LiF at -1K 1956 – Theoretical framework 2012 – T<0 with motional degrees of freedom

Purcell & Pound, Phys. Rev., 81:279-280

Ramsay, Phys. Rev., 103:20-28

Braun et al, Science 339(6115)

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11 Why do we care

Why do we care

Inflation?

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12 Cosmology with an energy cut-off

Cosmology with an energy cut-off

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J. P. P. Vieira

13 Making use of holes

Making use of holes

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J. P. P. Vieira

14 Making use of holes

Making use of holes

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15 Making use of holes

Making use of holes

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16 Making use of holes

Making use of holes

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17 Making use of holes

Making use of holes

T<0

T>0

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18 Hole dynamics

Hole dynamics

Low-temperature holes may behave like

radiation

matter

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19 Full of holes

Full of holes

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20 Full of holes

Full of holes

Romero-Roch?n, Phys. Rev. E, 88, 022144 (2013)

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21 If a component of the Universe is allowed to be at T<0: accelerated

If a component of the Universe is allowed to be at T<0: accelerated

expansion with w?-1 naturally arises (inflation? dark energy? Big Crunch averted?) BUT…

In conclusion

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22 In Conclusion

In Conclusion

Where could the cut-off come from? Quantum gravity (discrete spacetime)? What is the microscopic origin of P<0? Modified Heisenberg uncertainty? Could thermalisation at high temperatures be forbidden? How would inflation end? ”Temperon” decay? Thermalisation with bosons?

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J. P. P. Vieira

23 In Conclusion

In Conclusion

Where could the cut-off come from? Quantum gravity (discrete spacetime)? What is the microscopic origin of P<0? Modified Heisenberg uncertainty? Could thermalisation at high temperatures be forbidden? How would inflation end? ”Temperon” decay? Thermalisation with bosons?

COSMO 15

11/09/2015

J. P. P. Vieira

24 In Conclusion

In Conclusion

Where could the cut-off come from? Quantum gravity (discrete spacetime)? What is the microscopic origin of P<0? Modified Heisenberg uncertainty? Could thermalisation at high temperatures be forbidden? How would inflation end? ”Temperon” decay? Thermalisation with bosons?

COSMO 15

11/09/2015

J. P. P. Vieira

25 The End

The End

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26 Cosmology with an energy cut-off

Cosmology with an energy cut-off

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27 Thermodynamic Formulas

Thermodynamic Formulas

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28 Thermodynamic Formulas

Thermodynamic Formulas

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29 Gibbs-Hertz Entropy

Gibbs-Hertz Entropy

Loris Ferrari (2015) arXiv:1501.04566v3

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«Cosmology With Negative Absolute Temperatures»
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