Nanofridge keeps quantum computers cool

摘要

EVEN quantum computers need to keep their cool. Now, researchers have built a nanoscale refrigerator to keep qubits cold enough to function. Instead of working with bits of information that can be either 0 or 1, as in a classical computer, a quantum computer relies on "qubits", which can be in both states simultaneously. The qubits must be shielded from external noise, since the slightest interference will destroy the delicate state. But well-isolated qubits heat up quickly.