Sensitive chemical compass assisted by quantum criticality

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	Cai, CY; Ai, Q; Quan, HT; Sun, CP; Cai, CY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
	Sensitive chemical compass assisted by quantum criticality
发表期刊	PHYSICAL REVIEW A
语种	英语
关键词	Magnetoreception Photosynthesis Temperature Coherence Systems Birds Model
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.
	2012
ISSN	1050-2947
卷号	85 期号:2 页码:22315
学科领域	Physics
收录类别	SCI
项目资助者	National Natural Science Foundation of China [10935010, 11074261]; National Science Foundation (U.S.A.) [DMR-0906601] ; National Natural Science Foundation of China [10935010, 11074261]; National Science Foundation (U.S.A.) [DMR-0906601] ; National Natural Science Foundation of China [10935010, 11074261]; National Science Foundation (U.S.A.) [DMR-0906601] ; National Natural Science Foundation of China [10935010, 11074261]; National Science Foundation (U.S.A.) [DMR-0906601]
引用统计	被引频次：28[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/15160
专题	理论物理所科研产出_SCI论文
通讯作者	Cai, CY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Cai, CY,Ai, Q,Quan, HT,et al. Sensitive chemical compass assisted by quantum criticality[J]. PHYSICAL REVIEW A,2012,85(2):22315.
APA	Cai, CY,Ai, Q,Quan, HT,Sun, CP,&Cai, CY .(2012).Sensitive chemical compass assisted by quantum criticality.PHYSICAL REVIEW A,85(2),22315.
MLA	Cai, CY,et al."Sensitive chemical compass assisted by quantum criticality".PHYSICAL REVIEW A 85.2(2012):22315.

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