The Experts below are selected from a list of 21372 Experts worldwide ranked by ideXlab platform
S Hughes - One of the best experts on this subject based on the ideXlab platform.
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breakdown of the area theorem Carrier Wave rabi flopping of femtosecond optical pulses
Quantum Electronics and Laser Science Conference, 1999Co-Authors: S HughesAbstract:Summary form only. The development of high-intensity ultrashort optical pulses has lead to a number of fascinating nonlinear optical propagation studies including Rabi flopping, self-induced transparency, and photon echo, to name but a few. Common to the description of these effects, is that their propagation phenomena can be described quite adequately by employing the appropriate coupled matter-Maxwell equations within the slowly-varying-envelope approximation (SVEA), i.e., the envelopes of the electromagnetic field and polarization are assumed to vary little over an optical period and Wavelength. However, for several-cycle optical pulses this approximation becomes seriously questionable.
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breakdown of the area theorem Carrier Wave rabi flopping of femtosecond optical pulses
Physical Review Letters, 1998Co-Authors: S HughesAbstract:By solving Maxwell's curl equations coupled to a two-level atom, a theoretical study of Carrier-Wave Rabi flopping of femtosecond optical pulses of only several Carrier-cycles time duration is reported. For pulse areas of $2\ensuremath{\pi}$, the usual self-induced transparency regime is essentially recovered. However, for larger pulse areas, Carrier-Wave Rabi flopping occurs that manifests in local Carrier reshaping and subsequently to the production of significantly higher spectral components on the propagating pulse. These new features are not predicted by employing the area theorem or a slowly-varying-envelope approximation for the amplitude and phase terms\char22{}which is the usual approach.
Ferenc Krausz - One of the best experts on this subject based on the ideXlab platform.
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Carrier Wave rabi flopping signatures in high order harmonic generation for alkali atoms
Physical Review Letters, 2015Co-Authors: Marcello F Ciappina, J A Perezhernandez, A S Landsman, Tomas Zimmermann, Maciej Lewenstein, L Roso, Ferenc KrauszAbstract:We present a theoretical investigation of Carrier-Wave Rabi flopping in real atoms by employing numerical simulations of high-order harmonic generation (HHG) in alkali species. Given the short HHG cutoff, related to the low saturation intensity, we concentrate on the features of the third harmonic of sodium (Na) and potassium (K) atoms. For pulse areas of 2π and Na atoms, a characteristic unique peak appears, which, after analyzing the ground state population, we correlate with the conventional Rabi flopping. On the other hand, for larger pulse areas, Carrier-Wave Rabi flopping occurs, and is associated with a more complex structure in the third harmonic. These characteristics observed in K atoms indicate the breakdown of the area theorem, as was already demonstrated under similar circumstances in narrow band gap semiconductors.
Gameiro A.s. - One of the best experts on this subject based on the ideXlab platform.
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Prefilter bandwidth effects in Carrier Wave phase synchronizers
IEEE, 2026Co-Authors: Reis A.d., Carvalho J.p., Rocha J.f., Gameiro A.s.Abstract:This work studies the effects of the prefilter bandwidth on the Carrier Wave phase synchronizers. We consider three different prefilter bandwidths namely B1= ∞(infinite), B2=2.tx and B3=1.tx, where tx is the transmission rate. We consider also four Carrier Wave phase synchronizers, namely, the analog (ana), the hybrid (hib), the combinational (cmb), and the sequential (seq). The objective is to study the prefilter bandwidth with the four Carrier synchronizers and to evaluate their output jitter UIRMS (Unit Interval Root Mean Square) as function of the input SNR (Signal to Noise Ratio)
Nguyen Thanh Long - One of the best experts on this subject based on the ideXlab platform.
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the n order iterative schemes for a nonlinear kirchhoff Carrier Wave equation associated with the mixed inhomogeneous conditions
Applied Mathematics and Computation, 2009Co-Authors: Le Xuan Truong, Le Thi Phuong Ngoc, Nguyen Thanh LongAbstract:In this paper, a high-order iterative scheme is established in order to get a convergent sequence at a rate of order N(N>=1) to a local unique weak solution of a nonlinear Kirchhoff-Carrier Wave equation associated with mixed nonhomogeneous conditions - the boundary conditions are Dirichlet in one part and Robin in other part of boundary. On the other hand, some numerical results were presented.
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high order iterative schemes for a nonlinear kirchhoff Carrier Wave equation associated with the mixed homogeneous conditions
Nonlinear Analysis-theory Methods & Applications, 2009Co-Authors: Le Xuan Truong, Le Thi Phuong Ngoc, Nguyen Thanh LongAbstract:In this paper we consider the following nonlinear Wave equation (1){utt−μ(t,‖u(t)‖2,‖ux(t)‖2)uxx=f(x,t,u),0
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nonlinear kirchhoff Carrier Wave equation in a unit membrane with mixed homogeneous boundary conditions
Electronic Journal of Differential Equations (EJDE) [electronic only], 2005Co-Authors: Nguyen Thanh LongAbstract:In this paper we consider the nonlinear Wave equation problem utt Bkuk 2,kurk 2 ´ (urr + 1 ur) = f(r,t,u,ur), 0 < r < 1, 0 < t < T, ˛ lim r!0+ p ru r(r,t) ˛ < 1,
Marcello F Ciappina - One of the best experts on this subject based on the ideXlab platform.
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Carrier Wave rabi flopping signatures in high order harmonic generation for alkali atoms
Physical Review Letters, 2015Co-Authors: Marcello F Ciappina, J A Perezhernandez, A S Landsman, Tomas Zimmermann, Maciej Lewenstein, L Roso, Ferenc KrauszAbstract:We present a theoretical investigation of Carrier-Wave Rabi flopping in real atoms by employing numerical simulations of high-order harmonic generation (HHG) in alkali species. Given the short HHG cutoff, related to the low saturation intensity, we concentrate on the features of the third harmonic of sodium (Na) and potassium (K) atoms. For pulse areas of 2π and Na atoms, a characteristic unique peak appears, which, after analyzing the ground state population, we correlate with the conventional Rabi flopping. On the other hand, for larger pulse areas, Carrier-Wave Rabi flopping occurs, and is associated with a more complex structure in the third harmonic. These characteristics observed in K atoms indicate the breakdown of the area theorem, as was already demonstrated under similar circumstances in narrow band gap semiconductors.