Quantum technologist, NASA-trained Commercial Astronaut Christopher Altman

Simultaneous State Measurement of Coupled Josephson Phase Qubits NIST, UCSB In Science [25 Feb 2005], McDermott et al. report on simultaneous precision measurement of antiphase oscillation between flux qubits, consistent with entanglement of the two qubit states. "One of the many challenges of building a scalable quantum computer is single-shot measurement of all the quantum bits. Here, we exploit the simultaneous single-shot measurement of two coupled Josephson phase qubits to directly probe interaction of the qubits in the time domain [...] thereby opening the possibility for the full characterization of multi-qubit gates and elementary quantum algorithms."