String theorists want to know how forces+matter work in the UV.
Some remarkably durable myths about string theory persist, even among physics PhDs who should know better.
Basic idea: fundamental LEGOs are tiny vibrating strings, closed/open.
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.
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:-
Strategy tip for aspiring T-HEP students: game theory favours those who do not procrastinate over approaching potential supervisors.