Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses
Nondipole terms in the atom–laser interaction arising due to the presence of a magnetic component in an electromagnetic wave and its inhomogeneity lead to the nonseparability of the center-of-mass (CM) and electron variables in the neutral atom and, as a consequence, to its acceleration. We investig...
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MDPI AG
2023-11-01
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| author | Vladimir S. Melezhik Sara Shadmehri |
| author_facet | Vladimir S. Melezhik Sara Shadmehri |
| author_sort | Vladimir S. Melezhik |
| collection | DOAJ |
| description | Nondipole terms in the atom–laser interaction arising due to the presence of a magnetic component in an electromagnetic wave and its inhomogeneity lead to the nonseparability of the center-of-mass (CM) and electron variables in the neutral atom and, as a consequence, to its acceleration. We investigate this effect and the accompanying excitation and ionization processes for the hydrogen atom in strong (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>12</mn></msup></semantics></math></inline-formula> – <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mo>×</mo><msup><mn>10</mn><mn>14</mn></msup></mrow></semantics></math></inline-formula> W/cm<sup>2</sup>) linearly polarized short-wavelength (5 eV <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>≲</mo><mo>ℏ</mo><mi>ω</mi><mo>≲</mo></mrow></semantics></math></inline-formula> 27 eV) electromagnetic pulses of about 8 fs duration. The study was carried out within the framework of a hybrid quantum-quasiclassical approach in which the coupled time-dependent Schrödinger equation for an electron and the classical Hamilton equations for the CM of an atom were simultaneously integrated. Optimal conditions with respect to the frequency and intensity of the electromagnetic wave for the acceleration of atoms without their noticeable ionization were found in the analyzed region. |
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| series | Photonics |
| spelling | doaj.art-fe3b7b2cbcd441e5896014b912c60f4d2023-12-22T14:32:39ZengMDPI AGPhotonics2304-67322023-11-011012129010.3390/photonics10121290Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic PulsesVladimir S. Melezhik0Sara Shadmehri1Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980, Moscow Region, RussiaBogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980, Moscow Region, RussiaNondipole terms in the atom–laser interaction arising due to the presence of a magnetic component in an electromagnetic wave and its inhomogeneity lead to the nonseparability of the center-of-mass (CM) and electron variables in the neutral atom and, as a consequence, to its acceleration. We investigate this effect and the accompanying excitation and ionization processes for the hydrogen atom in strong (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>12</mn></msup></semantics></math></inline-formula> – <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mo>×</mo><msup><mn>10</mn><mn>14</mn></msup></mrow></semantics></math></inline-formula> W/cm<sup>2</sup>) linearly polarized short-wavelength (5 eV <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>≲</mo><mo>ℏ</mo><mi>ω</mi><mo>≲</mo></mrow></semantics></math></inline-formula> 27 eV) electromagnetic pulses of about 8 fs duration. The study was carried out within the framework of a hybrid quantum-quasiclassical approach in which the coupled time-dependent Schrödinger equation for an electron and the classical Hamilton equations for the CM of an atom were simultaneously integrated. Optimal conditions with respect to the frequency and intensity of the electromagnetic wave for the acceleration of atoms without their noticeable ionization were found in the analyzed region.https://www.mdpi.com/2304-6732/10/12/1290nondipole effectsatomic accelerationquantum-quasiclassical approachstrong laser field |
| spellingShingle | Vladimir S. Melezhik Sara Shadmehri Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses Photonics nondipole effects atomic acceleration quantum-quasiclassical approach strong laser field |
| title | Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses |
| title_full | Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses |
| title_fullStr | Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses |
| title_full_unstemmed | Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses |
| title_short | Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses |
| title_sort | acceleration of neutral atoms by strong short wavelength short range electromagnetic pulses |
| topic | nondipole effects atomic acceleration quantum-quasiclassical approach strong laser field |
| url | https://www.mdpi.com/2304-6732/10/12/1290 |
| work_keys_str_mv | AT vladimirsmelezhik accelerationofneutralatomsbystrongshortwavelengthshortrangeelectromagneticpulses AT sarashadmehri accelerationofneutralatomsbystrongshortwavelengthshortrangeelectromagneticpulses |