Why are quantum and special relativity incompatible?

In quantum mechanics, fields are discontinuous and are defined by ‘quanta’. Quantum mechanics is incompatible with general relativity because in quantum field theory, forces act locally through the exchange of well-defined quanta.

Why does gravity work in quantum level?

Ignoring the curvature of space for particles works because gravity is so much weaker than the other forces that space looks flat when zoomed in on something as small as an electron. The effects of gravity and the curvature of space are relatively obvious at more zoomed-out levels, like planets and stars.

How does gravity interact with space-time at the quantum level?

Gravity is a common source of interaction between everything in nature, even in space that is formulated as spacetime. If we want describe the gravity interact with space-time at the quantum level, we should use quantum concept of gravity that is called graviton. Our believing about the existence or non-existence of gravitons do not matter.

What is M-theory and loop quantum gravity?

The field of quantum gravity is actively developing, and theorists are exploring a variety of approaches to the problem of quantum gravity, the most popular being M-theory and loop quantum gravity. All of these approaches aim to describe the quantum behavior of the gravitational field.

Is string theory related to quantum gravity?

String theory. Although string theory had its origins in the study of quark confinement and not of quantum gravity, it was soon discovered that the string spectrum contains the graviton, and that “condensation” of certain vibration modes of strings is equivalent to a modification of the original background.

Is there a quantum field theory for the gravitational force?

General relativity, like electromagnetism, is a classical field theory. One might expect that, as with electromagnetism, the gravitational force should also have a corresponding quantum field theory .