Publications

Quantum Entanglement

  1. Measurements of Decoherence in Three dc SQUID Phase Qubits, Paik, H.; Cooper, B.K.; Dutta, S.K.; Lewis, R.M.; Ramos, R.C.; Palomaki, T.A.; Przybysz, A.J.; Dragt, A.J.; Anderson, J.R.; Lobb, C.J.; Wellstood, F.C. -- IEEE Transactions on Applied Superconductivity, v 17, n 2 (June, 2007): 120-123.
  2. Initializing the flux state of multi-well inductively isolated Josephson junction qubits, 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 -- Phys. Rev. B vol. 73, 014520 (2006).
  3. Cooper-Pair Box as a Variable Capacitor, H. Paik, F. W. Strauch, R. C. Ramos, A.J. Berkley, H. Xu, S.K. Dutta, P.R. Johnson, A.J. Dragt, J.R. Anderson, C.J. Lobb, and F.C. Wellstood -- IEEE Trans. Appl. Supercond. vol.15(2), p.884 (2005).
  4. Spectroscopy of Three-Particle Entanglement in a Macroscopic Superconducting Circuit, H. 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 -- Phys. Rev. Lett. 94, p. 027003 (2005).
  5. Spectroscopic broadening in a Josephson junction 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 -- Phys. Rev. B vol. 71 , p. 064512 (2005).
  6. Determination of Relaxation Time of a Josephson Junction Qubit, S. K. Dutta, H. Xu, A.J. Berkley, R.C. Ramos, J.R. Anderson, C.J. Lobb and F.C. Wellstood -- Phys. Rev. B (Rapid Communications) vol.70, p. 140502 (2004).
  7. Capacitively-coupled Josephson Junctions: a Two-Qubit System, R. C. Ramos, A.J. Berkley, M.A. Gubrud, H. Xu, J.R. Anderson, C.J. Lobb and F.C. Wellstood -- IEEE Trans on Appl. Supercond. vol. 13, p. 994(2003).
  8. 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 vol. 300, p. 1548 (2003).
  9. Spectroscopy of Capacitively Coupled Josephson-junction Qubits, P.R. Johnson, F.W. Strauch, A.J. Dragt, R.C. Ramos, C.J. Lobb, J.R. Anderson and F.C. Wellstood -- Phys. Rev. B vol. 67, 020509 (Rapid Communications) (2003).
  10. 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 -- EEE Trans. On Appl. Supercond., vol. 11, pp. 998-1001 (2001).
  11. Measurement of Sub-gap Leakage in Nb/AlOx/Nb and Al/AlOx/Al Josephson Junctions, M.A. Gubrud, R.C. Ramos, J.R. Anderson, C.J. Lobb and F.C. Wellstood -- IEEE Trans on Appl Supercond, vol. 11, pp. 1002-1005 (2001).

Quantum Fluids

  1. The High-temperature Phase Diagram of Single-layer 3He-4He Mixtures, R.C. Ramos and O.E. Vilches -- J. Low Temp Phys. Vol 134 (1-2), 55 (2003).
  2. Liquid-Vapor Coexistence in Two-dimensional 3He-4He Mixtures, R.C. Ramos and O.E. Vilches -- J. Low Temp Phys Vol. 113, No. 5/6, pp. 981-986 (1998).
  3. Isotopic Ordering in Single-Layer Hydrogen-Deuterium Mixtures, M. Bienfait, P. Zeppenfeld, R.C. Ramos, Jr., J.M. Gay, O.E. Vilches and G. Coddens -- Phys. Rev. B 60 (16), p.11773 (1999).
  4. Calorimetric Study of the Desorption and Phases of 3He and 4He adsorbed on two layers of H2-plated graphite above 0.2K, R.C. Ramos, Jr., P. Ebey and O.E. Vilches -- J. Low Temp Phys. Vol 110, No.1/2 , p. 615-20 (1998).
  5. Heat Capacity of Monolayer 3He adsorbed on H2 plated graphite above 0.2K, O.E. Vilches, R. C.Ramos, Jr., D. Ritter and P. Ebey, -- Czech J. of Phys Vol 46 (1998).