Adiabatic Condition and Quantum Geometric Potential (2008)
Wu, Jianda, Zhao, Meisheng, Chen, Jianlan, Zhang, Yongde
In this paper, we present a U(1)-invariant expansion theory of the adiabatic process. As its application, we propose and discuss new sufficient adiabatic approximation conditions. In the new...
Graphical Nonbinary Quantum Error-Correcting Codes (2008)
Hu, Dan, Tang, Weidong, Zhao, Meisheng, Chen, Qing, Yu, Sixia, Oh, C. H.
In this paper, based on the nonbinary graph state, we present a systematic way of constructing good non-binary quantum codes, both additive and nonadditive, for systems with integer dimensions. With...
Is the quantum adiabatic theorem consistent? (2008)
Du, Jiangfeng, Hu, Lingzhi, Wang, Ya, Wu, Jianda, Zhao, Meisheng, Suter, Dieter
The quantum adiabatic theorem states that if a quantum system starts in an eigenstate of the Hamiltonian, and this Hamiltonian varies sufficiently slowly, the system stays in this eigenstate. We...
The fidelity of general bosonic channels with pure state input (2006)
Zhao, Meisheng, Qin, Tao, Zhang, Yongde
We first derive for the general form of the fidelity for various bosonic channels. Thereby we give the fidelity of different quantum bosonic channel, possibly with product input and entangled input...
The classical capacity for continuous variable teleportation channel (2006)
Qin, Tao, Zhao, Meisheng, Zhang, Yongde
The process of quantum teleportation can be considered as a quantum channel. The exact classical capacity of the continuous variable teleportation channel is given. Also, the channel fidelity is...
The classical capacity for the quantum Markov channel of continuous variables (2005)
Qin, Tao, Zhao, Meisheng, Zhang, Yongde
Quantum communications using continuous variables are quite mature experimental techniques and the relevant theories have been extensively investigated with various methods. In this paper, we study...