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Quantum dynamics of spin- J particles in static and rotating magnetic fields: entanglement resonances and kinks.

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Title: Quantum dynamics of spin- J particles in static and rotating magnetic fields: entanglement resonances and kinks.
Authors: Sultana, Nargis1 (AUTHOR) nargis.sultana@students.iiserpune.ac.in, Seetharaman, Siddharth1 (AUTHOR), Nath, Rejish1 (AUTHOR)
Source: New Journal of Physics. 2026, Vol. 28 Issue 5, p1-25. 25p.
Subjects: Particle spin, Magnetic fields, Quantum information science, Dipole-dipole interactions, Quantum theory, Bose-Einstein condensation
Abstract: We examine the quantum dynamics of both a single spin- J particle and a pair of spin- J particles in the presence of static and rotating magnetic fields, which can be important for qudit-based quantum technologies. Notably, we find resonant, periodic oscillations between two maximally stretched states, irrespective of the value of J. Additionally, we observe periodic transitions between sublevels with magnetic quantum numbers of opposite signs. The dynamics also exhibit a periodic transfer of the spin to the maximally stretched state, starting from the ground state of the initial Hamiltonian. For a pair of spins, we derive various resonance conditions and further analyze the entanglement generated by dipole–dipole interactions. In the case of two spin-1/2 particles, the entanglement dynamics reveal resonances and kinks in the maximum entanglement, and their criteria can be obtained from the energy spectrum. Strikingly, we show that the kink can be exploited to engineer the entanglement dynamics. Finally, we briefly discuss the regime of weak dipolar interactions, which are relevant for dipolar Bose–Einstein condensates. [ABSTRACT FROM AUTHOR]
Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 193527418
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  Data: Quantum dynamics of spin- J particles in static and rotating magnetic fields: entanglement resonances and kinks.
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  Data: <searchLink fieldCode="AR" term="%22Sultana%2C+Nargis%22">Sultana, Nargis</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nargis.sultana@students.iiserpune.ac.in</i><br /><searchLink fieldCode="AR" term="%22Seetharaman%2C+Siddharth%22">Seetharaman, Siddharth</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nath%2C+Rejish%22">Nath, Rejish</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22New+Journal+of+Physics%22">New Journal of Physics</searchLink>. 2026, Vol. 28 Issue 5, p1-25. 25p.
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  Data: <searchLink fieldCode="DE" term="%22Particle+spin%22">Particle spin</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+information+science%22">Quantum information science</searchLink><br /><searchLink fieldCode="DE" term="%22Dipole-dipole+interactions%22">Dipole-dipole interactions</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+theory%22">Quantum theory</searchLink><br /><searchLink fieldCode="DE" term="%22Bose-Einstein+condensation%22">Bose-Einstein condensation</searchLink>
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  Label: Abstract
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  Data: We examine the quantum dynamics of both a single spin- J particle and a pair of spin- J particles in the presence of static and rotating magnetic fields, which can be important for qudit-based quantum technologies. Notably, we find resonant, periodic oscillations between two maximally stretched states, irrespective of the value of J. Additionally, we observe periodic transitions between sublevels with magnetic quantum numbers of opposite signs. The dynamics also exhibit a periodic transfer of the spin to the maximally stretched state, starting from the ground state of the initial Hamiltonian. For a pair of spins, we derive various resonance conditions and further analyze the entanglement generated by dipole–dipole interactions. In the case of two spin-1/2 particles, the entanglement dynamics reveal resonances and kinks in the maximum entanglement, and their criteria can be obtained from the energy spectrum. Strikingly, we show that the kink can be exploited to engineer the entanglement dynamics. Finally, we briefly discuss the regime of weak dipolar interactions, which are relevant for dipolar Bose–Einstein condensates. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1088/1367-2630/ae5fc5
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      – Code: eng
        Text: English
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        PageCount: 25
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    Subjects:
      – SubjectFull: Particle spin
        Type: general
      – SubjectFull: Magnetic fields
        Type: general
      – SubjectFull: Quantum information science
        Type: general
      – SubjectFull: Dipole-dipole interactions
        Type: general
      – SubjectFull: Quantum theory
        Type: general
      – SubjectFull: Bose-Einstein condensation
        Type: general
    Titles:
      – TitleFull: Quantum dynamics of spin- J particles in static and rotating magnetic fields: entanglement resonances and kinks.
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            NameFull: Sultana, Nargis
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            NameFull: Seetharaman, Siddharth
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            NameFull: Nath, Rejish
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          Dates:
            – D: 01
              M: 05
              Text: 2026
              Type: published
              Y: 2026
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              Value: 28
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              Value: 5
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            – TitleFull: New Journal of Physics
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