Hi, Quantum Physics, as interesting as it sounds, is much difficult to understand.

Let me explain in the simplest manner:
When things get small--reallysmall-- it becomes less and less possible to measure them accurately. So there's this sort of barrier beyond which we can't describe space and matter with particles anymore and have to describe them with wiggling probabilities. The idea is "we can't see what's going on that deep, but there's a 50% chance it's an electron."

However, research seems to suggest that the wibbly wobbly probability stuff isn't just "particles so small we can't see them" but something so fuzzy it's not even a particle anymore. This fuzzy stuff followssomeof the rules of "normal" particles, but not all of them, and in particular it can bubble around in ways that make it appear to teleport or be in two places at once.

The idea behind quantum computing is that, rather than switches that can only be "here" or "there", we can harness the quantum wiggles to make switches be "here if it's convenient for the math to work out" or "nowhere in particular until you shine a light near them" or even "30% here and 70% there simultaneously." Since it's really, really hard to control something that appears completely random to us, this is no small undertaking-- but it would open up whole new worlds of computer engineering.

This is simply put for Quantum Physics!^

Hii aspirants

let me clear your doubt.

Quantum theory is theoretical explanation  of modern physics that explains the nature and behavior of matter ,energy on the atomic and subatomic level. The nature and behavior of matter and energy at that level is sometimes referred to as quantum physics and quantum mechanics.

I hope my answer will be helpful for you

Good luck