Publications and Reports

Publications

  1. Spectroscopy of three-particle entanglement in a macroscopic superconducting circuit, Huizhong Xu, Frederick W. Strauch, S. K. Dutta, Philip R. Johnson, R. C. Ramos, A. J. Berkley, H. Paik, J. R. Anderson, A. J. Dragt, C. J. Lobb, and F. C. Wellstood,  Physical Review Letters 94, 027003 (2005).
  2. Macroscopic tunnel splittings in superconducting phase qubits, Philip R. Johnson, William T. Parsons, Frederick W Strauch, J.R. Anderson, Alex J. Dragt, C.J. Lobb, F.C. Wellstood, to appear Physical Review Letters (2005).
  3. Spectroscopic resonance broadening in a Josephson junction qubit due to current noise, 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, Physical Review B (2005).
  4. Entangled macroscopic quantum states in two superconducting qubits, 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, Science 300, 1548 (Issue of June 6, 2003) (available on www.sciencemag.com).
  5. Quantum logic gates for capacitively coupled Josephson junctions, Frederick W. Strauch, Philip R. Johnson, Alex J. Dragt, C.J. Lobb, J.R. Anderson, F. C. Wellstood, Physical Review Letters 91, 167005 (2003); preprint version: quant-ph/0303002.
  6. Defining entanglement, 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, Letter to Science 301, 1183 (Issue of August 29, 2003) (available on www.sciencemag.com).
  7. Decoherence in a Josephson junction qubit, A. J. Berkley, H. Xu, M. Gubrud, R. Ramos, J. R. Anderson, C. J. Lobb, F. C. Wellstood, Physical Review B 68, 060502 (Rapid Communications) (2003).
  8. Spectroscopy of capacitively coupled Josephson-junction qubits, Philip R. Johnson, Frederick W. Strauch, Alex J. Dragt, Roberto C. Ramos, C.J. Lobb, J.R. Anderson, F. C. Wellstood, Physical Review B 67, 020509 (Rapid Communications) (2003); preprint version: cond-mat/0210278.
  9. Capacitively Coupled Josephson Junctions: A Two-Qubit System, R.C. Ramos, F.W. Strauch, P.R. Johnson, A.J. Berkley, H. Xu, M.A. Gubrud, J.R. Anderson, C.J. Lobb, A.J. Dragt, and F.C. Wellstood, IEEE Trans. Appl. Supercond. (June 2003).
  10. Characterization of an LC-Isolated Josephson Junction Qubit, A.J. Berkley, H. Xu, M. A. Gubrud, R.C. Ramos, Jr., J.R. Anderson, C.J. Lobb, and F.C. Wellstood, Proceedings of the 2002 Applied Superconductivity Conference (June 2003).
  11. Josephson-junction qubits: entanglement and coherence, J.R. Anderson, A.J. Berkeley, A.J. Dragt, M.A. Gubrud, P.R. Johnson, C.J. Lobb, R.C. Ramos, F.W. Strauch, F.C. Wellstood, and H.Z. Xu, Superlattices and Microstructures, Elsevier Science (2003).
  12. Analysis of energy level quantization and tunneling from the zero-voltage state of a current-biased Josephson junction, H. Xu, A.J. Berkley, M.A. Gubrud, R.C. Ramos, J.R. Anderson, C.J. Lobb, and F.C.Wellstood, IEEE Trans. Appl. Supercon. (June 2003).
  13. Single and double bit quantum gates by manipulating four-fold degeneracy, T. Hakioglu, J.R. Anderson, and F.C. Wellstood, Physical Review B 66, 115324(2002).
  14. Beyond Moore's Law: Quantum Computing with RF Squids J.R. Anderson, A.J. Dragt, C. Lobb, F.C. Wellstood, M. Gubrud, M. Ejrnaes, M.M. Gorska, and T. Rusin, Cluster and Nanostructure Interfaces, edited by P. Jena, S.N. Khanna, and B.K. Rao, World Scientific Pub., p.241 (2000).
  15. Sub-Gap leakage in Nb/AlOx/Nb and Al/AlOx/Al Josephson junctions, M.A. Gubrud, M. Ejrnaes, A.J. Berkley, R.C. Ramos, I. Jin, J.R. Anderson, C.J. Lobb, and F.C. Wellstood, IEEE Trans. Appl. Supercon. 11 1002-1005 (2001).
  16. Design for effective thermalization of Junctions for quantum coherence, R.C. Ramos, M.A. Gubrud, A.J. Berkley, J.R. Anderson, C.J. Lobb, and F.C. Wellstood, IEEE Trans. Appl. Supercon. 11 998-1001 (2001).

Reports

  1. Theory of superconducting phase qubits, Frederick Strauch, Ph.D. thesis, University of Maryland (2004).
  2. Quantum computing with Josephson-junction circuits, Huizhong Xu, Ph. D. thesis, University of Maryland (2004).
  3. A Josephson junction qubit, A. J. Berkley, Ph.D. thesis, University of Maryland (2003).
  4. Quantum theory of the RF SQUID qubit, W.J. Farrell III, April 2000.
  5. Decoherence in superconducting devices, P.R. Johnson and A.J. Dragt, January 2001.

Related Maryland Publications

  1. Entanglement and decoherence of a micromechanical resonator via coupling to a cooper-pair box, A.D. Armour, M.P. Blencowe, K.C. Schwab, PRL 88, 148301 (2002).
  2. Quantum measurement of a coupled nanomechanical resonator--cooper-pair box system, E.K. Irish and K. Schwab, accepted PRB (in press).