What is the LQG theory?

Loop quantum gravity (LQG) is a theory of quantum gravity, which aims to merge quantum mechanics and general relativity, incorporating matter of the Standard Model into the framework established for the pure quantum gravity case. Consequently, not just matter, but space itself, prefers an atomic structure.

Is space quantized in quantum mechanics?

While quantum mechanics arose from experimental observations which could not be reconciled with classical physics, till now, there is no experimental fact indicating that space and time are quantized. In general relativity, the gravitational field and the spacetime are the same physical entity.

Is quantum mechanics discrete or continuous?

Quantum mechanics is ultimately continuous, not discrete.

Is time continuous in quantum mechanics?

While time is a continuous quantity in both standard quantum mechanics and general relativity, many physicists have suggested that a discrete model of time might work, especially when considering the combination of quantum mechanics with general relativity to produce a theory of quantum gravity.

Is space time continuous or discrete?

In the usual definition of general relativity, spacetime is continuous. However, general relativity is a classical theory and does not take quantum effects into account. Such effects are expected to show up at very short distances, where your question is relevant.

What happens when space is discrete?

But according to some models, the discreteness should affect how particles move through space. It is a miniscule effect, but it adds up for particles that travel over very long distances. If space-time is discrete, there should be imperfections.

Is space and time discrete?

Space and time are discrete. There is a shortest length scale, and it has a certain value. This possibility is exciting since it helps with renormalizing quantum field theories, but it poses big problems for relativity.

Is spacetime discrete or continuous?

Is speed discrete or continuous?

Yes, speed is a common continuous variable, and the value is chosen by a random process. We know it is continuous because there is always another possible value between any two speed values.