Iosif B. Khriplovich

Nuclear anapole moments

Abstract An approximate analytical expression is obtained for the parity violating electromagnetic, so-called anapole, moment of a spherical nucleus. The result iis confirmed by numerical computation in the Woods-Saxon potential for the nuclei 133 Cs, 203,205 Tl, 207 Pb, 209 Bi. The effective coupling constant of the electromagnetic P -odd electron-nucleus interaction constitutes 0.3–0.4 of the Fermi constant.

Feasibility of search for nuclear electric dipole moments at ion storage rings

Abstract A sensitivity of much better than 10 −24 e cm may be expected in the searches for electric dipole moments (EDM) of β-active nuclei at ion storage rings. This would represent a serious progress in studies of the CP-violation problem.

On the P- and T-nonconserving nuclear moments

Abstract The contribution of virtual excitations of paired nucleons to T-nonconserving nuclear moments caused by T-odd nuclear forces is shown to be comparable to the contribution of the external nucleon. Taking into account the contribution of paired nucleons in the 129Xe nucleus allows one to extract from atomic experiments the best limit on the P- and T-nonconserving nucleon-nucleon interactions. This limit approaches, by its implications, the limit on the neutron dipole moment. In the case of the P-nonconserving, but T-invariant, anapole nuclear moment the external nucleons excitations dominate.

Limit on the constant of T-nonconserving nucleon-nucleon interaction

Abstract T -odd moments of the xenon, mercury and thallium nuclei, due to T -nonconserving nuclear forces, are calculated. From the measurement of the electric dipole moment (EDM) of the 129 Xe atom we extract a limit on the T -noninvariant nucleon-nucleon interaction. This limit approaches in its implications the limit on the neutron EDM.

On the enhancement of parity nonconserving effects in diatomic molecules

Abstract Effects of parity nonconservation in molecules in the 2 Σ electron state can be used to detect anapole ( P -odd) nuclear moments. The magnitude of circular polarization of radiation in the microwave range reaches 10 -4 , 10 4 times larger than in the 2s state of hydrogen. Considerable enhancement arises as well in optical transitions. T -odd effects are also discussed.

Quantum Long-Range Interactions in General Relativity

We consider one-loop effects in general relativity that result in quantum long-range corrections to the Newton law, as well as to the gravitational spin-dependent and velocity-dependent interactions. Some contributions to these effects can be interpreted as quantum corrections to the Schwarzschild and Kerr metrics.

Superluminal velocity of photons in a gravitational background

Abstract The influence of radiative corrections on the photon propagation in a gravitational background is investigated without the low-frequency assumption ω ⪡ m . The conclusion is made in this way that the velocity of light can exceed unity.

The relation between the maximum entropy of a quantized surface and its area

The maximum entropy of a quantized surface is demonstrated to be proportional to the surface area in the classical limit. The result is valid in loop quantum gravity, and in a somewhat more general class of approaches to surface quantization. The maximum entropy is calculated explicitly for some specific cases.It is shown that the maximum entropy of a quantized surface in the classical limit is proportional to its area. The result is valid for the loop quantum gravitation as well as for a more general class of approaches to surface quantization. For some special cases, the maximum entropy is calculated in explicit form.

Transverse muon polarization in K±→π0μ±ν decay induced by the two-photon final-state interaction

Abstract We calculate the transverse muon polarization in the decay K±→π0μ±ν induced by the electromagnetic two-photon final-state interaction. For the central part of the Dalitz plot the typical value of this polarization is about 4×10−6.

Properties of the quantized gravitating dust shell

Abstract We investigate the quantum dynamics of a self-gravitating spherical dust shell. The wave functions of the discrete spectrum are not localized inside the Schwarzschild radius. We argue that such shells can transform into white holes (in another space). It is plausible that shells with bare masses larger than the Planck mass loose their mass emitting lighter shells.