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Thermodynamics of Exotic Matter and EnergyPowerPoint Presentation

Thermodynamics of Exotic Matter and Energy

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Presentation Transcript

1. Definition

- Energy Conditions
- Strong energy conditions
- Weak energy conditions
- Null energy conditions

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- Weaker versions
- AWEC
- ANEC

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2. Examples

- Wormhole
- Negative energy: quantum inequality
- Casimir effect
- Hawking flux into hole

- Dark energy
- Quintessence
- K-essence
- Phantom energy:

- Ghost field

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4. Thermodynamics

- Negative Energy
- Violation of second law

- Wormhole
- Negative temperature?

- Phantom Energy
- Negative entropy or
negative temperature?

- Negative entropy or

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4.2 Dark energy and Thermodynamics - Lima & Alcaniz, PLB(04)

- Acceleration(Adiabatic expansion)
(particle current) (entropy current)

- Perfect fluid
: particle number density

: specific entropy (per particle)

- Gibbs law
- Negative pressure
- Expansion -> hotter

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4.3 Dark energy and Thermodynamics 2 - Gonzalez-Diaz & Siguenza, PLB(04)

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Physical meaning of negative temperature

- The entropy of a phantom universe monotonically decreased if one would be able to add energy to that universe.
- Negative temperature is not unphysical or meaningless
- Systems with negative temperature have already been observed in the laboratory and interpreted theoretically

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Summary & Further Problems

- Summary
- Exotic matter & energy
- Thermodynamics
- Negative entropy? or Negative temperature?

- Further problems
- What is the real exotic matter or energy?
- What is the full thermodynamics of it?
- Could not exist?

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