Coulomb blockade in graphene quantum dots (2009)
Ma, Qiong, Tu, Tao, Lin, Zhi-Rong, Guo, Guang-Can, Guo, Guo-Ping
We study the conductance spectrum of graphene quantum dots, both single and multiple cases. The single electron tunneling phenomenon is investigated and the periodicity, amplitude and line shape of...
Substrate Modulated Graphene Quantum Dot (2009)
Ma, Qiong, Lin, Zhi-Rong, Tu, Tao, Guo, Guang-Can, Guo, Guo-Ping
We propose a new method to use gapped graphene as barrier to confine electrons in gapless graphene and form a good quantum dot, which can be realized on an oxygen-terminated $SiO_{2}$ substrate...
Coupling of light from an optical fiber taper into silver nanowires (2009)
Dong, Chun-Hua, Ren, Xi-Feng, Yang, Rui, Duan, Jun-Yuan, Guan, Jian-Guo, Guo, Guang-Can, ...
We report the coupling of photons from an optical fiber taper to surface plasmon modes of silver nanowires. The launch of propagating plasmons can be realized not only at ends of the nanowires, but...
Coupling of higher-mode-light into a single sliver nanowire (2009)
Guo, Guo-Ping, Yang, Rui, Ren, Xi-Feng, Wang, Lu-Lu, Shi, Hong-Yan, Hu, Bo, ...
Coupling of higher-order-mode light into a single sliver nanowire and the degree of the coupling can be controlled by adjusting the light polarization, showing that nanowire waveguide has no request...
Transmission of doughnut light through a bull's eye structure (2009)
Wang, Lu-Lu, Ren, Xi-Feng, Yang, Rui, Guo, Guang-Can, Guo, Guo-Ping
We experimentally investigate the extraordinary optical transmission of doughnut light through a bull's eye structure. Since the intensity is vanished in the center of the beam, almost all the energy...
Quantum Bus of Metal Nanowire with Surface Plasmon Polaritons (2009)
Guo, Guo-Ping, Lin, Zhi-Rong, Tu, Tao, Ren, Xi-Feng, Guo, Guang-Can
Plasmonic circuits, providing the ability to integrate electronics and optics on the nanoscale, may lead an exciting application to carry classical information between microprocessors in integrated...
Quantum computation with graphene nanoribbon (2008)
Guo, Guo-Ping, Lin, Zhi-Rong, Li, Xiao-Peng, Tu, Tao, Guo, Guang-Can
We propose a scalable scheme to implement quantum computation in graphene nanoribbon. It is shown that electron or hole can be naturally localized in each zigzag region for a graphene nanoribbon with...
Effect of Quantum Point Contact Measurement on Electron Spin State in Quantum Dot (2008)
Zhu, Fei-Yun, Zhu, Zhi-Cheng, Tu, Tao, Tu, Hua, Guo, Guang-Can, Guo, Guo-Ping
We study the time evolution of two electron spin states in a double quantum-dot system, which includes a nearby quantum point contact (QPC) as a measurement device. We obtain that the QPC measurement...
Numerical Studies of Quantum Hall Ferromagnetism in Two-Subband Systems (2008)
Hao, Xiao-Jie, Tu, Tao, Zhao, Yong-Jie, Guo, Guang-Can, Jiang, H. W., Guo, Guo-Ping
We carry out a numerical study of the quantum Hall ferromagnetism in a two-subband system using a set of experimental parameters in a recently experiment [X. C. Zhang, I. Martin, and H. W. Jiang,...
Generation of quantum-dot cluster states with superconducting transmission line resonator (2008)
Lin, Zhi-Rong, Guo, Guo-Ping, Tu, Tao, Zhu, Fei-Yun, Guo, Guang-Can
We propose an efficient method to generate cluster states in spatially separated double quantum dots with a superconducting transmission line resonator (TLR). When the detuning between the double-dot...
Guo, Guo-Ping, Zhang, Hui, Hu, Yong, Tu, Tao, Guo, Guang-Can
Realization of controllable interaction between distant qubits is one of the major problems in scalable solid state quantum computing. We study a superconducting transmission line resonator (TLR) as...
Interference of surface plasmon polaritions controlled by the phase of incident light (2007)
Ren, Xi-Feng, Guo, Guo-Ping, Huang, Yun-Feng, Wang, Zhi-Wei, Zhang, Pei, Guo, Guang-Can
Interference patterns of surface plasmon polaritons(SPPs) are observed in the extraordinary optical transmission through subwavelength holes in optically thick metal plate. It is found that the phase...
Polarization properties of subwavelength hole arrays consisting of rectangular holes (2007)
Ren, Xi-Feng, Zhang, Pei, Guo, Guo-Ping, Huang, Yun-Feng, Wang, Zhi-Wei, Guo, Guang-Can
Influence of hole shape on extraordinary optical transmission was investigated using hole arrays consisting of rectangular holes with different aspect ratio. It was found that the transmission could...
Scaling Behavior and Variable Hopping Conductivity in the Quantum Hall Plateau Transition (2007)
Tu, Tao, Zhao, Yong-Jie, Guo, Guo-Ping, Hao, Xiao-Jie, Guo, Guang-Can
We have measured the temperature dependence of the longitudinal resistivity $% \rho_{xx}$ of a two-dimensional electron system in the regime of the quantum Hall plateau transition. We extracted the...
Removal of surface plasmon polariton eigenmodes degeneracy (2007)
Ren, Xi-Feng, Guo, Guo-Ping, Zhang, Pei, Huang, Yun-Feng, Wang, Zhi-Wei, Guo, Guang-Can
The effect of the tilt angle of metal film on the transmissivity of subwavelength holes in optically thick metal film is investigated. The transmission efficiency is found can be highly dependent on...
Guo, Guo-Ping, Hao, Xiao-Jie, Tu, Tao, Zhu, Zhi-Cheng, Guo, Guang-Can
We propose a scheme to eliminate the effect of non-nearest-neighbor qubits in preparing cluster state with double-dot molecules. As the interaction Hamiltonians between qubits are Ising-model and...
Quantum Computation and Bell-state Measurement with Double-Dot Molecules (2007)
Zhang, Hui, Guo, Guo-Ping, Tu, Tao, Guo, Guang-Can
We propose a quantum computation architecture of double-dot molecules, where the qubit is encoded in the molecule two-electron spin states. By arranging the two dots inside each molecule...
Ren, Xi-Feng, Guo, Guo-Ping, Huang, Yun-Feng, Wang, Zhi-Wei, Guo, Guang-Can
Quadrate hole array is explored to study the influence of unsymmetrical periodicity on extraordinary optical transmission through periodic arrays of subwavelength holes. It is found that the...
One-step preparation of cluster states in quantum dot molecules (2006)
Guo, Guo-Ping, Zhang, Hui, Tu, Tao, Guo, Guang-Can
Cluster states, a special type of highly entangled states, are a universal resource for measurement-based quantum computation. Here, we propose an efficient one-step generation scheme for cluster...
Plasmon assisted transmission of high dimensional orbital angular momentum entangled state (2006)
Ren, Xi-Feng, Guo, Guo-Ping, Huang, Yun-Feng, Li, Chuan-Feng, Guo, Guang-Can
We present an experimental evidence that high dimensional orbital angular momentum entanglement of a pair of photons can be survived after a photon-plasmon-photon conversion. The information of...
Spatial mode properties of plasmon assisted transmission (2006)
Ren, Xi-Feng, Guo, Guo-Ping, Huang, Yun-Feng, Wang, Zhi-Wei, Guo, Guang-Can
Orbital angular momentum of photons is explored to study the spatial mode properties of plasmon assisted transmission process. We found that photons carrying different orbital angular momentums have...
Observation of the Preservation of the Two-Photon Coherence in Plasmon-assisted Transmission (2005)
Guo, Guo-Ping, Ren, Xi-Feng, Huang, Yun-Feng, Li, Chuan-Feng, Ou, Zhe-Yu, Guo, Guang-Can
We experimentally study two-photon coherence in plasmon-assisted transmission with a two-photon Mach-Zehnder (MZ) interferometer. Two collinear photons of identical or orthogonal polarization are...
Guo, Guo-Ping, Zhang, Hui, Guo, Guang-Can
By exploiting the fermionic qubit parity measurement, we present a scheme to realize quantum non-demolition (QND) measurement of Bell-states and generate n-party GHZ state in quantum dot. Compared...
Engineering of multi-dimensional entangled states of photon pairs using hyper-entanglement (2005)
Ren, Xi-Feng, Guo, Guo-Ping, Li, Jian, Li, Chuan-Feng, Guo, Guang-Can
Multi-dimensional entangled states have been proven to be more powerful in some quantum information process. In this paper, down-converted photons from spontaneous parametric down conversion(SPDC)...
Entanglement of the Hermite-Gaussian modes states of photons (2004)
Ren, Xi-Feng, Guo, Guo-Ping, Li, Jian, Guo, Guang-Can
We found that the Hermit-Gaussian(HG) modes of the down converted beams from the spontaneous parametric down conversion are quasi-conserved and the generated photon pairs are HG modes entangled for...
Orbital angular momentum of the down converted photons (2003)
Ren, Xi-Feng, Guo, Guo-Ping, Yu, Bo, Li, Jian, Guo, Guang-Can
We calculate the relative amplitude of orbital angular momentum (OAM) entangled photon pairs from the spontaneous parametric down conversion. The results show that the amplitude depends on both the...
Quantum data hiding with spontaneous parameter down-conversion (2003)
Here we analyze the practical implication of the existing quantum data hiding protocol with Bell states produced with optical downconverter. We show that the uncertainty for the producing of the Bell...
Quantum secret sharing without entanglement (2002)
After analysing the main quantum secret sharing protocol based on the entanglement states, we propose an idea to directly encode the qubit of quantum key distributions, and then present a quantum...
Preparation of multi-party entanglement of individual photons and atomic ensembles (2002)
An experimental feasible scheme is proposed to generate Greenberger-Horne-Zeilinger (GHZ) type of maximal entanglement. Distinguishing from the previous schemes, this entanglement can be chosen...
Entanglement of individual photon and atomic ensembles (2002)
Here we present an experimentally feasible scheme to entangle flying qubit (individual photon with polarization modes) and stationary qubit (atomic ensembles with long-lived collective excitations)....
Scheme for the preparation of the multi-particle entanglement in cavity QED (2001)
Guo, Guo-Ping, Li, Chuan-Feng, Li, Jian, Guo, Guang-Can
Here we present a quantum electrodynamics (QED) model involving a large-detuned single-mode cavity field and $n$ identical two-level atoms. One of its applications for the preparation of the...
Guo, Guo-Ping, Li, Chuan-Feng, Guo, Guang-Can
Quantun non-demolition (QND) variables are generlized to the nonlocal ones by proposing QND measurement networks of Bell states and multi-partite GHZ states, which means that we can generate and...
A novel quantum key distribution scheme with orthogonal product states (2001)
Guo, Guo-Ping, Li, Chuan-Feng, Shi, Bao-Sen, Li, Jian, Guo, Guang-Can
The general conditions for the orthogonal product states of the multi-state systems to be used in quantum key distribution (QKD) are proposed, and a novel QKD scheme with orthogonal product states in...