Generation of charge currents and magnetic pulses

Lumb, Sonia; Talwar, Shalini Lumb; Prasad, Vinod

doi:10.1088/1361-6455/abb258

Cited by 10 publications

(5 citation statements)

References 32 publications

(51 reference statements)

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“…Exploring these factors not only guides experimental researchers, but also motivates theoretical studies to test new models and mechanisms. In this context, some effects, such as noncentral interactions, laser pulses, external magnetic fields, external electric fields, and spherical confinement, offer significant outcomes [37][38][39][40]. The common outcome of most of these studies is to elucidate how the PC and IMF can be modified by external influences.…”

Section: Introductionmentioning

confidence: 99%

Persistent currents of ultrarelativistic plasma-encased endofullerene molecules entrapping a H atom

Bahar

2024

Commun. Theor. Phys.

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In this work, for the first time in the relevant literature, the persistent currents (pc) and induced magnetic fields (imf) of an endofullerene molecule guested a hydrogen atom, under a spherical confinement, are investigated. The endofullerene molecule is enclosed within a spherical region and embedded into a plasma environment. The plasma environment is depicted with the more general exponential cosine screened Coulomb (MGECSC) potential, and its relevant effects are analyzed by considering plasma screening parameters. The relevant model for endohedral confinement is the Woods-Saxon confinement potential, which is compatible with experimental data. The effects of various forms of Cn are thoroughly elucidated through the analysis of confinement depth, spherical shell thickness, the inner radius, and the smoothing parameters. To find the bound states in the spherically confined endofullerene, the decoupling of the second-order Dirac equation for the large and small components of the radial atomic wave functions is considered. The Dirac equation with the interaction potential is solved numerically by using the Runge-Kutta-Fehlberg method through the decoupling formalism. The influence of spin orientations on the pc and imf is also elucidated. The effects of spherical confinement, plasma shielding, and the structural properties of the fullerene on the pc and imf are thoroughly viewed. Moreover, under given physical conditions, the optimal ranges of these effects are determined.

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Section: Introductionmentioning

confidence: 99%

Persistent currents of ultrarelativistic plasma-encased endofullerene molecules entrapping a H atom

Bahar

2024

Commun. Theor. Phys.

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“…[13][14][15] The generated magnetic fields can be much larger than those obtained with traditional static fields. [16,17] Recently, based on an attosecond time scale, a new attosecond magnetization has been realized. [18][19][20][21][22][23][24][25] Much effort has been devoted to investigating the dependence of ultrafast magnetic field generation from coherent electronic currents in H + 2 on the laser parameters and molecular alignment.…”

Section: Introductionmentioning

confidence: 99%

Quantum control of ultrafast magnetic field in H32+ molecules by tricircular polarized laser pulses

He²,

Yang³

et al. 2023

Chinese Phys. B

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We present a scheme to control the generated ultrafast magnetic field in $\rm H_{3}^{2+}$ molecule by using multi-frequency tricircular pulses composed of co and counter-rotating bicircular pulses. Simulations show that the field amplitude and the wavelength are two significant factors on magnetic field generation by tricircular pulse. Specifically, the strength of magnetic field is linearly related to the field amplitude at $\lambda _{0}$=50 nm, while at $\lambda _{0}$=70 nm, the strength first increases and then decreases with the amplitude, which can be attributed to the resonance between the ground and excited states. Moreover, the phase and helicity of bicircular pulse were shown to have important effects on the magnetic field. The dependence of the magnetic field on the phase arises from the interference effect between multiple ionization pathways. These findings illustrate a guiding principle of controlling the magnetic field in molecular systems for future researches in ultrafast magneto-optics.

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“…Therefore, this potential has a wide application in 2D QRs and analytical solutions are possible. Lumb et al 42 studied the generation of charge currents and hence induced magnetic field in a spherically bound hydrogen atom in the presence of Hulth n potential by an ultrafast right circularly polarized laser pulse. Magnetic pulses(of the order of femtosecond) which have many biomedical applications are produced by the laser pulse employed 43 .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of persistent currents and magnetic fields in a two dimensional quantum ring

Prasad,

Arora,

Varsha

2023

Sci Rep

Self Cite

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We present the study of the SiGe quantum ring (QR) modeled by an anharmonic axially symmetric potential with a centrifugal core in the effective mass approximation. We show how the femtosecond laser pulses (FLPs) can be used efficiently for controlling the induced current and magnetic field. We have compared the strength of induced currents and magnetic fields with and without pulsed laser which shows a substantial change. The spin-orbit interaction (SOI) and Zeeman energy show a massive impact on the generation and enhancement of these induced current and magnetic fields. These induced currents and magnetic fields have many applications in interdisciplinary areas. We have shown that the SOI presence with the FLP fields while competing with the confinement strength lowers the strength of the induced current and field.

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Generation of charge currents and magnetic pulses

Cited by 10 publications

References 32 publications

Persistent currents of ultrarelativistic plasma-encased endofullerene molecules entrapping a H atom

Persistent currents of ultrarelativistic plasma-encased endofullerene molecules entrapping a H atom

Quantum control of ultrafast magnetic field in H32+ molecules by tricircular polarized laser pulses

Enhancement of persistent currents and magnetic fields in a two dimensional quantum ring

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