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Du, S.; Squires, M. B.; Imai, Y.; Czaia, L.; Saravanan, R. A.; Bright, V.; Reichel, J.; Hänsch, T. W.; Anderson, D. Z.: Atom-chip Bose-Einstein condensation in a portable vacuum cell. Physical Review A 70 (5), 053606 (2004)

Peik, E.; Lipphardt, B.; Schnatz, H.; Schneider, T.; Tamm, C.; Karshenboim, S. G.: Limit on the present temporal variation of the fine structure constant. Physical Review Letters 93 (17), 170801 (2004)

Angstmann, E. J.; Flambaum, V. V.; Karshenboim, S. G.: Cosmological variation of the fine-structure constant versus a new interaction. Physical Review A 70 (4), 044104 (2004)

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Karshenboim, S. G.: Precision study of positronium: Testing bound state QED theory. International Journal of Modern Physics A 19 (23), pp. 3879 - 3896 (2004)

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Gabrielse, G.; Speck, A.; Storry, C. H.; LeSage, D.; Guise, N.; Grzonka, D.; Oelert, W.; Schepers, G.; Sefzick, T.; Pittner, H. et al.; Walz, J.; Hänsch, T. W.; Comeau, D.; Hessels, E. A.: First measurement of the velocity of slow antihydrogen atoms. Physical Review Letters 93 (7), 073401 (2004)

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Oxley, P.; Bowden, N. S.; Parrott, R.; Speck, A.; Storry, C. H.; Tan, J. N.; Wessels, M.; Gabrielse, G.; Grzonka, D.; Oelert, W. et al.; Schepers, G.; Sefzick, T.; Walz, J.; Pittner, H.; Hänsch, T. W.; Hessels, E. A.: Aperture method to determine the density and geometry of antiparticle plasmas. Physics Letters B 595, pp. 60 - 67 (2004)

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Eiermann, B.; Anker, T.; Albiez, M.; Taglieber, M.; Treutlein, P.; Marzlin, K. P.; Oberthaler, M. K.: Bright Bose-Einstein gap solitons of atoms with repulsive interaction. Physical Review Letters 92 (23), 230401 (2004)

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Treutlein, P.; Hommelhoff, P.; Steinmetz, T.; Hänsch, T. W.; Reichel, J.: Coherence in microchip traps. Physical Review Letters 92 (20), 203005 (2004)

Paredes, B.; Widera, A.; Murg, V.; Mandel, O.; Fölling, S.; Cirac, J. I.; Shlyapnikov, G. V.; Hänsch, T. W.; Bloch, I.: Tonks-Girardeau gas of ultracold atoms in an optical lattice. Nature 429 (6989), pp. 277 - 281 (2004)

Schwedes, C.; Becker, T.; von Zanthier, J.; Walther, H.; Peik, E.: Laser sideband cooling with positive detuning. Physical Review A 69 (5), 053412 (2004)

Eremina, E.; Liu, X.; Rottke, H.; Sandner, W.; Schätzel, M. G.; Dreischuh, A.; Paulus, G. G.; Walther, H.; Moshammer, R.; Ullrich, J.: Influence of molecular structure on double ionization of N-2 and O-2 by high intensity ultrashort laser pulses. Physical Review Letters 92 (17), 173001 (2004)