string theory

US /strɪŋ ˈθiː.ri/
UK /strɪŋ ˈθiː.ri/
"string theory" picture
1.

a theoretical framework in physics in which the point-like particles of particle physics are replaced by one-dimensional objects called strings

:
Many physicists are exploring string theory as a potential 'theory of everything'.
Understanding string theory requires advanced knowledge of mathematics and physics.