Frontiers of Physics

ISSN 2095-0462

ISSN 2095-0470(Online)

CN 11-5994/O4

2019 Impact Factor: 2.502

封面图片   2013年, 第8卷 第1期
The electric transport properties of low-dimensional systems have attracted tremendous interests due to their applications in microelectronics and novel nanodevices. Ultra-thin metal films on semiconductor substrates have been a playground for the study of electronic transport properties of low dimensional materials. However, the experimental measu [展开] ...
   优先出版

合作单位

2013年, 第8卷 第1期 出版日期:2013-02-01

选择: 合并摘要 显示/隐藏图片
REVIEW ARTICLE
Optical properties of one-dimensional soft photonic crystals with ferrofluids
Chun-Zhen Fan, Er-Jun Liang, Ji-Ping Huang
Frontiers of Physics. 2013, 8 (1): 1-19.  
https://doi.org/10.1007/s11467-013-0280-5

摘要   HTML   PDF (1485KB)

We review the recent theoretical study on the optical properties of one-dimensional soft photonic crystals (1D SPCs) with ferrofluids. The proposed structure is composed of alternating ferrofluid layers and dielectric layers. For the ferrofluid, single domain ferromagnetic nanoparticles can align to a chain under the stimuli of an external magnetic field, thus changing the microstructure of the system. Meanwhile, nonlinear optical responses in ferrofluids are also briefly reviewed.

参考文献 | 相关文章 | 多维度评价
RESEARCH ARTICLE
Demonstration of eight-partite two-diamond shape cluster state for continuous variables
Xiao-Long Su, Shu-Hong Hao, Ya-Ping Zhao, Xiao-Wei Deng, Xiao-Jun Jia, Chang-De Xie, Kun-Chi Peng
Frontiers of Physics. 2013, 8 (1): 20-26.  
https://doi.org/10.1007/s11467-013-0284-1

摘要   HTML   PDF (726KB)

Multipartite entangled state is the basic resource for implementing quantum information networks and quantum computation. In this paper, we present the experimental demonstration of the eightpartite two-diamond shape cluster states for continuous variables, which consist of eight spatially separated and entangled optical modes. Eight resource squeezed states of light with classical coherence are produced by four nondegenerate optical parametric amplifiers and then they are transformed to the eight-partite two-diamond shape cluster states by a specially designed linear optical network. Since the spatially separated multipartite entangled state can be prepared off-line, it can be conveniently applied in the future quantum technology.

参考文献 | 相关文章 | 多维度评价
Coherent manipulation of spin squeezing in atomic Bose-Einstein condensate via electromagnetically induced transparency
Song-Song Li, Ji-Bing Yuan, Le-Man Kuang
Frontiers of Physics. 2013, 8 (1): 27-33.  
https://doi.org/10.1007/s11467-013-0288-x

摘要   HTML   PDF (403KB)

We propose a scheme to coherently control spin squeezing of atomic Bose-Einstein condensate (BEC) via the technique of electromagnetically induced transparency (EIT). We study quantum dynamics of the mean spin vector and spin squeezing. It is shown that the mean spin vector and spin squeezing of the BEC can be controlled and manipulated by adjusting the external coupling fields or/and internal nonlinear interactions of the BEC. It is indicated that the spin squeezing can be generated rapidly in the dynamical process and maintained in a long time interval. It is found that a larger effective Rabi coupling between atoms and lasers can produce a stronger spin squeezing, and the squeezing can maintain a longer time interval.

参考文献 | 相关文章 | 多维度评价
Fluorescence emission from excited molecular ions in intense femtosecond laser fields
Yun-Chen Wang, Cheng-Yin Wu, Yuan-Xing Liu, Shao-Hua Xu, Qi-Huang Gong
Frontiers of Physics. 2013, 8 (1): 34-38.  
https://doi.org/10.1007/s11467-013-0281-4

摘要   HTML   PDF (224KB)

Strong fluorescence emissions were observed for nitrogen, carbon monoxide, and carbon dioxide molecules in intense femtosecond laser fields. These emissions can be assigned to the transitions of the molecular ions from the excited electronic states to the ground electronic states. The formation mechanisms were discussed and the lifetimes were measured for these excited molecular ions in intense laser fields.

参考文献 | 相关文章 | 多维度评价
Exact wave functions for atomic electron interacting with photon fields
Dong-Sheng Guo
Frontiers of Physics. 2013, 8 (1): 39-43.  
https://doi.org/10.1007/s11467-013-0283-2

摘要   HTML   PDF (170KB)

Many nonlinear quantum optical physics phenomena need more accurate wave functions and corresponding energy or quasienergy levels to account for. An analytic expression of wave functions with corresponding energy levels for an atomic electron interacting with a photon field is presented as an exact solution to the Schr?dinger-like equation involved with both atomic Coulomb interaction and electron-photon interaction. The solution is a natural generalization of the quantum-field Volkov states for an otherwise free electron interacting with a photon field. The solution shows that an N-level atom in light form stationary states without extra energy splitting in addition to the Floquet mechanism. The treatment developed here with computing codes can be conveniently transferred to quantum optics in classical-field version as research tools to benefit the whole physics community.

参考文献 | 相关文章 | 多维度评价
Strong localization across the metal-insulator transition at the Ag/Si(111)-(3×3)R30? interface
Yuan-Yuan Tang, Jian-Dong Guo
Frontiers of Physics. 2013, 8 (1): 44-49.  
https://doi.org/10.1007/s11467-013-0290-3

摘要   HTML   PDF (316KB)

We present the temperature dependent electrical transport measurements of Ag/Si(111)-(3×3)R30? by the in situ micro-four-point probe method integrated with scanning tunneling microscopy. The surface structure characterizations show hexagonal patterns at room temperature, which supports the inequivalent triangle (IET) model. A metal-insulator transition occurs at ~115 K.The lowtemperature transportmeasurements clearly reveal the strong localization characteristics of the insulating phase.

参考文献 | 相关文章 | 多维度评价
Andreev reflection and tunneling spectrum in a superlattice of metal-superconductor junctions
W. LiMing, Jia-Yun Luo, Xiao-Xue Cai, Ke Sha, Cheng-Ping Yin, Liang-Bin Hu
Frontiers of Physics. 2013, 8 (1): 50-54.  
https://doi.org/10.1007/s11467-013-0291-2

摘要   HTML   PDF (395KB)

The tunneling spectrum of an electron and a hole in a superlattice of NS junctions is computed using the BTK approach and the transfer matrix method. It shows sharp resonances at some energies above the superconducting gap. The sharper the resonance is the more layers the superlattice has. We find for the first time a mechanism to balance the incident and outgoing currents on the superlattice by averaging over the phase between the incident electron and the incident hole. This mechanism is more natural and physical than those in literatures.

参考文献 | 相关文章 | 多维度评价
Progress on tilted axis cranking covariant density functional theory for nuclear magnetic and antimagnetic rotation
Jie Meng (孟杰), Jing Peng (彭婧), Shuang-Quan Zhang (张双全), Peng-Wei Zhao (赵鹏巍)
Frontiers of Physics. 2013, 8 (1): 55-79.  
https://doi.org/10.1007/s11467-013-0287-y

摘要   HTML   PDF (1056KB)

Magnetic rotation and antimagnetic rotation are exotic rotational phenomena observed in weakly deformed or near-spherical nuclei, which are respectively interpreted in terms of the shears mechanism and two shearslike mechanism. Since their observations, magnetic rotation and antimagnetic rotation phenomena have been mainly investigated in the framework of tilted axis cranking based on the pairing plus quadrupole model. For the last decades, the covariant density functional theory and its extension have been proved to be successful in describing series of nuclear ground-states and excited states properties, including the binding energies, radii, single-particle spectra, resonance states, halo phenomena, magnetic moments, magnetic rotation, low-lying excitations, shape phase transitions, collective rotation and vibrations, etc. This review will mainly focus on the tilted axis cranking covariant density functional theory and its application for the magnetic rotation and antimagnetic rotation phenomena.

参考文献 | 相关文章 | 多维度评价
Loop quantum modified gravity and its cosmological application
Xiang-Dong Zhang, Yong-Ge Ma
Frontiers of Physics. 2013, 8 (1): 80-93.  
https://doi.org/10.1007/s11467-013-0277-0

摘要   HTML   PDF (286KB)

A general nonperturvative loop quantization procedure for metric modified gravity is reviewed. As an example, this procedure is applied to scalar-tensor theories of gravity. The quantum kinematical framework of these theories is rigorously constructed. Both the Hamiltonian and master constraint operators are well defined and proposed to represent quantum dynamics of scalar-tensor theories. As an application to models, we set up the basic structure of loop quantum Brans-Dicke cosmology. The effective dynamical equations of loop quantum Brans-Dicke cosmology are also obtained, which lay a foundation for the phenomenological investigation to possible quantum gravity effects in cosmology.

参考文献 | 相关文章 | 多维度评价
Lattice Boltzmann model for combustion and detonation
Bo Yan, Ai-Guo Xu, Guang-Cai Zhang, Yang-Jun Ying, Hua Li
Frontiers of Physics. 2013, 8 (1): 94-110.  
https://doi.org/10.1007/s11467-013-0286-z

摘要   HTML   PDF (862KB)

In this paper we present a lattice Boltzmann model for combustion and detonation. In this model the fluid behavior is described by a finite-difference lattice Boltzmann model by Gan et al. [Physica A, 2008, 387: 1721]. The chemical reaction is described by the Lee-Tarver model [Phys. Fluids, 1980, 23: 2362]. The reaction heat is naturally coupled with the flow behavior. Due to the separation of time scales in the chemical and thermodynamic processes, a key technique for a successful simulation is to use the operator-splitting scheme. The new model is verified and validated by well-known benchmark tests. As a specific application of the new model, we studied the simple steady detonation phenomenon. To show the merit of LB model over the traditional ones, we focus on the reaction zone to study the non-equilibrium effects. It is interesting to find that, at the von Neumann peak, the system is nearly in its thermodynamic equilibrium. At the two sides of the von Neumann peak, the system deviates from its equilibrium in opposite directions. In the front of von Neumann peak, due to the strong compression from the reaction product behind the von Neumann peak, the system experiences a sudden deviation from thermodynamic equilibrium. Behind the von Neumann peak, the release of chemical energy results in thermal expansion of the matter within the reaction zone, which drives the system to deviate the thermodynamic equilibrium in the opposite direction. From the deviation from thermodynamic equilibrium, Δm*, defined in this paper, one can understand more on the macroscopic effects of the system due to the deviation from its thermodynamic equilibrium.

参考文献 | 相关文章 | 多维度评价
10篇文章