We investigate conditions under which multiatom absorption of a single photon leads to cooperative decay. Our analysis reveals the symmetry properties of the multiatom Dicke states underlying the cooperative decay dynamics and their spatio-temporal manifestations, particularly, the forward-directed spontaneous ...
NASA Astrophysics Data System (ADS)
The frequency shifts in emission and absorption arising from resonant many-body interactions in a system of two-level atoms are discussed from several points of view: (1) in the language of superradiance, Dicke states, quantum electrodynamics, and perturb...
National Technical Information Service (NTIS)
We propose a scheme to generate two-atom maximally entangled state in cavity quantum electrodynamics (QED). The scheme can be extended to generation of entangled multi-atom Dicke states if we control the interaction time of atoms with cavity modes. We use adiabatically state evolution under large atom-cavity detuning, so the scheme is insensitive to atomic ...
A phenomenon occurring in a near-resonant collision between two dissimilar atoms in the presence of a laser field is described. Owing to a collision-induced coherence, the adiabatic collisional dressed states are found to behave as superradiant and subradiant Dicke states, giving rise to a marked asymmetry in the far wings of the ...
Energy Citations Database
We present a scheme to generate arbitrary superpositions of Dicke states of excitons in optically driven quantum dots. The proposal is based on a sequence of laser pulses to control transitions between the nearest-neighbor Dicke states appropriately. It is shown that only N laser pulses are needed to generate ...
... decay. This is in strong contrast to the evolution of a symmetric Dicke state which is trapped for large atomic clouds. We ...
DTIC Science & Technology
We report the first experimental generation and characterization of a six-photon Dicke state. The produced state shows a fidelity of F=0.56+/-0.02 with respect to an ideal Dicke state and violates a witness detecting genuine six-qubit entanglement by 4 standard deviations. We confirm characteristic Dicke properties ...
PubMed
... Abstract : The objective of this research is to experimentally determine the effects of moisture absorption and elevated temperature on the dynamic ...
... Accession Number : ADP006822. Title : Jet Fluid Absorption and Dynamic Mechanical Analysis of Carbon Fibre Composites,. ...
Page 1. Page 2. Dynamic Cracking and Energy Absorption in Laminates Containing Through-Thickness Reinforcement ...
We propose a scheme for teleporting an arbitrary superposition of entangled Dicke states of any number of atoms (qubits) between two distant cavities. Our method relies on adiabatic passage using multi-atom dark states in each cavity, and a conditional detection of photons leaking out of both cavities. The ideal success probability of the protocol ...
... Accession Number : AD0429444. Title : THE GAMMA-ABSORPTION CROSS SECTION OF HOLMIUM IN THE DYNAMIC COLLECTIVE THEORY,. ...
... Ultrafast dynamics, such as the optical Stark effect, two photon absorption, and absorption bleaching, were readily observed. ...
... Landing Energy Absorption, Including the Effect of Penetration ... DIFFERENTIAL EQUATIONS, DYNAMIC LOADS, LUNAR LANDINGS, UNMANNED ...
... Absorption Equilibrium of Nitrogen Oxygen Mixtures and Dynamic Considerations on the Process of Oxygen Concentration by Molecular Sieves,. ...
... Accession Number : AD0729204. Title : Investigation of Laser Resonant Absorption for Gas Dynamics Measurements. Descriptive Note : Final rept. ...
... Accession Number : ADD854864. Title : Energy Absorption Mechanisms During Dynamic Fracturing of Fibre-Reinforced Composites. ...
A recently introduced family of multipartite entangled states, the 4-qubit phased Dicke states, has been created by 2-photon hyperentanglement. Our experimental method allows high state fidelity and generation rate. By introducing quantum noise in the multipartite system in a controlled way, we have tested the robustness of these states. To this purpose ...
of Dicke states Why are they useful for quantum information processing? Genuine multipartite entanglement 2 for quantum information processing? Genuine multipartite entanglement 2 Fidelity-based entanglement criterion #12;Motivation One of the main aims of quantum control is to look for and realize "interesting" highly entangled
E-print Network
... LOW VELOCITY, MOLECULAR DYNAMICS, GRAPHITIC FOAM, CARBON NANOTUBES, ACOUSTIC ABSORPTION, FLY ASH, VIBRATION. ...
... Descriptors : *VIBRATION ISOLATORS, DYNAMIC RESPONSE, DAMPING, RESONANCE ABSORPTION, ENERGY ABSORBERS, ENERGY ...
... MEASUREMENT, OPTICS, RADIATION, ABSORPTION, DYNAMIC RANGE, ADDITION, HARMONIC GENERATORS, NEODYMIUM LASERS, HIGH ...
... layers in the ionosphere (Chapman, 1931 ... equilibrium distribution of ozone corresponding to ... absorption at wavelengths where the depletion of solar ...
... The fluorescent spectrum of heavily doped ruby, the excitation spectrum of chromium doped spinels, and the absorption by chromium ions in the ...
... MOLECULAR SPECTROSCOPY, LASER INDUCED FLUORESCENCE, MOLECULAR ... ABSORPTION, ATOMIC SPECTROSCOPY, DISSOCIATION ...
... Numerical predictions of the resonant cavity and propagating plasma modes of microwave absorption are also discussed. ...
We propose a simple technique for the generation of arbitrary-sized Dicke states in a chain of trapped ions. The method uses global addressing of the entire chain by two pairs of delayed but partially overlapping laser pulses to engineer a collective adiabatic passage along a multi-ion dark state. Our technique, which is a many-particle generalization of ...
be monitored by measuring the transient absorption spectrum though a probe laser pulse that is variably delayedFemtosecond transient absorption dynamics of close-packed gold nanocrystal monolayer arrays q Sang Femtosecond transient absorption spectroscopy is used to investigate hot electron ...
... Abstract : A shock tube-driven gas dynamic laser operating at 10.6 micrometers has been used to study subsonic laser absorption waves. ...
We propose an experimentally accessible procedure for conditional preparation of highly nonclassical states of collective spin of an atomic ensemble. The quantum state engineering is based on a combination of quantum nondemolition interaction between atoms and light previously prepared in a non-Gaussian state using photon subtraction from squeezed vacuum beam, homodyne detection on the output ...
A study of the energy absorption mechanisms and fluid dynamic considerations for efficient conversion of high power laser radiation into a high velocity flow is presented. The objectives of the study are: (1) to determine the most effective absorption mec...
We study analytically and numerically vacuum Rabi oscillations of N identical two-level atoms moving through a single-mode lossless cavity. Equations of motion which take into account the atomic quantum correlations are obtained for the quantum mechanical expectation values in the strong-coupling, rotating-wave, pointlike, and Raman-Nath approximations. It is shown that moving atoms may ...
A holographic technique for studying induced absorption in transmitting media using a scheme with an additional phase measuring grating is described. A matrix analysis is conducted, and expressions for the induced absorption are derived from the asymmetry of the transmitted beam intensity variation. The dynamics of the induced ...
The thermoelastic strain accompanying absorption of pulsed laser radiation was modelled as a combination of elementary force dipoles. The elastic displacements due to each dipole component and the complete source were calculated using the dynamic elastic ...
... Title : IR Transition Moments and Collisional Dynamics of Vibrationally Excited OH Radicals via Time-Resolved Laser Absorption Spectroscopy. ...
... Reduction, Static tests, Packing density, Handling, Absorption, Absorbers( Materials), Cost analysis, Dynamic loads, Dynamic tests, Hazards ...
... of electronic absorption bands from classical equilibrium or nonequilibrium molecular dynamics (or equally for equilibrium systems from Monte ...
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS ... Absorption and utilization of low irradiance by cyanobacterial mats in two ...
NASA Website
... Abstract : A mechanical analog Vertical Energy Absorption Model (VEAM) is developed to predict the dynamics of an Air Cushion Landing System ...
... INTERACTION), *HELIUM, GAS FLOW, FLOATING BODIES, HEAT, ABSORPTION, LIMITATIONS, FLOW RATE, GASES, MICROWAVES ...
