Explaining Quantum Computing to a Non-Technical Person - What Works

[DarkSideRichard47]

Whether it is a family member, a colleague who heard about Microsoft Majorana 2, or someone trying to understand why quantum threatens Bitcoin, most of us have had to explain quantum computing to someone without background in it.

Some analogies work better than others. The classic superposition-as-spinning-coin is overused and not quite right. What has actually worked for you?

[RandyOrton26]

I stopped trying to explain superposition and start with the problem. What is a thing classical computers are bad at? Finding the best route through a huge number of options. Then explain quantum computers explore many options simultaneously

[Sophie86]

The coin analogy is bad because it implies randomness rather than computation. I prefer the parallel paths analogy: classical computers try one path through a maze at a time, quantum computers try many simultaneously

[Blue Sasha]

For the qubit stability problem I use the ice cube in a warm room analogy. The quantum state is the ice cube. Majorana 2 is claiming their ice cube lasts minutes instead of seconds

[Di82]

Showing a real quantum annealing demo rather than explaining it. Watching an optimisation problem being solved is more convincing than any analogy

[StuckOnDestiny]

Entanglement I have basically stopped trying to explain in a single conversation. Superposition and interference are enough for most practical explanations of why quantum is useful

[TheGame_Fan]

For the Bitcoin quantum threat I use the locksmith analogy: current encryption is a very complex lock. Classical computers try keys one at a time. A quantum computer tries all keys at once

[Cached Warden]

The best explanation is to admit that nobody fully intuitively understands quantum mechanics and that the maths works even if the intuition does not. This is actually reassuring to people