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Peet group @ UofT Physics

What OS does the Universe run?

String theorists want to know how forces+matter work in the UV.

[String Theory is related to Particle Theory, Geometry (Math), Early Universe Cosmology Theory (CITA), Condensed Matter Theory, and Theoretical Quantum Optics.]

Some remarkably durable myths about string theory persist, even among physics PhDs who should know better.

  1. String theorists are no smarter than any other kind of physicist.
  2. String theory is physics, and it is falsifiable! see for example PRL98:041601(2007).

String Theory as Quantum Gravity

Basic idea: fundamental LEGOs are tiny vibrating strings, closed/open.

[a snapshot of a closed string (like a rubber band) and an open string (with endpoints) ]

Familiar particles are string excitations differing in mass and spin. e.g. graviton, photon.

Quantizing strings as the basic ingredients and taking the low-energy limit gives Einstein gravity (+ other stuff).

Particles are pointy. Strings are extended and hence softer in the UV. The technical details of this mend the UV sickness of GR.

My research field is string theory as a theory of quantum gravity. I research the black hole information paradox and holographic linkages between quantum entanglement and spacetime geometry.

Want to know more?

Latest public lecture: http://ap.io/archives/outreach/pi15/

Colloquium-level article: http://ap.io/home/bhmicro/

Advice page: http://ap.io/home/prospective-grad/

Suggested courses: QFT1 + QFT2, GR1, Advanced Stat Mech, Interpretations of QM, Effective Communication.

Talk to my current HQP:-

  1. Dr. Ian Jardine (MP1106)
  2. Jesse Cresswell (MP1104A)
  3. Thomas de Beer (MP1122)

Strategy tip for aspiring T-HEP students: game theory favours those who do not procrastinate over approaching potential supervisors.