Matter wave amplification
S. Inouye, T. Pfau, S. Gupta, A.P. Chikkatur, A. Görlitz, D.E. Pritchard, and W. Ketterle:
Observation of phase-coherent amplification of atomic matter waves.
Nature 402, 641-644 (1999).
Summary (pdf) Preprint (pdf, 131 kB) ImagesPress report (pdf,123 kB)

Critical velocity
C. Raman, M. Köhl, R. Onofrio, D.S. Durfee, C.E. Kuklewicz, Z. Hadzibabic, and W. Ketterle:
Evidence for a critical velocity in a Bose-Einstein condensed gas.
Phys. Rev. Lett. 83, 2502-2505 (1999).
Summary (pdf) Paper (pdf, 247 kB)

Phonon excitation
.D.M. Stamper-Kurn, A.P. Chikkatur, A. Görlitz, S. Inouye, S. Gupta, D.E. Pritchard, and W. Ketterle:
Excitation of phonons in a Bose-Einstein condensate by light scattering.
Phys. Rev. Lett. 83, 2876-2879 (1999).
Summary (pdf) Paper (pdf, 250 kB)

Superradiant Rayleigh scattering
S. Inouye, A.P. Chikkatur, D.M. Stamper-Kurn, J. Stenger, D.E. Pritchard, and W. Ketterle:
Superradiant Rayleigh scattering from a Bose-Einstein condensate.
Science 285, 571-574 (1999).
Summary (pdf) Paper (pdf, 175 kB) Images

Spinor tunneling
D.M. Stamper-Kurn, H.-J. Miesner, A.P. Chikkatur, S. Inouye, J. Stenger, and W. Ketterle:
Quantum tunneling across spin domains in a Bose-Einstein condensate.
Phys. Rev. Lett. 83, 661-665 (1999).
Summary (pdf) Paper (pdf, 69 kB)

Bragg spectroscopy
J. Stenger, S. Inouye, A.P. Chikkatur, D.M. Stamper-Kurn, D.E. Pritchard, and W. Ketterle:
Bragg spectroscopy of a Bose-Einstein condensate.
Phys. Rev. Lett. 82, 4569-4573 (1999).
Summary (pdf) Paper (pdf, 124 kB) Erratum (pdf, 21 kB) Animation (23 kB)

Metastable spinor BEC
H.-J. Miesner, D.M. Stamper-Kurn, J. Stenger, S. Inouye, A.P. Chikkatur, and W. Ketterle:
Observation of metastable states in spinor Bose-Einstein condensates.
Phys. Rev. Lett. 82, 2228-2231 (1999).
Summary (pdf) Paper (pdf, 189 kB)

Feshbach losses
J. Stenger, S. Inouye, M.R. Andrews, H.-J. Miesner, D.M. Stamper-Kurn, and W. Ketterle:
Strongly enhanced inelastic collisions in a Bose-Einstein condensate near Feshbach resonances.
Phys. Rev. Lett. 82, 2422-2425 (1999).
Summary (pdf) Paper (pdf, 134 kB)

Further publications
Bragg and Rayleigh scattering review
J. Stenger, S. Inouye, D.M. Stamper-Kurn, A.P. Chikkatur, D.E. Pritchard, and W. Ketterle:
Bragg spectroscopy and superradiant Rayleigh scattering in a Bose-Einstein condensate.
Appl. Phys. B 69, 347-352 (1999)
Paper (pdf, 188 kB)

Varenna lecture notes
W. Ketterle, D.S. Durfee, and D.M. Stamper-Kurn:
Making, probing and understanding Bose-Einstein condensates.
In Bose-Einstein condensation in atomic gases, Proceedings of the International School of Physics "Enrico Fermi", Course CXL, edited by M. Inguscio, S. Stringari and C.E. Wieman (IOS Press, Amsterdam, 1999) pp. 67-176.
Preprint (pdf, 1.07 MB) Fig. 10 Fig. 28