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Topological order following a quantum quench
(2009)
We determine the conditions under which topological order survives a rapid quantum quench. Specifically, we consider the case where a quantum spin system is prepared in the ground state of the toric code model and, after ...
NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211
(Astronomical Society of the Pacific, 2003)
An analysis of UV spectra of BD+28circ4211 obtained with the STIS spectrograph onboard the HST is presented. The spectral analysis is based on NLTE model calculation, which deal with the lineblanketing of iron group elements ...
Masses and Other Parameters of the PostCommon Envelope Binary BE Ursae Majoris
(1999)
The binary star BE Ursae Majoris is recently emerged from the common envelope phase; indeed, the hot sdO/DAO component is the central star of the associated planetary nebula. As such, BE UMa represents an important test ...
The planetary nebulae of PG 1159 stars - clues to their evolutionary history
(Astronomical Society of the Pacific, 1996)
It is shown that many planetary nebulae (PN) surrounding PG 1159 stars display a bipolar morphology. The frequency of these nebulae is higher than observed in other PN samples. Implications for the evolutionary history of ...