Raman Chirped Adiabatic Passage: a New Method for Selective Excitation of High Vibrational States

Chelkowski, Szczepan; Bandrauk, André D.

doi:10.1002/(sici)1097-4555(199706)28:6<459::aid-jrs124>3.0.co;2-y

Cited by 88 publications

(62 citation statements)

References 13 publications

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“…In the IR frequency domain short, chirped pulses have already been used in a number of applications, such as to control the populations of molecular vibrational and rotational states (see, e.g., Refs. [13][14][15][16][17][18]), to control ultracold atomic collisions [19], to control population transfer in few-level model atoms [20][21][22][23], to control the extent of the plateau cutoffs for both HHG [24,25] and above-threshold ionization (ATI) [26], to control the HHG process in order to produce single attosecond pulses [27], and to increase the intensity of the HHG spectrum using a two-color pump scheme [28]. Both ATI [29] and multiphoton ionization [30,31] by a short, chirped IR pulse have been found to be sensitive to the chirp of the pulse.…”

Section: Introductionmentioning

confidence: 99%

Perturbation-theory analysis of ionization by a chirped few-cycle attosecond pulse

2011

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The angular distribution of electrons ionized from an atom by a chirped few-cycle attosecond pulse is analyzed using perturbation theory (PT), keeping terms in the transition amplitude up to second order in the pulse electric field. The dependence of the asymmetry in the ionized electron distributions on both the chirp and the carrier-envelope phase (CEP) of the pulse are explained using a simple analytical formula that approximates the exact PT result. This approximate formula (in which the chirp dependence is explicit) reproduces reasonably well the chirp-dependent oscillations of the electron angular distribution asymmetries found numerically by Peng et al. [Phys. Rev. A 80, 013407 (2009)]. It can also be used to determine the chirp rate of the attosecond pulse from the measured electron angular distribution asymmetry.

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Section: Introductionmentioning

confidence: 99%

Perturbation-theory analysis of ionization by a chirped few-cycle attosecond pulse

2011

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“…There are also design methods based on physical intuition (e.g. [52,53]) and Lie algebraic decompositions (e.g. [54]), but we will not discuss these in any detail.…”

Section: Control Design Methodologiesmentioning

confidence: 99%

Control problems in quantum systems

Zhang

et al. 2012

Chin. Sci. Bull.

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The past decade or two has witnessed tremendous progress in theory and practice of quantum control technologies. Bridging different scientific disciplines ranging from fundamental particle physics to nanotechnology, the goal of quantum control has been to develop effective and efficient tools for common analysis and design, but more importantly would pave the way for future technological applications. This article briefly reviews basic quantum control theory from the perspective of modeling, analysis and design, as well as considers future research directions. quantum control, control theory, quantum physics Citation: Wu R B, Zhang J, Li C W, et al. Control problems in quantum systems. Chin Sci Bull, 2012Bull, , 57: 2194Bull, -2199Bull, , doi: 10.1007 Quantum control refers to the design of control strategies in systems that obey the principles of quantum mechanics, e.g. microscopic systems with few atoms or photons that were addressed early in the lecture "Plenty of Room at the Bottom" given by Richard Feynman in 1959 [1]. This dream has been pursued since 1960s right after the invention of lasers, which illuminated the hope to coherently control chemical reaction processes, but it was not until the end of 20th century when a burst of successes occurred in controlling ultrafast quantum dynamics. Nowadays, quantum control protocols are being introduced to more fields such as quantum information processing [2] and nanomaterials and nanodevices [3].The inherent power afforded quantum control results from the unique nonclassical features of quantum mechanics. Essentially, orthogonal eigenstates of a quantum observable (corresponding classically identifiable states) can form superpositions and thereby span a much larger space of quantum states available for coherent manipulation; quantum tunneling allows crossing of energy barriers without as much work as in classical mechanics, thus potentially improve sensitivity and controllability. However, there is no free lunch *Corresponding author (email: rbwu@tsinghua.edu.cn) on the other side; these advantages can only be exploited under extreme spatial (atomic or subatomic) and temporal (femtosecond and attosecond) physical scales. To realize the power of quantum control, vulnerable coherence and entanglement in quantum states need to be protected and measured before being destroyed by intermediate interacting environments. The earliest quantum control studies from the 1960s to the 1980s focused on (macroscopic) quantum ensembles in plasmas and laser devices, nuclear accelerators, and nuclear power plants [4] (mostly in former Soviet Union), in which the systems were modeled as quantum harmonic oscillators, which have little difference with those from classical systems [5, 6]. In the 1980s, Tarn's group completed a series of studies on general (linear or nonlinear) quantum systems in regard to modeling [7], controllability [8], invertibility [9], and quantum nondemolition filter problems [10]. In Europe, Belavkin's investigations [11][12][13] on the optimal estimat...

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“…Accordingly, we refrain from including results for triangular or sinusoidal pulses. It remains to be seen if chirped pulses could be designed to achieve more efficient target excitations in 2-D quantum dots [17][18][19][20][21][22][23].…”

Section: Dynamics Under Pulsed Fieldmentioning

confidence: 99%

Response dynamics of 2-D quantum dots in the presence of time-varying fields: Anharmonicity and pulse shape effects

2008

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Raman Chirped Adiabatic Passage: a New Method for Selective Excitation of High Vibrational States

Cited by 88 publications

References 13 publications

Perturbation-theory analysis of ionization by a chirped few-cycle attosecond pulse

Perturbation-theory analysis of ionization by a chirped few-cycle attosecond pulse

Control problems in quantum systems

Response dynamics of 2-D quantum dots in the presence of time-varying fields: Anharmonicity and pulse shape effects

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