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*in ‘physics’, string theory is a ‘theoretical framework’ in which the ‘point-like particles’ of ‘particle physics’ are replaced by ‘1-dimensional objects’ called ‘strings’*
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(it describes how these ‘strings’ propagate through ‘space’ + interact with each other)
(on ‘distance scales’ larger than the ‘string scale’, a ‘string’ looks just like an ‘ordinary particle’, with its [‘mass’ / ‘charge’ / other ‘properties’] determined by the ‘vibrational state’ of the ‘string’)
(in ‘string theory’, 1 of the many ‘vibrational states’ of the ‘string’ corresponds to the ‘graviton’, a ‘quantum mechanical particle’ that carries ‘gravitational force’)
(thus ‘string theory’ is a theory of ‘quantum gravity’)
(‘string theory’ is a ‘broad’ + ‘varied’ subject that attempts to address a number of ‘deep questions’ of ‘fundamental physics’)
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*’string theory’ has been applied to a variety of problems in…*
‘black hole physics’
‘early universe cosmology’
‘nuclear physics’
‘condensed matter physics’
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(‘string theory’ has also stimulated a # of ‘major developments’ in ‘pure mathematics’)
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(because ‘string theory’ potentially provides a ‘unified description’ of ‘gravity’ + ‘particle physics’, it is a candidate for a ‘theory of everything’)
(a ‘self-contained mathematical model’ that describes all ‘fundamental forces’ + ‘forms of matter’)
(despite much work on these problems, it is not known to what extent ‘string theory’ describes the ‘real world’ or how much ‘freedom’ the ‘theory’ allows to choose the details)
(‘string theory’ was first studied in the ‘late 1960s’ as a theory of the ‘strong nuclear force’, before being abandoned in favor of ‘quantum chromodynamics’)
(subsequently, it was realized that the very properties that made ‘string theory’ unsuitable as a theory of ‘nuclear physics’ made it a promising candidate for a ‘quantum theory of gravity’)
(the earliest version of ‘string theory’ (called ‘bosonic string theory’) incorporated only the class of particles known as ‘bosons’)
(it later developed into ‘superstring theory’, which posits a ‘connection’ called ‘super-symmetry’ between ‘bosons’ + the class of particles called ‘fermions’)
(5 consistent versions of ‘superstring theory’ were developed before it was conjectured in the ‘mid-1990s’ that they were all different limiting cases of a ‘single theory’ in ’11 dimensions’ known as ‘m-theory’)
(in ‘late 1997’, ‘theorists’ discovered an important relationship called the ‘AdS/CFT correspondence’, which relates ‘string theory’ to another type of ‘physical theory’ called a ‘quantum field theory’)
(one of the challenges of ‘string theory’ is that the full theory does not have a satisfactory definition in all circumstances)
(another issue is that the theory is thought to describe an enormous landscape of ‘possible universes’, and this has complicated efforts to develop theories of ‘particle physics’ based on ‘string theory’)
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(these issues have led some in the community to criticize these approaches to ‘physics’ and question the value of continued research on ‘string theory unification’)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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👈👈👈☜*“THEORIES OF EVERYTHING”* ☞ 👉👉👉
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥