Entangling atoms in photonic crystals
Faculty of Mathematics & Physics, Comenius University, Mlynská dolina, 842 15
2 Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 842 28 Bratislava, Slovakia
3 Faculty of Informatics, Masaryk University, Botanická 68a, 602 00 Brno, Czech Republic
Published online: 15 May 2000
We propose a method for entangling a system of two-level atoms in photonic crystals. The atoms are assumed to move in void regions of a photonic crystal. The interaction between the atoms is mediated either via a defect mode or via a resonant dipole-dipole interaction. We show that these interactions can produce pure entangled atomic states. We analyze the problem with parameters typical for currently existing photonic crystals and Rydberg atoms and we show that the atoms can emerge from photonic crystals in entangled states. Depending on the linear dimensions of the crystal we estimate that a pair of atoms entangled in a photonic crystal can be separated by tens of centimeters.
PACS: 32.80.-t – Photon interactions with atoms / 42.50.-p – Quantum optics / 03.65.Bz – Foundations, theory of measurement, miscellaneous theories (including Aharonov-Bohm effect, Bell inequalities, Berry's phase)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000