Classical probabilities for Majorana and Weyl spinors. (English) Zbl 1227.81203
Author’s abstract: We construct a map between the quantum field theory of free Weyl or Majorana fermions and the probability distribution of a classical statistical ensemble for Ising spins or discrete bits. More precisely, a Grassmann functional integral based on a real Grassmann algebra specifies the time evolution of the real wave function \(q_\tau(t)\) for the Ising states \(\tau\). The time dependent probability distribution of a generalized Ising model obtains as \(p_\tau(t)=q_\tau^2(t)\). The functional integral employs a lattice regularization for single Weyl or Majorana spinors. We further introduce the complex structure characteristic for quantum mechanics. Probability distributions of the Ising model which correspond to one or many propagating fermions are discussed explicitly. Expectation values of observables can be computed equivalently in the classical statistical Ising model or in the quantum field theory for fermions.
Reviewer: Alexander V. Gemintern (Jerusalem)
MSC:
81R25 | Spinor and twistor methods applied to problems in quantum theory |
82B20 | Lattice systems (Ising, dimer, Potts, etc.) and systems on graphs arising in equilibrium statistical mechanics |
81T10 | Model quantum field theories |
15A75 | Exterior algebra, Grassmann algebras |
46T12 | Measure (Gaussian, cylindrical, etc.) and integrals (Feynman, path, Fresnel, etc.) on manifolds |
Keywords:
quantum theory from classical statistics; equivalence Ising models; fermionic quantum field theory; Grassmann functional integralReferences:
[1] | Wetterich, C., J. Phys., 174, 012008 (2009) |
[2] | Bell, J. S., Physica, 1, 195 (1964) |
[3] | Clauser, J.; Shimony, A., Rep. Prog. Phys., 41, 1881 (1978) |
[4] | N. Straumann. Available from: <arXiv:0801.4931>; N. Straumann. Available from: <arXiv:0801.4931> |
[5] | Wetterich, C., Ann. Phys., 325, 1359 (2010) · Zbl 1241.81076 |
[6] | C. Wetterich. Available from: <arXiv:1005.3972>; C. Wetterich. Available from: <arXiv:1005.3972> |
[7] | Wetterich, C., Ann. Phys., 325, 2750 (2010) · Zbl 1206.81117 |
[8] | C. Wetterich. Available from: <arXiv:1002.2593>; C. Wetterich. Available from: <arXiv:1002.2593> |
[9] | Mauro, D., Phys. Lett. A, 315, 28 (2003) · Zbl 1098.81791 |
[10] | Wetterich, C., Nucl. Phys. B, 211, 177 (1983) |
[11] | C. Wetterich. Available from: <arXiv:1002.3556>; C. Wetterich. Available from: <arXiv:1002.3556> |
[12] | Wetterich, C., (Elze, T., Decoherence and Entropy in Complex Systems (2004), Springer-Verlag), 180, Available from: |
[13] | Nielsen, H. B.; Ninomiya, M., Nucl. Phys. B, 185, 20 (1981) |
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