9,356 research outputs found
Algebraic Renormalization of Parity-Preserving QED_3 Coupled to Scalar Matter II: Broken Case
In this letter the algebraic renormalization method, which is independent of
any kind of regularization scheme, is presented for the parity-preserving QED_3
coupled to scalar matter in the broken regime, where the scalar assumes a
finite vacuum expectation value, . The model shows to be stable
under radiative corrections and anomaly free.Comment: 9 pages, latex, no figure
Unified single-photon and single-electron counting statistics: from cavity-QED to electron transport
A key ingredient of cavity quantum-electrodynamics (QED) is the coupling
between the discrete energy levels of an atom and photons in a single-mode
cavity. The addition of periodic ultra-short laser pulses allows one to use
such a system as a source of single photons; a vital ingredient in quantum
information and optical computing schemes. Here, we analyze and ``time-adjust''
the photon-counting statistics of such a single-photon source, and show that
the photon statistics can be described by a simple `transport-like'
non-equilibrium model. We then show that there is a one-to-one correspondence
of this model to that of non-equilibrium transport of electrons through a
double quantum dot nanostructure. Then we prove that the statistics of the
tunnelling electrons is equivalent to the statistics of the emitted photons.
This represents a unification of the fields of photon counting statistics and
electron transport statistics. This correspondence empowers us to adapt several
tools previously used for detecting quantum behavior in electron transport
systems (e.g., super-Poissonian shot noise, and an extension of the
Leggett-Garg inequality) to single-photon-source experiments.Comment: 8 pages, 3 figure
Doorway States and Billiards
Whenever a distinct state is immersed in a sea of complicated and dense
states, the strength of the distinct state, which we refer to as a doorway, is
distributed in their neighboring states. We analyze this mechanism for 2-D
billiards with different geometries. One of them is symmetric and integrable,
another is symmetric but chaotic, and the third has a capricious form. The fact
that the doorway-state mechanism is valid for such highly diverse cases, proves
that it is robust.Comment: 7 pages, 6 figures, Accepted in Proceedings of "Symmetries in
Nature", Symposium in Memoriam Marcos Moshinsk
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