Astrophysical constraints on Planck scale dissipative phenomena

Area of Science:

• Theoretical Physics
• Quantum Gravity
• Cosmology

Background:

• The emergence of classical spacetime from quantum gravity remains a significant challenge.
• Matter excitations in a quantum spacetime condensate may exhibit modified high-energy kinematics.
• Dissipative effects are expected in such a scenario due to energy exchange with spacetime constituents.

Purpose of the Study:

• To investigate the phenomenological consequences of dissipative effects in a quantum gravity context.
• To derive particle energy loss rates from fundamental principles.
• To establish constraints on quantum gravity models using astrophysical data.

Main Methods:

• Utilizing dissipative hydrodynamics as a framework for energy exchange.
• Deriving particle energy loss rates from dispersion relations.
• Comparing theoretical predictions with astrophysical observations of high-energy particles.

Main Results:

• Dissipative effects provide a mechanism for energy loss of elementary particles.
• Dispersion relations can quantify these energy loss rates.
• Astrophysical observations offer stringent constraints on quantum gravity models.

Conclusions:

• Dissipative hydrodynamics offers a viable framework for studying quantum gravity phenomenology.
• The energy loss of high-energy particles is a key observable for testing quantum gravity.
• Astrophysical data can significantly narrow down possibilities for fundamental spacetime theories.