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  2. Magnetic dipole–dipole interaction - Wikipedia

    en.wikipedia.org/wiki/Magnetic_dipoledipole...

    Magnetic dipoledipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles. Roughly speaking, the magnetic field of a dipole goes as the inverse cube of the distance, and the force of its magnetic field on another dipole goes as the first derivative of the magnetic field. It follows that ...

  3. Dicke model - Wikipedia

    en.wikipedia.org/wiki/Dicke_model

    Schematic representation of two schemes to experimentally realize the Dicke model: on the left, the equilibrium approach based on the dipole coupling between the two levels and, on the right, the nonequilibrium approach based on two-photon processes, namely stimulated Raman scattering. Only the latter scheme is used to realize the Dicke model.

  4. J-coupling - Wikipedia

    en.wikipedia.org/wiki/J-coupling

    In nuclear chemistry and nuclear physics, J-couplings (also called spin-spin coupling or indirect dipoledipole coupling) are mediated through chemical bonds connecting two spins. It is an indirect interaction between two nuclear spins that arises from hyperfine interactions between the nuclei and local electrons. [ 1 ]

  5. RKKY interaction - Wikipedia

    en.wikipedia.org/wiki/RKKY_interaction

    A schematic diagram of 4 electrons scattered by 4 magnetic atoms far apart. Each atom is at the center of decaying electron waves. The electrons mediate the interactions among the atoms, whose poles can flip because of the influence of other atoms and the surrounding electrons. Reproduced from [1] and [2].

  6. Spin–orbit interaction - Wikipedia

    en.wikipedia.org/wiki/Spin–orbit_interaction

    A key example of this phenomenon is the spin–orbit interaction leading to shifts in an electron's atomic energy levels, due to electromagnetic interaction between the electron's magnetic dipole, its orbital motion, and the electrostatic field of the positively charged nucleus.

  7. Intermolecular force - Wikipedia

    en.wikipedia.org/wiki/Intermolecular_force

    An example of a dipoledipole interaction can be seen in hydrogen chloride (HCl): the positive end of a polar molecule will attract the negative end of the other molecule and influence its position. Polar molecules have a net attraction between them. Examples of polar molecules include hydrogen chloride (HCl) and chloroform (CHCl 3).

  8. Dipolar compound - Wikipedia

    en.wikipedia.org/wiki/Dipolar_compound

    In organic chemistry, a dipolar compound or simply dipole is an electrically neutral molecule carrying a positive and a negative charge in at least one canonical description. In most dipolar compounds the charges are delocalized . [ 1 ]

  9. Residual dipolar coupling - Wikipedia

    en.wikipedia.org/wiki/Residual_dipolar_coupling

    For a fully oriented molecule, the dipolar coupling for an 1 H-15 N amide group would be over 20 kHz, and a pair of protons separated by 5 Å would have up to ~1 kHz coupling. However the degree of alignment achieved by applying magnetic field is so low that the largest 1 H- 15 N or 1 H- 13 C dipolar couplings are <5 Hz. [ 19 ]