Classical and quantum-mechanical scaling of ionization from excited hydrogen atoms in single-cycle THz pulses

Chovancova, M.; Agueny, Hicham; Rørstad, Jørgen Johansen; Hansen, J. P.

doi:10.1103/physreva.96.023423

Cited by 8 publications

(14 citation statements)

References 27 publications

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“…Originally found in Ref. [26], as well as shown in Fig. 1 in the previous subsection, ionization probabilities from a classical calculation at a fixed n of 15 are different from a quantum calculations for n = 15.…”

Section: B Comparisons Between Quantum and Classical Methodsmentioning

confidence: 72%

“…The first form was introduced in Ref. [26]. It is used in this paper to reinterpret some results from Ref.…”

Section: A Quantum Methodsmentioning

confidence: 99%

“…microcanonical ensemble treatment, in the classical calculation rather than just a fixed energy as used in Ref. [26].…”

Section: B Comparisons Between Quantum and Classical Methodsmentioning

confidence: 99%

“…All parameters are the same as those in Ref. [26] (with a small modification [31]). At other n, the pulse parameters are scaled using relations given in Eq.…”

Section: A Ionization Probabilities Versus Nmentioning

confidence: 99%

“…Different ionization thresholds can be found in different ionization regimes [24]. For ionization due to a single-cycle pulse, only a few studies have been conducted, including experimental [1] and theoretical studies [10,11,25,26]. These studies focused on the ionization probability versus initial pulse parameters or initial state nl of the Rydberg electron.…”

Section: Introductionmentioning

confidence: 99%

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Ionization from Rydberg atoms and wave packets by scaled terahertz single-cycle pulses

Wang

Robicheaux

2019

Phys. Rev. A

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The strong field ionization behavior when a Rydberg atom is exposed to a terahertz singlecycle pulse is studied. Fully three-dimensional time-dependent Schrödinger equation and classical trajectory Monte Carlo calculations are performed. Results from stationary eigenstates and Rydberg wave packets are presented, and it is found that the ionization properties can be different for the two cases. All of the pulse parameters and physical quantities are scaled versus the principal quantum number, n. The ionized electron's scaled radial, energy, and angular distributions are investigated for different n, and the quantum results are interpreted using a semiclassical method. The scaling relations of quantum interference amplitudes are discussed.

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Section: B Comparisons Between Quantum and Classical Methodsmentioning

confidence: 72%

“…The first form was introduced in Ref. [26]. It is used in this paper to reinterpret some results from Ref.…”

Section: A Quantum Methodsmentioning

confidence: 99%

“…microcanonical ensemble treatment, in the classical calculation rather than just a fixed energy as used in Ref. [26].…”

Section: B Comparisons Between Quantum and Classical Methodsmentioning

confidence: 99%

“…All parameters are the same as those in Ref. [26] (with a small modification [31]). At other n, the pulse parameters are scaled using relations given in Eq.…”

Section: A Ionization Probabilities Versus Nmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ionization from Rydberg atoms and wave packets by scaled terahertz single-cycle pulses

Wang

Robicheaux

2019

Phys. Rev. A

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Coherent electron displacement for quantum information processing using attosecond single cycle pulses

Agueny

2020

Sci Rep

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Coherent electron displacement is a conventional strategy for processing quantum information, as it enables to interconnect distinct sites in a network of atoms. The efficiency of the processing relies on the precise control of the mechanism, which has yet to be established. Here, we theoretically demonstrate a new route to drive the electron displacement on a timescale faster than that of the dynamical distortion of the electron wavepacket by utilizing attosecond single-cycle pulses. The characteristic feature of these pulses relies on a vast momentum transfer to an electron, leading to its displacement following a unidirectional path. The scenario is illustrated by revealing the spatiotemporal nature of the displaced wavepacket encoding a quantum superposition state. We map out the associated phase information and retrieve it over long distances from the origin. Moreover, we show that a sequence of such pulses applied to a chain of ions enables attosecond control of the directionality of the coherent motion of the electron wavepacket back and forth between the neighbouring sites. An extension to a two-electron spin state demonstrates the versatility of the use of these pulses. Our findings establish a promising route for advanced control of quantum states using attosecond single-cycle pulses, which pave the way towards ultrafast processing of quantum information as well as imaging.

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Spatial transport of electron quantum states with strong attosecond pulses

Chovancova¹,

Agueny²,

Førre³

et al. 2017

J. Opt.

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This thesis covers the topic in atomic physics: Interaction of a strong external field with Rydberg hydrogen atom. In three scientific publications, we have targeted physical processes such as the field ionization in the strong terahertz field, back-scattering in the Coulomb field and spatial transport of electrons. First two of them deal with the study of the ionization of the Rydberg atoms in the terahertz field. Rydberg atoms are highly excited stabilized states with very big dipole moments which makes them very sensitive to the external field. As external field we use THz radiation, submillimeter radiation in the range of 100 µm -1 mm, which generators are in the state-of-the-art development. Specifically, we treat with linearly polarized single-cycle pulses with high intensity and picosecond duration. High intensity and low frequency brings us to the strong field, where the field is so strong, that Coulomb potential may be deformed and field ionization is possible.

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Classical and quantum-mechanical scaling of ionization from excited hydrogen atoms in single-cycle THz pulses

Cited by 8 publications

References 27 publications

Ionization from Rydberg atoms and wave packets by scaled terahertz single-cycle pulses

Ionization from Rydberg atoms and wave packets by scaled terahertz single-cycle pulses

Coherent electron displacement for quantum information processing using attosecond single cycle pulses

Spatial transport of electron quantum states with strong attosecond pulses

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