# Exponential Growth of Noise in Quantum Computers

I recently listened to a presentation for Introductory Quantum Computing. It was very general and meant to give the listeners an idea about the potential for Quantum Computing.

The speaker ended the talk with a kind of "On the Other Hand" talking point by mentioning that some people are concerned that the noise in Quantum Computers will grow at such a rate that limits their overall potential.

I was wondering if anyone on this channel has any experience with this issue or knowledge about it? Is this a theoretical limit of physics of an engineering problem? What is the current state of thinking about this issue and do recent breakthroughs in Quantum Error Correction do anything to address it?

To ilustrate the idea, you can encode one qubit $$|q\rangle=\alpha|0\rangle+\beta|1\rangle$$ with more qubits, for example $$|q\rangle=\alpha|0000\rangle+\beta|1111\rangle$$ and after calculation, based on majority rule, to decide about result.