2,306 research outputs found
Variable frequency photonic crystals
In this paper, we have firstly proposed a new one-dimensional variable
frequency photonic crystals (VFPCs), and calculated the transmissivity and the
electronic field distribution of VFPCs with and without defect layer, and
considered the effect of defect layer and variable frequency function on the
transmissivity and the electronic field distribution. We have obtained some new
characteristics for the VFPCs, which should be help to design a new type
optical devices.Comment: arXiv admin note: substantial text overlap with arXiv:1502.0511
A new one-dimensional variable frequency photonic crystals
In this paper, we have firstly proposed a new one-dimensional variable
frequency photonic crystals (VFPCs). We have calculated the transmissivity and
the electronic field distribution of VFPCs and compare them with the
conventional PCs, and obtained some new results, which should be help to design
a new type optical devices, and the two-dimensional and three-dimensional VFPCs
can be studied further.Comment: arXiv admin note: text overlap with arXiv:1301.6109 by other author
Two-photon spin states and entanglement states
In this paper, we have given the spin states of two-photon, which are
expressed by the quadratic combination of two single photon spin states, they
are a kind of quantum expression. Otherwise, we give all entanglement states of
two-photon, which are different from the xanzsd classical polarization vector
expression of two-photon entanglement state.Comment: arXiv admin note: text overlap with arXiv:1303.3406 by other author
Logical operation of one-dimensional photonic crystal based on series and parallel connection
In this paper, we have proposed the compound structure of one-dimensional
photonic crystal (PC), which includes series connection and parallel connection
PC. We have studied the transmission characteristics of series connection and
parallel connection PC, and obtained some new results. In addition, we have
proved the series connection one-dimensional PC can realize the logical AND
operation, and the parallel connection one-dimensional PC can realize the
logical OR operation. The compound structure of one-dimensional PC can design
more new type structure optical devices, and will provide the basic for
designing quantum computer.Comment: arXiv admin note: substantial text overlap with arXiv:1509.0382
Quantum Implementation of Unitary Coupled Cluster for Simulating Molecular Electronic Structure
In classical computational chemistry, the coupled-cluster ansatz is one of
the most commonly used methods, which is critically limited by its
non-unitary nature. The unitary modification as an ideal solution to the
problem is, however, extremely inefficient in classical conventional
computation. Here, we provide the first experimental evidence that indeed the
unitary version of the coupled cluster ansatz can be reliably performed in
physical quantum system, a trapped ion system. We perform a simulation on the
electronic structure of a molecular ion (HeH), where the ground-state
energy surface curve is probed, energies of excited-states are studied and the
bond-dissociation is simulated non-perturbatively. Our simulation takes
advantages from quantum computation to overcome the intrinsic limitations in
classical computation and our experimental results indicate that the method is
promising for preparing molecular ground-states for quantum simulation.Comment: 6 pages, 4 figure
Spinor wave equation of photon
In this paper, we give the spinor wave equations of free and unfree photon,
which are the differential equation of space-time one order. For the free
photon, the spinor wave equations are covariant, and the spinors are
corresponding to the the reducibility representations and
of the proper Lorentz group
Einstein-Podolsky-Rosen Steerability Criterion for Two-Qubit Density Matrices
We propose a sufficient criterion
to detect
Einstein-Podolsky-Rosen steering for arbitrary two-qubit density matrix
. Here are respectively the minimal and the
second minimal eigenvalues of , which is the partial transpose
of . By investigating several typical two-qubit states such as the
isotropic state, Bell-diagonal state, maximally entangled mixed state, etc., we
show this criterion works efficiently and can make reasonable predictions for
steerability. We also present a mixed state of which steerability always
exists, and compare the result with the violation of steering inequalities.Comment: 4 pages, 3 figure. 3 figures are added. Comments are welcom
The linear and nonlinear Jaynes-Cummings model for the multiphoton transition
With the Jaynes-Cummings model, we have studied the atom and light field
quantum entanglement of multiphoton transition, and researched the effect of
initial state superposition coefficient , the transition photon number
, the quantum discord and the nonlinear coefficient on the
quantum entanglement degrees. We have given the quantum entanglement degrees
curves with time evolution, and obtained some results, which should have been
used in quantum computing and quantum information.Comment: arXiv admin note: text overlap with arXiv:1404.0821, arXiv:1205.0979
by other author
The effect of defect layer on transmissivity and light field distribution in general function photonic crystals
We have theoretically investigated a general function photonic crystals
(GFPCs) with defect layer, and choose the line refractive index function for
two mediums and , and analyze the effect of defect layer's position,
refractive indexes and period numbers on the transmission intensity and the
electric field distribution. We obtain some new characters that are different
from the conventional PCs, which should be helpful in the design of photonic
crystals.Comment: arXiv admin note: substantial text overlap with arXiv:1207.3556,
arXiv:1205.1178, arXiv:1212.079
Three-electron spin states and entanglement states
In this paper, we have given the symmetrical and antisymmetrical spin and
space wave functions of three-electron, and further given the full total
entanglement states for the three-electron, which are related to their space
and spin wave function. When we study particles entanglement we not only
consider their spin entanglement and also consider their space entanglement.
Otherwise, we find that electrons entanglement are restricted to the teeny
range, when electrons exceed the space range, their entanglement should be
broken down even disappearance, which is accordance with the experiments
results
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