CNBC's Jim Cramer named one quantum stock to "own," while another company achieved a major technical breakthrough and substantial share price gains. Here's a look at what happened this week in the quantum computing sector. Rigetti – RGTI Rigetti Computing, Inc. RGTI achieved a performance breakthrough and reported on Wednesday that it had reached a 99.5% median fidelity rate for two-qubit gates on its 36-qubit modular system. Rigetti stock shot up on the news and shares were 40% higher on the week. Read Nex ...