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This book discusses the notion that quantum gravity may represent
the "breakdown" of spacetime at extremely high energy scales. If
spacetime does not exist at the fundamental level, then it has to
be considered "emergent", in other words an effective structure,
valid at low energy scales. The author develops a conception of
emergence appropriate to effective theories in physics, and shows
how it applies (or could apply) in various approaches to quantum
gravity, including condensed matter approaches, discrete
approaches, and loop quantum gravity.
This book discusses the notion that quantum gravity may represent
the "breakdown" of spacetime at extremely high energy scales. If
spacetime does not exist at the fundamental level, then it has to
be considered "emergent", in other words an effective structure,
valid at low energy scales. The author develops a conception of
emergence appropriate to effective theories in physics, and shows
how it applies (or could apply) in various approaches to quantum
gravity, including condensed matter approaches, discrete
approaches, and loop quantum gravity.
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