High-order exceptional points in ultracold Bose gases
High-order exceptional points in ultracold Bose gases
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超冷玻色气体中的高阶特异点
DOI:
10.1103/physreva.99.011601
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发表时间:
2018-11
影响因子:
2.9
通讯作者:
Cui Xiaoling
中科院分区:
文献类型:
--
作者:
Pan Lei;Chen Shu;Cui Xiaoling
We show that arbitrarily-high-order exceptional points (EPs) can be achieved in a repulsively interacting two-species Bose gas in one dimension. By exactly solving the non-Hermitian two-boson problem, we demonstrate the existence of third-order EPs when the system is driven across the parity-time symmetry-breaking transition. We further address the fourth-order EPs with three bosons and generalize the results to the $N$-body system, where the EP order can be as high as $N+1$. Physically, such high order originates from the intrinsic ferromagnetic correlation in spinor bosons, which causes the entire system to collectively behave as a single huge spin. Moreover, we show how to create an ultrasensitive spectral response around EPs via an interaction anisotropy in different spin channels. Our work puts forward the possibility of atomic sensors made from highly controllable ultracold gases.
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DOI:
10.5860/choice.35-3364
发表时间:
1971
期刊:
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影响因子:
--
作者:
J. H. Wilkinson;C. Reinsch
通讯作者:
J. H. Wilkinson;C. Reinsch
影响因子:
8.6
作者:
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通讯作者:
Boettcher, S
DOI:
10.1201/b18213-15
发表时间:
1972
期刊:
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影响因子:
--
作者:
R. A. Beaumont
通讯作者:
R. A. Beaumont
DOI:
10.1201/9781420070033.pt2
发表时间:
1968
期刊:
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影响因子:
--
作者:
L. Shen;Haohao Wang;J. Wojdylo
通讯作者:
L. Shen;Haohao Wang;J. Wojdylo
影响因子:
2.9
作者:
Yang Lijun;Cui Xiaoling
通讯作者:
Cui Xiaoling