Learn quantum

01 What is a qubit? A regular bit is a switch. A qubit is a direction. Start here. 1 min read Start here 02 Superposition explained Not "both at once" - that phrase has done more harm than good. 1 min read 03 What is entanglement? Two qubits with no individual state of their own - only a shared one. 1 min read 04 Quantum vs. classical Not faster. Different - and worse at almost everything. 1 min read 05 Why quantum computers need to be so cold Colder than deep space, because heat is noise and noise is data loss. 1 min read 06 Physical vs. logical qubits The single most important number to check in any announcement. 1 min read 07 What is quantum error correction? Fixing errors in something you are not allowed to look at. 1 min read 08 Will quantum computers break encryption? Eventually, some of it. Not today, and the timeline is genuinely disputed. 1 min read