There are some things which cannot be learned quickly,
and time, which is all we have,
must be paid heavily for their acquiring.
They are the very simplest things,
and because it takes a man’s life to know them
the little new that each man gets from life
is very costly and the only heritage he has to leave.
– Ernest Hemingway (From A. E. Hotchner, Papa Hemingway, Random House, NY, 1966)
The “Rediscovery” of Spin Networks and Loop Quantum Gravity
Its hard to describe the frustration and anger I feel to see all these papers talk about “tensor networks” and geometry as if they are discovering something new which wasn’t already discovered 31 years ago under the framework known as Loop Quantum Gravity (LQG). Take this recent paper for example: http://arxiv.org/abs/2402.05910 “First, how might we… Continue reading The “Rediscovery” of Spin Networks and Loop Quantum Gravity