Publications

1. H. Paik, S. K. Dutta, R. M. Lewis, T. A. Palomaki, B. K. Cooper, R. C. Ramos, H. Xu, A. J. Dragt, J. R. Anderson, C. J. Lobb, and F. C. Wellstood, “Decoherence in dc SQUID phase qubits,” Phys. Rev. B 77, 214510 (2008).

2. T. A. Palomaki, S. K. Dutta, H. Paik, H. Xu, J. Matthews, R. M. Lewis, R. C. Ramos, K. Mitra, P. R. Johnson, F. W. Strauch, A. J. Dragt, C. J. Lobb, J. R. Anderson, and F. C. Wellstood, “Initializing the flux state of multiwell inductively isolated Josephson junction qubits,” Phys. Rev. B 73, 014520 (2006).

3. H. Xu, A. J. Berkley, R. C. Ramos, M. A. Gubrud, P. R. Johnson, F. W. Strauch, A. J. Dragt, J. R. Anderson, C. J. Lobb, and F. C. Wellstood, “Spectroscopic resonance broadening in a Josephson junction qubit due to current noise,” Phys. Rev. B 71, 064512 (2005).

4. H. Z. Xu, F. W. Strauch, S. K. Dutta, P. R. Johnson, R. C. Ramos, A. J. Berkley, H. Paik, J. R. Anderson, A. J. Dragt, C. J. Lobb, and F. C. Wellstood, “Spectroscopy of three-particle entanglement in a macroscopic superconducting circuit,” Phys. Rev. Lett. 94, 027003 (2005). Also in AIP Physics News Update (Mar. 2005): First Evidence For Entanglement of Three Macroscopic Objects.

5. S. K. Dutta, H. Xu, A. J. Berkley, R. C. Ramos, M. A. Gubrud, J. R. Anderson, C. J. Lobb, and F. C. Wellstood, “Determination of relaxation time of a Josephson junction qubit,” Phys. Rev. B 70, 140502(R) (2004).

6. A. J. Berkley, H. Xu, R. C. Ramos, M. A. Gubrud, F. W. Strauch, P. R. Johnson, J. R. Anderson, A. J. Dragt, C. J. Lobb, and F. C. Wellstood, “Entangled macroscopic quantum states in two superconducting qubits,” Science, 300, 1548-1550 (2003). Also in BBC News (May 2003): Quantum computer draws closer.

7. H. Xu, A. J. Berkley, M. A. Gubrud, R. C. Ramos, J. R. Anderson, C. J. Lobb, and F. C. Wellstood, “Analysis of energy level quantization and tunneling from the zero-voltage state of a current-biased Josephson junction,” IEEE Trans. Appl. Supercond.13, 956-959 (2003).

8. A. J. Berkley, H. Xu, M. A. Gubrud, R. C. Ramos, J. R. Anderson, C. J. Lobb, and F. C. Wellstood, “Decoherence in a Josephson-junction qubit,” Phys. Rev. B 68, 060502(R) (2003).