Sensitive chemical compass assisted by quantum criticality

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	Sensitive chemical compass assisted by quantum criticality
	Sun, CP
刊名	PHYSICAL REVIEW A
	2012
卷号	85 期号:2 页码:22315
关键词	MAGNETORECEPTION PHOTOSYNTHESIS TEMPERATURE COHERENCE SYSTEMS BIRDS MODEL
ISSN号	1050-2947
通讯作者	Cai, CY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
英文摘要	A radical-pair-based chemical reaction might be used by birds for navigation via the geomagnetic direction. The inherent physical mechanism is that the quantum coherent transition from a singlet state to triplet states of the radical pair could respond to a weak magnetic field and be sensitive to the direction of such a field; this then results in different photopigments to be sensed by the avian eyes. Here, we propose a quantum bionic setup, inspired by the avian compass, as an ultrasensitive probe of a weak magnetic field based on the quantum phase transition of the environments of the two electrons in the radical pair. We prove that the yield of the chemical products via recombination from the singlet state is determined by the Loschmidt echo of the environments with interacting nuclear spins. Thus quantum criticality of environments could enhance the sensitivity of detection of weak magnetic fields.
学科主题	Physics
收录类别	SCI
资助信息	National Natural Science Foundation of China [10935010, 11074261]; National Science Foundation (U.S.A.) [DMR-0906601]
原文出处	http://dx.doi.org/10.1103/PhysRevA.85.022315
语种	英语
WOS记录号	WOS:000300235300006
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15160]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Sun, CP. Sensitive chemical compass assisted by quantum criticality[J]. PHYSICAL REVIEW A,2012,85(2):22315.
APA	Sun, CP.(2012).Sensitive chemical compass assisted by quantum criticality.PHYSICAL REVIEW A,85(2),22315.
MLA	Sun, CP."Sensitive chemical compass assisted by quantum criticality".PHYSICAL REVIEW A 85.2(2012):22315.