ITAMP Lunch Seminar
Speaker: Giuseppe Calajo (Vienna)
Date: Thursday, September 14th
Time: 12:00-1:00 pm
Includes Pizza.
Title: Atom-light interactions in slow-light waveguide QED
Abstract: Slow-light waveguide QED refers to a regime where the maximal
photonic group velocity is significantly reduced compared to free
space. Such conditions could be achieved in one-dimensional
photonic periodic structures such as photonic crystals,
coupled-resonator arrays, modulated fibres, etc... In this talk I
will describe the main features of atom-light interactions in this
slow-light regime.
In the first part I will discuss the bound states formed by an atom
and a localized photonic excitation that represent the continuum
analog of the familiar dressed states in single-mode cavity QED. The
extension to the multi-photons and multi-atoms case is also
considered.
In the second part I will describe the coupling of moving atoms to
such slow-light waveguide in the regime where the atomic velocities
are comparable to the effective speed of light. In this case, the
interplay between a velocity-induced directionality and the emergence
of new divergencies in the photonic density of states gives rise to a
range of novel phenomena and nonperturbative effects in the emission
of photons and the resulting photon-mediated interactions between
moving atoms.
Location: B-106 @ Center for Astrophysics (60 Garden Street)
Directions: After entering the lobby of the CfA, turn right to enter the hallway of the B
building. In the hallway, turn right again, B-106 will be at the end of the hallway on the
left side.
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