Research output: Contribution to journal › Article › peer-review
Relativistic electron-spin dynamics in a strong unipolar laser field. / Aleksandrov, I. A.; Tumakov, D. A.; Kudlis, A.; Shabaev, V. M.; Rosanov, N. N.
In: Physical Review A, Vol. 102, No. 2, 023102, 04.08.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Relativistic electron-spin dynamics in a strong unipolar laser field
AU - Aleksandrov, I. A.
AU - Tumakov, D. A.
AU - Kudlis, A.
AU - Shabaev, V. M.
AU - Rosanov, N. N.
PY - 2020/8/4
Y1 - 2020/8/4
N2 - The behavior of an electron spin interacting with a linearly polarized laser field is analyzed. In contrast to previous considerations of the problem, the initial state of the electron represents a localized wave packet, and a spatial envelope is introduced for the laser pulse along its propagation direction, which allows one to take into account the finite size of both objects. Special attention is paid to ultrashort pulses possessing a high degree of unipolarity. Within a classical treatment (both nonrelativistic and relativistic), proportionality between the change of the electron-spin projections and the electric-field area of the pulse is clearly demonstrated. We also perform calculations of the electron-spin dynamics according to the Dirac equation. Evolving the electron wave function in time, we compute the mean values of the spin operator in various forms. It is shown that the classical relativistic predictions are accurately reproduced when using the Foldy-Wouthuysen operator. The same results are obtained when using the Lorentz transformation and the nonrelativistic (Pauli) spin operator in the particle's rest frame.
AB - The behavior of an electron spin interacting with a linearly polarized laser field is analyzed. In contrast to previous considerations of the problem, the initial state of the electron represents a localized wave packet, and a spatial envelope is introduced for the laser pulse along its propagation direction, which allows one to take into account the finite size of both objects. Special attention is paid to ultrashort pulses possessing a high degree of unipolarity. Within a classical treatment (both nonrelativistic and relativistic), proportionality between the change of the electron-spin projections and the electric-field area of the pulse is clearly demonstrated. We also perform calculations of the electron-spin dynamics according to the Dirac equation. Evolving the electron wave function in time, we compute the mean values of the spin operator in various forms. It is shown that the classical relativistic predictions are accurately reproduced when using the Foldy-Wouthuysen operator. The same results are obtained when using the Lorentz transformation and the nonrelativistic (Pauli) spin operator in the particle's rest frame.
KW - INTENSE
KW - PARTICLE
KW - PULSES
KW - AREA
KW - POLARIZATION
KW - IONIZATION
KW - KINEMATICS
KW - GENERATION
KW - OPTICS
UR - http://www.scopus.com/inward/record.url?scp=85089874342&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/b14f2a4c-66e8-322b-80b6-dc5106c7efc1/
U2 - 10.1103/PhysRevA.102.023102
DO - 10.1103/PhysRevA.102.023102
M3 - Article
VL - 102
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 2
M1 - 023102
ER -
ID: 61441095