Cosmic ray which comes from space and streams down to Earth can interfere with the integrity of the information in these quantum computers – MIT Research
In traditional computers, information is represented in the form of bits which are either a zero or a one. But the bits in quantum computers (called qubits) are able to exist in a superposition of both states at once. This helps quantum computer to perform many operations in parallel.
This experiment was conducted inside a dilution refrigerator, minimizing other interference by cooling the environment. A second irradiated copper disk was studied outside the fridge to measure how much radiation the quantum system was being exposed to. With this setup and other simulations, the team came to conclusion that the qubit coherence time would be limited to somewhere around four milliseconds
The experiment shows that to get the optimal performance of quantum computers, we’ll have to build them with adequate shielding.