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Local characterization of one-dimensional topologically ordered states
Local characterization one-dimensional topologically ordered states
2016/1/23
We consider one-dimensional Hamiltonian systems whose ground states display symmetry-protected topological order. We show that ground states within the topological phase cannot be connected with each ...
Probe of Three-Dimensional Chiral Topological Insulators in an Optical Lattice
Three-Dimensional Chiral Topological Insulators Optical Lattice
2016/1/22
We propose a feasible experimental scheme to realize a three-dimensional chiral topological insulator with cold fermionic atoms in an optical lattice, which is characterized by an integer topological ...
Quantized electromagnetic response of three-dimensional chiral topological insulators
Quantized electromagnetic response three-dimensional chiral topological insulators
2016/1/22
Protected by the chiral symmetry, three-dimensional chiral topological insulators are characterized by an integer-valued topological invariant. How this invariant could emerge in physical observables ...
Berezinskii-Kosterlitz-Thouless Transition in Two-Dimensional Dipole Systems
Super fluid fluid dipolar bosons path integral monte carlo simulation high density temperature particle excitation spectrum
2014/12/18
The superfluid to normal fluid transition of dipolar bosons in two dimensions is studied in a broad density range by using path integral Monte Carlo simulations and summarized in the phase diagram. Wh...
Spatially probed electron-electron scattering in a two-dimensional electron gas
Spatially probed electron-electron two-dimensional electron gas
2010/11/17
Using scanning gate microscopy (SGM), we probe the scattering between a beam of electrons and a
two-dimensional electron gas (2DEG) as a function of the beam's injection energy, and distance from the...
Entanglement of two qubits mediated by one-dimensional plasmonic waveguides
Entanglement two qubits mediated one-dimensional plasmonic waveguides
2010/11/11
We investigate qubit-qubit entanglement mediated by plasmons supported by one-dimensional waveguides. We explore both the situation of spontaneous formation of entanglement from an unentangled state ...
Three dimensional study of harmonic operation at the Shanghai deep ultraviolet free electron laser
harmonic operation linear harmonic superradiant
2009/12/24
With the right choice of parameters in the free electron laser (FEL) scheme, the undulator can be primarily operated at high order harmonic modes and the harmonic radiation is expected to be significa...
Observation of two-dimensional superlattice solitons
two-dimensional superlattice soliton shallow waveguides superlattices
2010/4/8
We observe experimentally two-dimensional solitons in superlattices comprising alternating deep and shallow waveguides fabricated via the femtosecond laser direct writing technique. We find that the s...
Design and experimental study of a two-dimensional position sensitive X-ray detector
Garfield simulation X-ray detector MWPC
2009/8/14
A prototype of a two-dimensional position sensitive X-ray detector was designed and constructed for small angle X-ray scattering experiments at BSFR (Beijing Synchrotron Radiation Facility). The dete...
Two Electrons in Vertically Coupled One-Dimensional Rings
Quantum rings Two-electron energies Trigonometric sweep method
2010/9/25
A problem of two electrons spatially separated in vertically coupled one-dimensional rings is solved exactly by using the numerical trigonometric sweep method. The change of the level-ordering and the...
Effect of a Finite Number of Electrons on the Physical Properties of Two Dimensional Parabolic Quantum Dot
Finite Number of Electrons Physical Properties Two Dimensional Parabolic Quantum Dot
2010/4/9
The effect of number of particles on the physical properties of a two dimensional parabolic quantum dot system is investigated numerically at finite temperature. The Thomas-Fermi equation is solved se...
Dimensional Crossover in Semiconductor Structures: From 3D Electron Transport to Ballistic Electrons in 1D
Semiconductor Structures 3D Electron Transport Ballistic Electrons
2010/4/9
Modern semiconductor technologies have made possible special devices in which a gradual dimensional crossover may be induced by means of applied electric fields. Two specific examples are described. T...
Study of the Electron-Positron Annihilation Coincidence Peak Two-Dimensional Profile
the Electron-Positron Annihilation Coincidence Peak Two-Dimensional Profile aluminum Ge detectors
2010/10/26
Positron annihilation radiation profile in aluminum was observed with a pair of Ge detectors in coincidence. 22Na was used as a source of positron and the two-dimensional gamma energy spectrum was fit...
Carrier Transport and Band Offsets in Two Dimensional Heterostructures
Band Offsets Two Dimensional Heterostructures
2010/4/16
Advances in the low dimensional heterojunction device technology cannot be complete without adequate and reliable analytic model for determining interface properties such as band offsets needed to stu...
Weak Localization in Disordered Two-dimensional Crystals with Half-Filled Band
Weak Localization Disordered Two-dimensional Crystals Half-Filled Band
2010/4/16
Effect of subtitutional impurities on electron localization in two dimensional (2D) lattice near the middle of the band is studied. Calculation of density of the electronic states, r (\varepsilon ), i...