The realization of quantum networks and quantum repeaters remains an outstanding challenge in quantum communication. These rely on the entanglement of remote matter systems, which in turn requires the creation of quantum correlations between a single photon and a matter system. A practical way to establish such correlations is via spontaneous Raman scattering in atomic ensembles, known as the D...

The South American leafhopper genus Parandanus Linnavuori & DeLong (Deltocephalinae: Deltocephalini) is reviewed and four of its six species are illustrated and male genital characters are provided. Three new species from Peru, Parandanus longistylus Duan, sp. n., Parandanus nigricephalus Duan, sp. n. and Parandanus paracruciatus Duan, sp. n. are described. A key to species is also provided.

The current quasiexperimental study was intended to determine the efficacy of Ba Duan Jin (translation: eight-section brocade) in improving balance ability of Chinese community-dwelling older adults. The trial group (n = 47) engaged in a Ba Duan Jin exercise program for 12 weeks, whereas the control group (n = 48) participated in a 12-week walking exercise program. After the intervention, parti...

Nalmefene hydrochloride injection is not stable, and the formation of dimers may occur quickly, limiting the use of nalmefene hydrochloride in the clinic. Therefore, in this study, we aimed to optimize the preparation of nalmefene hydrochloride injection in order to increase the stability of the drug.

Objective] Ba-Duan-Jin, formed in the 12th century, is an excellent traditional Chinese health exercises. Ancients likened it to “brocade (Jin)”, meaning its action is as elegant as brocade. The total movements are divided into 8 sections, so it is called “ Ba-Duan-Jin (8-section-action)”. Because of its simple action and significantly healthy effect, Ba-Duan-Jin is widely used to enhance physi...

In Duan, Gauthier and Simonato (1999), an analytical approximate formula for European options in the GARCH framework was developed. The formula is however restricted to the nonlinear asymmetric GARCH model. This paper extends the same approach to two other important GARCH specifications GJR-GARCH and EGARCH. We provide the corresponding formulas and study their numerical performance. keywords: ...

In a recent letter, Cui, Duan and Chan propose a generalisation of the Scott-Barreto method to build a larger family of MNT curves, and they claim that their proposal is also applicable to other curve construction methods. Here we show that the Cui-Duan-Chan technique is irrecoverably flawed.

This paper proposes an efficient approach to compute the prices of American style options in the GARCH framework. Rubinstein’s (1998) Edgeworth tree idea is combined with the analytical formulas for moments of the cumulative return under GARCH developed in Duan et al. (1999, 2002) to yield a simple recombining binomial tree for option valuation in the GARCH context. Since the resulting tree is ...

In this Letter we propose a robust quantum repeater architecture building on the original Duan-Lukin-Cirac-Zoller (DLCZ) protocol [L.-M. Duan, M. D. Lukin, J. I. Cirac, and P. Zoller, Nature (London) 414, 413 (2001)10.1038/35106500]. The architecture is based on two-photon Hong-Ou-Mandel-type interference which relaxes the long-distance stability requirements by about 7 orders of magnitude, fro...

This paper proposes an efficient approach for computing the prices of American style options in the GARCH framework. Rubinstein’s (1998) Edgeworth tree idea is combined with the analytical formulas for moments of the cumulative return under GARCH developed in Duan et al. (1999, 2002) to yield a simple recombining binomial tree for option valuation in the GARCH context. Since the resulting tree ...