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4 papers · 1 filter
Symmetric matrices and quantum codes
Vladimir D. Tonchev
This paper has been withdrawn since a Gilbert-Varshamov bound for general quantum codes has already appeared in Ekert and Macchiavello, Prys. Rev. Lett. 77, p. 2585, and a Gilbert-…
Quantum self-dual codes and symmetric matrices
Vladimir D. Tonchev
This paper has been withdrawn since a Gilbert-Varshamov bound for general quantum codes has already appeared in Ekert and Macchiavello, Prys. Rev. Lett. 77, p. 2585, and a Gilbert-…
GRB Spikes Could Resolve Stars
Robert J. Nemiroff, Jay P. Norris, Jerry T. Bonnell +1
GRBs vary more rapidly than any other known cosmological phenomena. The lower limits of this variability have not yet been explored. Improvements in detectors would reveal or limit…
Bright Lenses and Optical Depth
Robert J. Nemiroff
In gravitational lensing, the concept of optical depth assumes the lens is dark. Several microlensing detections have now been made where the lens may be bright. Relations are deve…