To what extent can information propagation decouple from energy propagation? (R. Jonsson)

  • Datum: 20.05.2016
  • Uhrzeit: 14:00 - 15:30
  • Vortragende(r): Robert Harry Jonsson, Perimeter Institute, Waterloo, Canada
  • Raum: Herbert Walther Lecture Hall
  • Gastgeber: MPQ, Theory Division
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. The new phenomenon arises from the quantization of classical wave phenomena, associated with the strong Huygens principle. These result in signals which propagate partially slower than the speed of light even in massless fields. Potential applications range from cosmology to quantum information.

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