Quantum coherence and entanglement in the avian compass.

摘要: The radical-pair mechanism is one of two distinct mechanisms used to explain the navigation birds in geomagnetic fields, however little research has been done explore role quantum entanglement this mechanism. In paper we study lifetime corresponding magnitude and direction magnetic fields show that lasts long enough be for navigation. We also find appear not able orient themselves directly based on due a lack orientation sensitivity field. To further, propose model which hyperfine interactions are replaced by local similar strength. radical pair longer displays an angular weak both present previous models.