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Books > Science & Mathematics > Physics > Quantum physics (quantum mechanics)
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Quantum Space - Loop Quantum Gravity and the Search for the Structure of Space, Time, and the Universe (Hardcover)
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Quantum Space - Loop Quantum Gravity and the Search for the Structure of Space, Time, and the Universe (Hardcover)
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Today we are blessed with two extraordinarily successful theories
of physics. The first is Albert Einstein's general theory of
relativity, which describes the large-scale behaviour of matter in
a curved spacetime. This theory is the basis for the standard model
of big bang cosmology. The discovery of gravitational waves at the
LIGO observatory in the US (and then Virgo, in Italy) is only the
most recent of this theory's many triumphs. The second is quantum
mechanics. This theory describes the properties and behaviour of
matter and radiation at their smallest scales. It is the basis for
the standard model of particle physics, which builds up all the
visible constituents of the universe out of collections of quarks,
electrons and force-carrying particles such as photons. The
discovery of the Higgs boson at CERN in Geneva is only the most
recent of this theory's many triumphs. But, while they are both
highly successful, these two structures leave a lot of important
questions unanswered. They are also based on two different
interpretations of space and time, and are therefore fundamentally
incompatible. We have two descriptions but, as far as we know,
we've only ever had one universe. What we need is a quantum theory
of gravity. Approaches to formulating such a theory have primarily
followed two paths. One leads to String Theory, which has for long
been fashionable, and about which much has been written. But String
Theory has become mired in problems. In this book, Jim Baggott
describes "the road less travelled": an approach which takes
relativity as its starting point, and leads to a structure called
Loop Quantum Gravity. Baggott tells the story through the careers
and pioneering work of two of the theory's most prominent
contributors, Lee Smolin and Carlo Rovelli. Combining clear
discussions of both quantum theory and general relativity, this
book offers one of the first efforts to explain the new quantum
theory of space and time.
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