Maintaining Entanglement for an Hour

Maintaining quantum states for any length of time is one of the big challenges in quantum computing. So this news about maintaining entanglement for an hour is encouraging. (Image from the article.)

Billions of entangled particles

This has been making quite a bit of news lately, the entanglement of 10^10 spin pairs. (Image from the paper on Nature.) Here are a few different articles:

• New York Times
• Reuters
• Nature

Entanglement of 3 out of 4 qubits in a superconducting system

Out of Nature: Entanglement of 3 out of 4 qubits in a superconducting system. Of course, others have done more than that, but superconducting systems seem to be more scalable- which means they have the possibility of being the first practical system.