A long, long time ago, I mentioned that there were a couple of papers of mine in the process of being published. Well, they're out now. They've actually been out for a while, I've just been negligent. Now that I have them, here are the full references:
dc measurements of macroscopic quantum levels in a superconducting qubit structure with a time-ordered meter
D. S. Crankshaw, K. Segall, D. Nakada, T. P. Orlando, L. S. Levitov, S. Lloyd, S. O. Valenzuela, N. Markovic, M. Tinkham, and K. K. Berggren
Phys. Rev. B 69, 144518 (2004)
Energy Relaxation Time between Macroscopic Quantum Levels in a Superconducting Persistent-Current Qubit
Yang Yu, D. Nakada, Janice C. Lee, Bhuwan Singh, D. S. Crankshaw, T. P. Orlando, Karl K. Berggren, and William D. Oliver
Phys. Rev. Lett. 92, 117904 (2004)
They're available online, if you have a subscription. Or you could look them up in a local university library. Or you could just e-mail me and I could send you a copy if you really wanted it.