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Full-Text Articles in Physical Sciences and Mathematics
Analytic Structure Of The S-Matrix For Singular Quantum Mechanics, Horacio E. Camblong, Luis N. Epele, Huner Fanchiotti, Carlos A. García Canal
Analytic Structure Of The S-Matrix For Singular Quantum Mechanics, Horacio E. Camblong, Luis N. Epele, Huner Fanchiotti, Carlos A. García Canal
Physics and Astronomy
The analytic structure of the S-matrix of singular quantum mechanics is examined within a multichannel framework, with primary focus on its dependence with respect to a parameter (Ω) that determines the boundary conditions. Specifically, a characterization is given in terms of salient mathematical and physical properties governing its behavior. These properties involve unitarity and associated current-conserving Wronskian relations, time-reversal invariance, and Blaschke factorization. The approach leads to an interpretation of effective nonunitary solutions in singular quantum mechanics and their determination from the unitary family.
Optical Memory Bandwidth And Multiplexing Capacity In The Erbium Telecommunication Window, J Dajczgewand, R Ahlefeldt, Thomas Böttger, A Louchet-Chauvet, J Gouët, T Chanelière
Optical Memory Bandwidth And Multiplexing Capacity In The Erbium Telecommunication Window, J Dajczgewand, R Ahlefeldt, Thomas Böttger, A Louchet-Chauvet, J Gouët, T Chanelière
Physics and Astronomy
Westudy the bandwidth and multiplexing capacity of an erbium-doped optical memory for quantum storage purposes.Weconcentrate on the protocol revival of a silenced echo because it has the largest potential multiplexing capacity. Our analysis is applicable to other protocols that involve strong optical excitation.Weshow that the memory performance is limited by instantaneous spectral diffusion and we describe how this effect can be minimized to achieve optimal performance.
Measurements Of Population Densities Of Metastable And Resonant Levels Of Argon Using Laser Induced Fluorescence, Milka Nikolic, J. Newton, C. I. Sukenik, L. Vušković, S. Popović
Measurements Of Population Densities Of Metastable And Resonant Levels Of Argon Using Laser Induced Fluorescence, Milka Nikolic, J. Newton, C. I. Sukenik, L. Vušković, S. Popović
Physics and Astronomy
We present a new approach to measure population densities of Ar I metastable and resonant excited states in low temperature Ar plasmas at pressures higher than 1 Torr. This approach combines the time resolved laser induced fluorescence technique with the kinetic model of Ar. The kinetic model of Ar is based on calculating the population rates of metastable and resonant levels by including contributions from the processes that affect population densities of Ar I excited states. In particular, we included collisional quenching processes between atoms in the ground state and excited states, since we are investigating plasma at higher pressures. …