http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
General Theory of Decoherence of Qubit Systems in the Born-Markov Approximation
R. Joynt,Nguyen Bich Ha,Nguyen Hung Son,Ho Cong Son,Nguyen Dang Vu,Nguyen Van Hieu 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.1
The general theory of the decoherence of a two-level system as a qubit and a four-level system as a two-qubit system based on the Born-Markov approximation is presented. The derived formulae in the case of the two- level system are applied to two examples of the qubit: a system of electron states in a double quantum dot as a charge qubit and that of Zeeman split electron states in a quantum dot as a spin qubit. A generalization to the study of the decoherence of n-qubit systems is discussed.
Josephson Coupling and the Magnetism in d-wave Superconductors
BARK, Hongjun,JOYNT, Robert 東亞大學校 附設 基礎科學硏究所 1994 基礎科學硏究論文集 Vol.11 No.1
We discuss the effect of the magnetic order for the Josephson junction of a d-wave superconductor. The presence of the magnetic order in the basal plane of a uniaxial crystal breaks the symmetry of the system and thus removes a rotational degeneracy in the d-wave superconducting order parameter. We calculate an effective Josephson coupling constant in the Ginzburg-Landau theory, when the order parameters are misoriented across the junction. It is found that the critical current is a decreasing function of the misorientation angle in the weak coupling region. The model can be applied to the heavy fermion superconductor UPt₃, in particular.