513 citations · 4.4k across the 106 of their papers we have counts for
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Phase fluctuations in atomic Bose gases
J. O. Andersen, U. Al Khawaja, H. T. C Stoof
We improve on the Popov theory for partially Bose-Einstein condensed atomic gases by treating the phase fluctuations exactly. As a result, the theory becomes valid in arbitrary dim…
Effective Field Theories for the Casimir Effect at Finite Temperature
Jens O. Andersen
We discuss corrections to the Casimir effect at finite temperature and effective field theory. Recently, it has been shown that effective field theories can reproduce radiative cor…
Mass Expansions of Screened Perturbation Theory
Jens. O Andersen, Michael Strickland
The thermodynamics of massless phi^4-theory is studied within screened perturbation theory (SPT). In this method the perturbative expansion is reorganized by adding and subtracting…
Thermal Effects in Low-Temperature QED
Jens O. Andersen
QED is studied at low temperature (, where is the electron mass) and zero chemical potential. By integrating out the electron field and the nonzero bosonic Matsubara mo…