Zobrazeno 1 - 10
of 450
pro vyhledávání: '"Long, G. L."'
Publikováno v:
Phys. Rev. A 97, 042345 (2018)
The adiabatic evolution is the dynamics of an instantaneous eigenstate of a slowly varing Hamiltonian. Recently, an interesting phenomenon shows up that white noises can enhance and even induce adiabaticity, which is in contrast to previous perceptio
Externí odkaz:
http://arxiv.org/abs/1802.01420
Autor:
Huo, W. Y., Long, G. L.
We present a scalable scheme for superconducting charge qubits with the assistance of one-dimensional superconducting transmission line resonator (STLR) playing the role of data bus. The coupling between qubit and data bus may be turned on and off by
Externí odkaz:
http://arxiv.org/abs/quant-ph/0702104
Autor:
Al-Khudair, F. H., Long, G. L.
The low-energy level structure and electromagnetic transitions of $^{48,50}$Cr nuclei have been studied by using interacting boson model with isospin (IBM-3). A sequence of isospin excitation bands with isospin $(T= T_{z}$, $T_{z}+1$ and $ T_{z}+2) $
Externí odkaz:
http://arxiv.org/abs/nucl-th/0301060
Publikováno v:
Nucl.Phys. A723 (2003) 375-386
The octupole strengths of $\beta$-stable nucleus $^{208}_{82}Pb_{126}$, a neutron skin nucleus $^{60}_{20}Ca_{40}$ and a neutron drip line nucleus $^{28}_{8}O_{20}$ are studied by using the self-consistent Hartree-Fock calculation plus the random pha
Externí odkaz:
http://arxiv.org/abs/nucl-th/0211032
Publikováno v:
The Journal of Chemical Physics, 117, 3310 (2002)
Compared with classical search algorithms, Grover quantum algorithm [ Phys. Rev. Lett., 79, 325(1997)] achieves quadratic speedup and Bruschweiler hybrid quantum algorithm [Phys. Rev. Lett., 85, 4815(2000)] achieves an exponential speedup. In this pa
Externí odkaz:
http://arxiv.org/abs/quant-ph/0112161
Autor:
Xiao, L., Long, G. L.
Publikováno v:
Phys. Rev. A66,052320 (2002)
Searching a marked item or several marked items from an unsorted database is a very difficult mathematical problem. Using classical computer, it requires $O(N=2^n)$ steps to find the target. Using a quantum computer, Grover's algorithm uses $O(\sqrt{
Externí odkaz:
http://arxiv.org/abs/quant-ph/0112162
Publikováno v:
Phys. Rev. A65 (2002) 022304
Dense coding or super-dense coding in the case of high-dimension quantum states between two parties and multi-parties has been studied in this paper. We construct explicitly the measurement basis and the forms of the single-body unitary operations co
Externí odkaz:
http://arxiv.org/abs/quant-ph/0110112
Autor:
Long, G. L.
Publikováno v:
Phys. Rev. A64 (2001) 022307
In standard Grover's algorithm for quantum searching, the probability of finding the marked item is not exactly 1. In this Letter we present a modified version of Grover's algorithm that searches a marked state with full successful rate. The modifica
Externí odkaz:
http://arxiv.org/abs/quant-ph/0106071
Publikováno v:
J. Opt. B: quantum semiclass Opt. 3(2001) 376-381
Reconstruction of density matrices is important in NMR quantum computing. An analysis is made for a 2-qubit system by using the error matrix method. It is found that the state tomography method determines well the parameters that are necessary for re
Externí odkaz:
http://arxiv.org/abs/quant-ph/0012047
Autor:
Long, G. L., Yan, H. Y., Li, Y. S., Tu, C. C., Tao, J. X., Chen, H. M., Liu, M. L., Zhang, X., Luo, J., Xiao, L., Zeng, X. Z.
Publikováno v:
Phys. Lett. A286(2001)121-6
A generalized quantum search algorithm, where phase inversions for the marked state and the prepared state are replaced by $\pi/2$ phase rotations, is realized in a 2-qubit NMR heteronuclear system. The quantum algorithm searches a marked state with
Externí odkaz:
http://arxiv.org/abs/quant-ph/0009059