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17 papers · 1 filter
Enhancement of the stability of genetic switches by overlapping upstream regulatory domains
Patrick B. Warren, Pieter Rein ten Wolde
We study genetic switches formed from pairs of mutually repressing operons. The switch stability is characterised by a well defined lifetime which grows sub-exponentially with the…
Statistical analysis of the spatial distribution of operons in the transcriptional regulation network of Escherichia coli
P. B. Warren, P. R. ten Wolde
We have performed a statistical analysis of the spatial distribution of operons in the transcriptional regulation network of Escherichia coli. The analysis reveals that operons tha…
Weakly bound dimers of fermionic atoms
D. S. Petrov, C. Salomon, G. V. Shlyapnikov
We discuss the behavior of weakly bound bosonic dimers formed in a cold Fermi gas at a large positive scattering length for the interspecies interaction. We find the exact solu…
Hydrodynamic behavior in expanding thermal clouds of Rb-87
I. Shvarchuck, Ch. Buggle, D. S. Petrov +4
We study hydrodynamic behavior in expanding thermal clouds of Rb-87 released from an elongated trap. At our highest densities the mean free path is smaller than the radial size of…
Degenerate atom-molecule mixture in a cold Fermi gas
S. J. J. M. F. Kokkelmans, G. V. Shlyapnikov, C. Salomon
We show that the atom-molecule mixture formed in a degenerate atomic Fermi gas with interspecies repulsion near a Feshbach resonance, constitutes a peculiar system where the atomic…
Achieving a BCS transition in an atomic Fermi gas
L. D. Carr, G. V. Shlyapnikov, Y. Castin
We consider a gas of cold fermionic atoms having two spin components with interactions characterized by their s-wave scattering length . At positive scattering length the atoms…