Simultaneous cooling of axial vibrational modes in a linear ion-trap

Abstract

In order to use a collection of trapped ions for experiments where a well defined preparation of vibrational states is necessary, all vibrational modes have to be cooled to ensure precise and repeatable manipulation of the ions' quantum states. A method for simultaneous sideband cooling of all axial vibrational modes is proposed. By application of a magnetic field gradient the absorption spectrum of each ion is modified such that sideband resonances of different vibrational modes coincide. The ion string is then irradiated with monochromatic electromagnetic radiation, in the optical or microwave regime, for sideband excitation. This cooling scheme is investigated in detailed numerical studies. Its application for initializing ion strings for quantum information processing is extensively discussed.

16 pages, 10 figures

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• Quantum structural phase transition in chains of interacting atoms
• Coherent generation of EPR-entangled light pulses mediated by a single trapped atom
• Adiabatic quantum simulation with a segmented ion trap: Application to long-distance entanglement in quantum spin systems
• Thick-film technology for ultra high vacuum interfaces of micro-structured traps
• Optomechanical many-body cooling using frustration
• Radio-frequency sideband cooling and sympathetic cooling of trapped ions in a static magnetic field gradient
• Quasi-Perfect State Transfer in Spin Chains via Parametrization of On-Site Energies
• Enhancing laser sideband cooling in one-dimensional optical lattices via the dipole interaction
• State transfer analysis for linear spin chains with non-uniform on-site energies