loop quantum gravity. quantum mechanics study of the very small matter and energy quantized discrete...
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Loop Quantum Gravity
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Quantum Mechanics
• Study of the very small
• Matter and energy quantized
• Discrete packets – “quanta”
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The Problem
• Nothing about the structure of matter
• Nothing about how gravity is generated
• Global not local• Black holes, the big
bang
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Loop Quantum Gravity
• Attempts to reconciles QM, GR• Alternative to string theory• Quantum space is granular, 10-35 meters • Spacetime links connecting these chunks
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Loops
• Links form braided loops
• Loops are elementary particles
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Twists determine charge
• Each twist 1/3 electron charge
• Clockwise negative
• Counter-clockwise positive
• Electron 3 clockwise twists
• Positron complement
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The Universe
• Turbulent, fluctuates 10-44 seconds
• A giant quantum computer
• The chunks are qubits• Qubits preserve
braids
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Space does not exist
• Space is a web of information
• Humans are mere tangles
• No fundamental building blocks
• Matter emerges as network of relationships
• Loops not in space, loops are space
• Requires new quantum theory without background
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Names
• Abhay Ashtekar http://cgpg.gravity.psu.edu• Lee Smolin http://www.qgravity.org/• Carlo Rovelli http://www.cpt.univ-mrs.fr/~rovelli/• Sundance Bilson-Thompson • Fotini Markopoulou• David Kribs http://www.uoguelph.ca/~dkribs/