My expertise has constantly been that it does from conventional science courses, but really thinking around it, i was wondering if this is really the case.

To my minimal understanding over there is a theory that there room gravitons the act together particles to traction two different masses together. If this gravitons really space the physics particles the gravity, climate a so called "vacuum" that had actually gravity wouldn"t be a vacuum at all. A real vacuum should lack these particles, and thus, lack gravity?

Anything in the vacuum have to then implode because of its very own gravitational attraction in ~ itself? If this is the case, could we speak in a actual vacuum, outside gravity does not exist?

You are watching: In a vacuum, the gravitational force is "turned off."

quantum-gravity vacuum
point out
enhance this concern
edited Apr 19 "15 at 14:01

155k2828 yellow badges377377 silver- badges18391839 bronze title
request Apr 19 "15 in ~ 5:25

78111 gold badge66 silver- badges55 bronze badges
include a comment |

7 answers 7

active oldest Votes

See more: 25 Is What Is 25 Percent Of 60 ? What Is 25 Percent Of 60

Your intuition is good, yet you"re mixing up part quantum and also classical phenomena.

In timeless (i.e. Non-quantum), a vacuum is a region of room with no matter. You deserve to have electromagnetic fields in a vacuum, so long as the charges creating the fields are in a various region. Through the very same token you have the right to have gravitational fields in a vacuum, produced by masses in other places in space. In this classical description of the universe, there are no such points as photons or gravitons, and also everything (for the many part) works out.

In quantum, the story is not so easy. Together you say, currently our force areas are particles, too (photons and also gravitons), so possibly a "quantum vacuum" shouldn"t include them either? Unfortunately, it transforms out the in quantum mechanics (as plunder pointed out) the is impossible to have actually a perfect vacuum, a state v no corpuscle in it in ~ all. One way to see this is through the energy-time apprehension principle: $\Delta E \ \Delta t > \hbar/2$.

A perfect vacuum, a state v no corpuscle at all, have to have specifically zero energy. If the energy is specifically zero, climate it is totally certain, and also $\Delta E = 0$ i m sorry violates the skepticism principle. Therefore the quantum vacuum is not a state with zero particles, that is a state through probably zero particles. And in different situations you may find valuable to transform your meaning of "probably," therefore there space a lot of of various things physicists will speak to a "vacuum" in quantum mechanics.

This idea, the quantum mechanically over there are always some particles roughly in any an ar of space, has actually some cool aftermath that we"ve confirmed in the lab! One is the Casimir Effect. This is a force that mirrors up when you relocate two objects in a vacuum for this reason close with each other the press from this "virtual" photons reasons them to attract. Another is the bit they discovered at the LHC, the Higgs Boson. The Higgs field has a "vacuum expectation value," a perfect quantum vacuum will have a non-zero Higgs field throughout it. Excitations that this ar are the Higgs particles found at the LHC!