Wednesday, March 20, 2013

1303.4539 (Erik M. Gauger et al.)

Comment on "Quantum Coherence and Sensitivity of Avian Magnetoreception"    [PDF]

Erik M. Gauger, Simon C. Benjamin
In a recent Letter [Phys. Rev. Lett. 109, 110502 (2012), arXiv:1204.6528], Bandyopadhyay, Paterek and Kaszlikowski report their analysis of spin coherence time in the radical pair involved in avian magnetoreception, concluding that is of the order of a microsecond. However, a combination of an erroneous numerical calculation together with an incorrect parameter drawn from an experimental source have resulted in the authors underestimating by two orders of magnitude. Consequently, one must reverse the authors' conclusion that the timescale is consistent with experiments on cryptochrome.
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