Quantum Lunch: To what extent can information propagation decouple from energy propagation? – University of Copenhagen

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Quantum Lunch: To what extent can information propagation decouple from energy propagation?

Speaker:
Robert Jonsson, Chalmers Universitet Göteborg

Title:
To what extent can information propagation decouple from energy propagation?

Abstract: 

The way in which quantities such as energy, classical and quantum information, and entanglement propagate through extended systems is of great interest from quantum field theory to condensed matter systems.
Here, I will explore the extent to which the propagation of information requires a flow of energy.
I will show that even in the basic case of a massless Klein-Gordon field in the vacuum, the propagation of information can decouple from the propagation of energy to a large extent and, in special circumstances, it can even decouple completely.
This phenomenon arises from the violation of Huygens' principle, resulting in signals which propagate partially slower than the speed of light even in massless fields.
Potential applications range from cosmology to quantum information.