Time-modulated meta-atoms

Local field modulated entanglment among three distant atoms

We extend the scheme for that proposed by S. Mancini and S. Bose (Phys. Rev. A 70, 022307(2004)) to the case of triple-atom. Under mean field approximation, we obtain an effective Hamiltonian of triplebody Ising-model interaction. Furthermore, we stress on discussing the influence of the existence of a third-atom on the two-atom entanglement and testing the modulation effects of locally applied...

Chiral meta-atoms rotated by light

We study the opto-mechanical properties of coupled chiral meta-atoms based on a pair of twisted split-ring resonators. By using a simple analytical model in conjunction with the Maxwell stress tensor, we capture insight into the mechanism and find that this structure can be used as a general prototype of subwavelength light-driven actuators over a wide range of frequencies. This coupled structu...

Resonant dynamics of arbitrarily shaped meta-atoms

Meta-atoms, nanoantennas, plasmonic particles, and other small scatterers are commonly modeled in terms of their modes. However these modal solutions are seldom determined explicitly, due to the conceptual and numerical difficulties in solving eigenvalue problems for open systems with strong radiative losses. Here these modes are directly calculated from Maxwell’s equations expressed in integra...

Ultracold atoms and precise time standards.

Experimental techniques of laser cooling and trapping, along with other cooling techniques, have produced gaseous samples of atoms so cold that they are, for many practical purposes, in the quantum ground state of their centre-of-mass motion. Such low velocities have virtually eliminated effects such as Doppler shifts, relativistic time dilation and observation-time broadening that previously l...

Computation With Adapted Time-Frequency Atoms