Archive

Archive for September, 2011

Sep
14

Rotatory quantization of charge-conjugation symmetric systems.

3. Relativistic fields.

Zahid Zakir [1]

Abstract    

Quantum theory of complex fields with rotational modes based on a harmonic rotator model is constructed. For purely rotational modes the energy spectrum is equidistant, observables are automatically normal-ordered and there is no zero-point vacuum energy and zero-point charge. Frequencies of quanta are angular speeds of rotating field vectors (in real or field spaces). States of two signs of the helicity (particle-antiparticle) are related through the crossing symmetry. The well-known examples are photon field with circular polarization and complex fields. The spin and isospins of particles appear as related to their frequencies, representing angular momenta of rotations of field vectors with these frequencies. It is shown that the standard covariant perturbation theory is constructed in fact for description on the basis of harmonic rotators, where the recipe of transition from oscillatory to the rotatory representations of modes earlier it has been found empirically as normal-ordering of operators. The vacuum energy vanishes for free Hamiltonians and C-symmetric interactions.

PACS: 03.70. +k, 11.30.Er

Key words: quantization of fields, charge conjugation, parity, vacuum energy

Vol. 6, No 3, p. 48 – 63, v1,  14 December 2011

Online: TPAC: 4000-023 v2,  28 September 2012; DOI: 10.9751/TPAC.4000-023


[1] Centre for Theoretical Physics and Astrophyics, Tashkent, Uzbekistan

      zahidzakir@theor-phys.org

Sep
05

Rotatory quantization of charge-conjugation symmetric systems.

1. Harmonic oscillators

       Zahid Zakir [1]

Abstract    

In a system of a particle and antiparticle in the harmonic potential, represented as an oscillator with a complex generalized coordinate, there is a global U(1) symmetry and the charge conjugation (C) symmetry. It is shown that two pairs of ladder operators, introduced at the frequency decomposition of canonical variables, are not mutually charge-conjugate and that, therefore, their standard interpretation as operators of the charge-conjugate quanta breaks C-symmetry. Operator identities between bilinear products of the ladder operators are discovered, allowing expressing observables through charge-conjugate operators and it is correct to take into account C-symmetry. It is shown that these identities are maintained and at insert of the C-symmetric interactions. In a Lagrangian unsymmetrized and symmetrized orderings of complex conjugate operators of a momentum lead to different charge operators and are not equivalent at interaction with the gauge field. It is shown that due to C-symmetry conditions a zero-point charge does not arise in both orderings and in the first case a zero-point energy disappears also. The contribution of interaction with the gauge field and anharmonic potentials in higher orders of perturbation theory is considered. The same system also can be presented as a particle with positive and negative frequencies and, if to consider that a sign of mass of the particle coincides with a sign of its frequency, then the norm of negative frequency states remains positive.

PACS: 03.65.Ge, 11.30.Er, 1130.Ly, 11.90. +t

Key words: Hamiltonian dynamics, discrete symmetries, quantization

Vol. 6, No 2, p. 14 – 30, v1, 5 September 2011

Online: TPAC: 3900-021 v2, 28 September 2012; DOI: 10.9751/TPAC.3900-021

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[1] Centre for Theoretical Physics and Astrophyics, Tashkent, Uzbekistan

      zahidzakir@theor-phys.org

Sep
05

Rotatory quantization of charge-conjugation symmetric systems.

2. Harmonic and magneto-harmonic rotators

Zahid Zakir [1]

Abstract

     For soft rotators the lack of a radial component of velocity is a defining property and it allows to simplify quantization of harmonic and magneto-harmonic rotators. Operators of observables of soft rotators are normal ordered due to symmetries of the system, energy spectrum is linear under frequency and equidistant, and in the ground state there is no zero-point energy from rotational modes. It coincides with a generalization of the uncertainty relations for systems with non-hermitian canonical variables where the restrictions on fluctuations depend on state’s charge. Applications of the new formalism to quantization of waves at collective rotations of one-dimensional chain of harmonic rotators allows to model fields with charge-conjugation and gauge symmetries. For the rotating modes there is a crossing symmetry between states with opposite rotation directions, and arising of negative-frequency modes are positive-frequency states of antiquanta with replaced initial and final states. The commutators and causal correlators (propagators) of generalized coordinates of the harmonic rotator are derived.

PACS: 03.65.Ge, 11.30.Er, 1130.Ly, 11.90. + t

Key words: discrete symmetries, rotations, charge-conjugation symmetry, Landau levels, chain of rotators, propagators

Vol. 6, No 2, p. 31 – 47, v1,      5 September 2011

Online: TPAC: 3900-022 v2,  28 September 2012; DOI: 10.9751/TPAC.3900-022


[1] Centre for Theoretical Physics and Astrophyics, Tashkent, Uzbekistan

      zahidzakir@theor-phys.org