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Electric dipole moment information


The electric field due to a point dipole (upper left), a physical dipole of electric charges (upper right), a thin polarized sheet (lower left) or a plate capacitor (lower right). All generate the same field profile when the arrangement is infinitesimally small.

The electric dipole moment is a measure of the separation of positive and negative electrical charges within a system: that is, a measure of the system's overall polarity. The SI unit for electric dipole moment is the coulomb-meter (C⋅m). The debye (D) is another unit of measurement used in atomic physics and chemistry.

Theoretically, an electric dipole is defined by the first-order term of the multipole expansion; it consists of two equal and opposite charges that are infinitesimally close together, although real dipoles have separated charge.[notes 1]
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Electric dipole moment

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Transition dipole moment

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{\displaystyle n} , is the electric dipole moment associated with the transition between the two states. In general the transition dipole moment is a complex vector...

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Neutron electric dipole moment

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electric dipole moment (nEDM), denoted dn, is a measure for the distribution of positive and negative charge inside the neutron. A nonzero electric dipole...

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Electron electric dipole moment

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electric dipole moment de is an intrinsic property of an electron such that the potential energy is linearly related to the strength of the electric field:...

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polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end...

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Magnetic dipole

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reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but the analogy is not perfect. In particular...

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Electron magnetic moment

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physics, the electron magnetic moment, or more specifically the electron magnetic dipole moment, is the magnetic moment of an electron resulting from its...

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Polarizability

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to an electric field, to acquire an electric dipole moment in proportion to that applied field. It is a property of particles with an electric charge...

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Debye

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(/dɛˈbaɪ/; Dutch: [dəˈbɛiə]) is a CGS unit (a non-SI metric unit) of electric dipole moment named in honour of the physicist Peter J. W. Debye. It is defined...

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Anomalous magnetic dipole moment

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placed in an external electric field, its molecules gain electric dipole moment and the dielectric is said to be polarized. Electric polarization of a given...

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standard deviations. The current experimental limit on the muon electric dipole moment, |dμ| < 1.9 × 10−19 e·cm set by the E821 experiment at the Brookhaven...

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Neutron

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electric dipole moment of the neutron. Currently, there are at least four experiments trying to measure for the first time a finite neutron electric dipole...

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Method of image charges

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an electric dipole moment p at ( 0 , 0 , a ) {\displaystyle (0,0,a)} above an infinite grounded conducting plane in the xy-plane is a dipole moment at...

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Toroidal moment

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particle must have a toroidal dipole moment, also known as an anapole moment, in addition to the usual electric and magnetic dipoles. The interaction of this...

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Electric field

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is the electric polarization – the volume density of electric dipole moments, and D is the electric displacement field. Since E and P are defined separately...

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Electric displacement field

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x {\displaystyle -x} are the same. This means that there is no dipole. If an electric field is applied to an insulator, then (for instance) the negative...

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Quadrupole

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with any multipole moment, if a lower-order moment, monopole or dipole in this case, is non-zero, then the value of the quadrupole moment depends on the choice...

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Multipole radiation

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That is, the electric field from the electric monopole moment scales as inverse distance squared. Likewise, the electric dipole moment creates a field...

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Magnetization

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magnetic dipole moments in a magnetic material. Accordingly, physicists and engineers usually define magnetization as the quantity of magnetic moment per unit...

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perturbation theory. Magnetic dipole transitions describe the dominant effect of the coupling of the magnetic dipole moment of the electron to the magnetic...

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magnetic moment is the magnetic moment of an atomic nucleus and arises from the spin of the protons and neutrons. It is mainly a magnetic dipole moment; the...

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Ultracold neutrons

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neutron electric dipole moment is a measure for the distribution of positive and negative charge inside the neutron. No neutron electric dipole moment has...

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Electric dipole transition

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An electric dipole transition is the dominant effect of an interaction of an electron in an atom with the electromagnetic field. Following reference,...

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Overtone band

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electric dipole moment of the molecule when it is vibrating. This change in the electric dipole moment of the molecule leads to the transition dipole...

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