Lan-Lan Li

Complete discrimination of pure quantum states

Dawei Guo, Lan-Lan Li, Shouya Wang, Wen‐Hai Zhang

This paper presents a complete discrimination strategy of pure quantum states, by which the accessible information about the input pure states can be obtained completely. The complete discrimination is showed by taking the example of discriminating symmetric pure states. The measurement operators …

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Probabilistic quantum cloning of three equidistant states

Lan-Lan Li, Wen‐Hai Zhang, Chengyu Fan

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Discrimination of three symmetric states

Lan-Lan Li, Wen‐Hai Zhang, Ke Zhang, Cheng-Yu Fan

The quantum state discrimination problem is ubiquitous in quantum information and serves as the foundation for many quantum communication schemes proposed so far. This paper investigates the optimal discrimination of three symmetric quantum states with equal prior probabilities. To obtain completely accessible …

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General phase-covariant quantum cloning

Lan-Lan Li, Wen‐Hai Zhang, Ke Zhang, Cheng-Yu Fan

Phase-covariant quantum cloning has important applications in quantum cryptography. This paper proposes the unitary transformation of the optimal 1 → 2 general phase covariant quantum cloning in two dimensions and obtains the maximal fidelity of copies. In addition, an experimental scheme is …

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Phase-Space Evolution of Squeezing-Enhanced Light and Its Attenuation

Ke Zhang, Lan-Lan Li, Hong-Yi Fan

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Time evolution of coherent state’s photon number statistics in laser channel gained via cumulant calculation

Ke Zhang, Lan-Lan Li, Hong-Yi Fan

In this paper, by using the method of integration within the ordered product of operators and entangled state representation, the degree of second-order coherence of coherent state evolving in a laser channel is derived for the first time, which exhibits its anti-bunching …

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Cross section measurement of $e^+e^- \to p\bar{p}\eta$ and $e^+e^- \to p\bar{p}\omega$ at center-of-mass energies between 3.773 GeV and 4.6 GeV.

F. De Mori, Mikhail N. Achasov, P. Adlarson, S. Ahmed et autres

Based on $14.7~\textrm{fb}^{-1}$ of $e^+e^-$ annihilation data collected with the BESIII detector at the BEPCII collider at 17 different center-of-mass energies between $3.7730~\textrm{GeV}$ and $4.5995~\textrm{GeV}$, Born cross sections of the two processes $e^+e^- \to p\bar{p}\eta$ and $e^+e^- \to p\bar{p}\omega$ are measured for …

Cross section measurements of e+e−→K+K−K+K− and ϕK+K− at center-of-mass energies from 2.10 to 3.08 GeV

Mikhail N. Achasov, P. Adlarson, S. Ahmed, M. Albrecht et autres

We measure the Born cross sections of the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{K}^{+}{K}^{\ensuremath{-}}$ at center-of-mass (c.m.) energies, $\sqrt{s}$, between 2.100 and 3.080 GeV. The data were collected using the BESIII detector at the BEPCII collider. An enhancement at $\sqrt{s}=2.232\text{ }\text{ }\mathrm{GeV}$ is observed, very close …

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