Parity nonconservation under spin rotation of an atom (molecule) travelling in a laser wave

Baryshevsky, V.G.

doi:10.1016/0375-9601(93)90370-f

Cited by 5 publications

(14 citation statements)

References 6 publications

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“…Thus, measurement of ∆Φ and E B provides knowledge about the sum of quantities d, χ (24)) and for mixing ratio the sensitivity η T ∼ 10 −17 . This value for η T is significantly lower than the limitation for mixing ratio η T ∼ 10 −14 [7][8][9][10], which could be obtained from the results of measurements of atom dipole moment that have been done earlier (see, for example, [11]). …”

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confidence: 81%

Time-Reversal-Violating Generation of Static Magnetic and Electric Fields and a Problem of Electric Dipole Moment Measurement

Baryshevsky

2004

Phys. Rev. Lett.

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It is shown that in the experiments for search of EDM of an electron (atom, molecule) the T-odd magnetic moment induced by an electric field and the T-odd electric dipole moment induced by a magnetic field will be also measured. It is discussed how to distinguish these contributions.PACS numbers: 32.80. Ys, 11.30.Er, 33.55.Ad Nowadays there is an appreciable progress the in development of methods for ultraweak magnetic and electric field mesurement. Therefore, new experiments for measurement of an electric dipole moment d (EDM) of electrons (atoms, molecules) [1][2][3][4] are being prepared and carried out. The EDM of a particle exists if parity (P) and time-reversal (T) invariance are violated. Investigation of the EDM existence could provide knowledge about physics beyond the Standard Model [1][2][3][4].F.L.Shapiro's idea [5] to measure electron EDM by applying a strong electric field to a subtance that has an unpaired electron spin is being used for EDM search (see [1,6]).Interaction W E of an electric dipole moment d of an electron with an electric field E depends on their orientation:whereis the EDM. Spins of electrons (atoms) at low temperature appear to be polarized similar to the polarization (magnetization) of electrons by a magetic field in paramagnetic subtances due to the interaction W B of an electron (atom) magnetic moment µ with a magnetic field BSpins of electrons (atoms) polarized by an electric field induce the magnetic field B E and change in the magnetic flux Φ at the surface of a flat sheet of material [1]:where χ is the magnetic susceptibility, χ ≈ ρµa 2 3kB T , ρ is the number density of spins of interest, k B is Boltzmann's constant and T is the sample temperature. In the cases where simple Langevin paramagnetism is applicable, E * is the effective electric field at the location of the spins, µ a = g J(J + 1)µ B where µ B is the Bohr magneton, µ a is the atomic or ionic magnetic moment, g is Lande factor and A is the sample area.If an external magnetic field acts on either a para-or a ferromagnetic material, the spins in a substance become polarized due to substance magnetization. Therefore, the electric dipole moments appears polarized too. This results in the induction of an electric field E B (D.DeMille [1]):where P represents the degree that the spins are polarized in the sample. According to the analysis [1], modern methods for measurement of B E and E B provide sensitivity for electric dipole moment measurement about 10−32 e cm and in some cases even 10 −35 e cm. It is important to pay attention to another mechanism of time-reversal violating generation of magnetic and electric fields, which have been discussed in [7,8]. According to the idea of [7,8], an induced magnetic moment µ( E) of a particle appears due to the action of a field E under conditions of violation of P-and T-invariance (and similar, an

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confidence: 81%

Time-Reversal-Violating Generation of Static Magnetic and Electric Fields and a Problem of Electric Dipole Moment Measurement

Baryshevsky

2004

Phys. Rev. Lett.

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“…We can calculate the antisymmetrical part α a ik of the tensor of dynamical atom (molecule) polarizability α ik , and as a result, to obtain the expression for β T E by the following way. According to (4,6) the magnitude of the T-odd effect is determined by the polarizability β T E or (that is actually the same, see (2,6)) by the amplitude f ± (0) of elastic coherent scattering of a photon by an atom (molecule). When − → n E − → n γ the amplitude f ± (0) in dipole approximation can be written as f ± = ∓ ω 2 c 2 β T E .…”

Section: Let Photons With the Linear Polarizationmentioning

confidence: 99%

“…Let us estimate the magnitude of the T-odd photon plane rotation effect now. According to the analysis [4,5,6], based on the calculations of the value of T and P noninvariant interactions given by [7] the ratio…”

Section: Let Photons With the Linear Polarizationmentioning

confidence: 99%

“…2. In accordance with [4,5,6] the T-reversal violating dielectric permittivity tensor ε ik for an optical diluted matter ( ε ik − δ ik ≪ 1, δ ik is the Kronecker symbol) is given by…”

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confidence: 97%

“…However, that experiments have not been successful. At the present time novel more precise experimental schemes are actively discussed: observation of the atom [2] and neutron [3] electric dipole moment, T-violating (time reversal) atom (molecule) spin rotation in a laser wave and T-violating optical activity of an atomic or molecular gas [4,5].…”

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confidence: 99%

See 2 more Smart Citations

Phenomenon of the time-reversal-violating photon polarization plane rotation by an electric field

Baryshevsky¹

1999

Physics Letters A

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Time-reversal-violating optical gyrotropy in a medium exposed to electric and magnetic field

Baryshevsky

2002

Czech J Phys

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Parity nonconservation under spin rotation of an atom (molecule) travelling in a laser wave

Cited by 5 publications

References 6 publications

Time-Reversal-Violating Generation of Static Magnetic and Electric Fields and a Problem of Electric Dipole Moment Measurement

Time-Reversal-Violating Generation of Static Magnetic and Electric Fields and a Problem of Electric Dipole Moment Measurement

Phenomenon of the time-reversal-violating photon polarization plane rotation by an electric field

Time-reversal-violating optical gyrotropy in a medium exposed to electric and magnetic field

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