scholarly journals Selective Rydberg pumping via strong dipole blockade

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Xiao-Qiang Shao
Keyword(s):  
Dipole Blockade ◽  
Strong Dipole

GENERATION OF GRAPH-STATE ENTANGLEMENT WITH ATOMIC ENSEMBLES VIA THE DIPOLE BLOCKADE MECHANISM

2011 ◽  
Vol 09 (01) ◽  
pp. 547-554
Author(s):  
HONG XIE ◽  
MEI-XIANG CHEN
Keyword(s):  
Dipole Interaction ◽  
Entangled State ◽  
Linear Optics ◽  
Atomic Ensembles ◽  
Graph State ◽  
Single Spin ◽  
Generating Graph ◽  
Spin Excitations ◽  
Dipole Blockade ◽  
The Many

A scheme is proposed for generating graph-state entanglement between many atomic ensembles. In this scheme, the photons are transferred from the single-"spin" excitations of the atomic ensembles via the dipole blockade mechanism, which act as ancillary qubits and interfere with each other on linear optics apparatus. The quantum-entangled state of the atomic ensembles can be obtained under the conditional detection of the photons. Since the single-"spin" excitations can be deterministically created via strong long-range dipole–dipole interaction and the transferred efficiency is enhanced by the many-atom interference effects, our scheme can work with a high probability of success.

scholarly journals Electrically controllable router of interlayer excitons

2020 ◽  
Vol 6 (41) ◽  
pp. eaba1830
Author(s):  
Yuanda Liu ◽  
Kévin Dini ◽  
Qinghai Tan ◽  
Timothy Liew ◽  
Kostya S. Novoselov ◽  
...  
Keyword(s):  
Transverse Electric ◽  
Transition Metal Dichalcogenides ◽  
Optoelectronic Devices ◽  
Optical Signals ◽  
Indirect Excitons ◽  
Telecommunication Technology ◽  
Metal Dichalcogenides ◽  
Long Lifetime ◽  
Efficient Coupling ◽  
Strong Dipole

Optoelectronic devices that allow rerouting, modulation, and detection of the optical signals would be extremely beneficial for telecommunication technology. One of the most promising platforms for these devices is excitonic devices, as they offer very efficient coupling to light. Of especial importance are those based on indirect excitons because of their long lifetime. Here, we demonstrate excitonic transistor and router based on bilayer WSe2. Because of their strong dipole moment, excitons in bilayer WSe2 can be controlled by transverse electric field. At the same time, unlike indirect excitons in artificially stacked heterostructures based on transition metal dichalcogenides, naturally stacked bilayers are much simpler in fabrication.

scholarly journals A radiation belt of energetic protons located between Saturn and its rings

Science ◽  
2018 ◽  
Vol 362 (6410) ◽  
pp. eaat1962 ◽  
Author(s):  
E. Roussos ◽  
P. Kollmann ◽  
N. Krupp ◽  
A. Kotova ◽  
L. Regoli ◽  
...  
Keyword(s):  
Radiation Belt ◽  
Cosmic Ray ◽  
High Energy ◽  
Radiation Belts ◽  
Exchange Reactions ◽  
Dipole Magnetic Field ◽  
Imaging Instrument ◽  
Multiple Charge ◽  
Strong Dipole ◽  
Dense Atmosphere

Saturn has a sufficiently strong dipole magnetic field to trap high-energy charged particles and form radiation belts, which have been observed outside its rings. Whether stable radiation belts exist near the planet and inward of the rings was previously unknown. The Cassini spacecraft’s Magnetosphere Imaging Instrument obtained measurements of a radiation belt that lies just above Saturn’s dense atmosphere and is decoupled from the rest of the magnetosphere by the planet’s A- to C-rings. The belt extends across the D-ring and comprises protons produced through cosmic ray albedo neutron decay and multiple charge-exchange reactions. These protons are lost to atmospheric neutrals and D-ring dust. Strong proton depletions that map onto features on the D-ring indicate a highly structured and diverse dust environment near Saturn.

KINETICS OF THE SPONTANEOUS DECAY IN COLD ATOMIC SYSTEMS

2020 ◽  
Author(s):  
Oleg Prepelita
Keyword(s):  
Emission Spectrum ◽  
Initial Temperature ◽  
Dipole Interaction ◽  
Time Profile ◽  
Spontaneous Decay ◽  
Spontaneous Transition ◽  
Atomic Systems ◽  
Leading Role ◽  
Kinetics Of ◽  
Strong Dipole

We discuss the spontaneous decay in a system of cold identical two-level atoms when, due to the strong dipole-dipole interaction, the collision-induced spontaneous decay plays the leading role in the process. We show that the time profile of the spontaneous transition is essentially non-exponential. Also, we argue that at a low initial temperature of the atomic system the spontaneous decay is accompanied by a strong heating caused by the inelastic atom-atom collisions. We show that the spontaneous emission spectrum is asymmetric. In addition, the width of the emission spectrum is a function of time. While atoms decay the emission spectrum becomes broader. The spectrum’s asymmetry and the atomic system’s heating have the same physical origin coming from the peculiarities of the atoms distribution function.

Bulk Motion of Galaxies and Hubble Flow Anisotropy on a Scale of 100 Mpc

2005 ◽  
Vol 201 ◽  
pp. 501-502
Author(s):  
S. L. Parnovsky ◽  
V. E. Karachentseva ◽  
Yu. N. Kudrya ◽  
I. D. Karachentsev
Keyword(s):  
Velocity Field ◽  
Large Scale ◽  
Spiral Galaxies ◽  
Dipole Component ◽  
Bulk Motion ◽  
Flow Anisotropy ◽  
Strong Dipole ◽  
Hubble Flow

We study a large-scale bulk motion of thin edge-on spiral galaxies from the RFGC catalogue using a multipole decomposition of velocity field. The quadrupole and octupole components are statistically significant. The first one corresponds to the Hubble flow anisotropy, the second one leads to decrease of modulus of dipole component due to the strong dipole-octupole interaction.

scholarly journals Controlling the Dipole Blockade and Ionization Rate of Rydberg Atoms in Strong Electric Fields

2020 ◽  
Vol 125 (10) ◽  
Author(s):  
Markus Stecker ◽  
Raphael Nold ◽  
Lea-Marina Steinert ◽  
Jens Grimmel ◽  
David Petrosyan ◽  
...  
Keyword(s):  
Electric Fields ◽  
Rydberg Atoms ◽  
Ionization Rate ◽  
Strong Electric Fields ◽  
Dipole Blockade

scholarly journals Tacticity Effect on Mesogen-Free Liquid Crystalline Self-assembly Induced by Strong Dipole–Dipole Interactions

2019 ◽  
Vol 52 (10) ◽  
pp. 3601-3611 ◽  
Author(s):  
Man-Hin Kwok ◽  
Bryan T. Seymour ◽  
Ruipeng Li ◽  
Morton H. Litt ◽  
Bin Zhao ◽  
...  
Keyword(s):  
Self Assembly ◽  
Liquid Crystalline ◽  
Dipole Interactions ◽  
Strong Dipole

scholarly journals Synthesis and X-Ray Crystal Structure of 1,1'-Bis(diphenyphosphino)ferrocene Supported CuSCF3 Complex

2019 ◽  
Vol 31 (8) ◽  
pp. 1877-1880
Author(s):  
Yi Yang ◽  
Gen Luo ◽  
Xia Tong ◽  
Yu-Mei Shu ◽  
Yu-Bing Zheng
Keyword(s):  
31P Nmr ◽  
Monoclinic Space Group ◽  
X Ray ◽  
X Ray Crystallography ◽  
R Factor ◽  
Secondary Interactions ◽  
Short Contacts ◽  
Strong Dipole ◽  
Cuprous Complex ◽  
Aromatic Hydrogen

We report herein the synthesis of CuSCF3 complex supported by 1,1'-bis(diphenyphosphino)ferrocene via deoxygenative reduction of Langlois reagent (CF3SO2Na). This cuprous complex [(dppf)Cu(SCF3)] was fully characterized by elemental analysis and 1H (13C, 19F, 31P) NMR spectra. In addition, the molecular structure of [(dppf)Cu(SCF3)] was established by X-ray crystallography. The crystal of compound 1 crystallizes in monoclinic, space group P21/n with a = 11.4366(9), b = 19.1340(16), c = 14.0625(11) Å, V = 3072.62(2) Å3, Z = 4, Z’ = 0, C35H28CuF3FeP2S, Mr = 719.00 and R-factor = 3.69. The short contacts between the two fluorine atoms of CF3S moiety and aromatic hydrogen of Cp/(Ph) rings were observed with leaving the sterically-congested fluorine untouched which highly resembled to the sibling [(PPh3)2CuSCF3]. These interesting secondary interactions in the crystal lattice were explained by the electrostatic forces in terms of the strong dipole of C-F bonds.

scholarly journals Improving the efficiency of organic photovoltaic cells by introducing an ultrathin modification layer with a strong dipole moment

2012 ◽  
Vol 57 (14) ◽  
pp. 1655-1658 ◽  
Author(s):  
GuangSheng Fu ◽  
WeiGuang Kong ◽  
LingJie Han ◽  
QiMan Yang ◽  
LiXin Hou ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Photovoltaic Cells ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells ◽  
Strong Dipole
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