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Coherent Manipulation of Motional States of a Single Trapped Ion

Alessandro S. Villar

NATO science for peace and security series. B, Physics and biophysicsSep 21, 20120 citations

Quantum state manipulation with trapped ions

Q. A. Turchette, B. E. King, Christopher J. Myatt +6 more

APSApr 1, 19980 citations

Sympathetic ground-state cooling and coherent manipulation with two-ion crystals

H. J. Rohde, S. Gulde, Christian F. Roos +5 more

We have cooled a two-ion crystal to the ground-state of its collective modes of motion. Laser cooling, more specifically resolved sideband cooling, is performed sympathetically by illuminating only one of the two 40 Ca + ions in the crystal. The heating rates of the motional modes of the crystal in our linear trap have been measured, and we found them considerably smaller than those previously reported by Turchette et al (2000 Phys.Rev. A 61 063418) in the case of trapped 9 Be + ions. After the ground state is prepared, coherent quantum state manipulation of the atomic population can be performed. Up to 12 Rabi oscillations are observed, showing that many coherent manipulations can be achieved. Coherent excitation of each ion individually and ground state cooling are important tools for the realization of quantum information processing in ion traps.We have cooled a two-ion crystal to the ground-state of its collective modes of motion. Laser cooling, more specifically resolved sideband cooling, is performed sympathetically by illuminating only one of the two 40 Ca + ions in the crystal. The heating rates of the motional modes of the crystal in our linear trap have been measured, and we found them considerably smaller than those previously reported by Turchette et al (2000 Phys.Rev. A 61 063418) in the case of trapped 9 Be + ions. After the ground state is prepared, coherent quantum state manipulation of the atomic population can be performed. Up to 12 Rabi oscillations are observed, showing that many coherent manipulations can be achieved. Coherent excitation of each ion individually and ground state cooling are important tools for the realization of quantum information processing in ion traps.

arXiv:quant-ph/0009031Journal of Optics B Quantum and Semiclassical OpticsJan 25, 200199 citations

Quantum State Control of Trapped Atomic and Molecular Ions

Christopher M. Seck

Jan 1, 20160 citations

Coherently manipulating cold ions in separated traps by their vibrational couplings

Miao Zhang, L. F. Wei

Recent experiments [K. R. Brown et al., Nature (London) 471, 196 (2011); M. Harlander et al., Nature (London) 471, 200 (2011)] have demonstrated the coherent manipulations on the external vibrations of two ions, confined individually in the separated traps. Using these recently developed techniques, we propose here an approach to realize the coherent operations, e.g., the universal quantum gates, between the separated ion-trap qubits encoded by two internal atomic states of the ions. Our proposal operates beyond the usual Lamb-Dicke limits and could be applied to the scalable ion traps coupled by their vibrations.Recent experiments [K. R. Brown et al., Nature (London) 471, 196 (2011); M. Harlander et al., Nature (London) 471, 200 (2011)] have demonstrated the coherent manipulations on the external vibrations of two ions, confined individually in the separated traps. Using these recently developed techniques, we propose here an approach to realize the coherent operations, e.g., the universal quantum gates, between the separated ion-trap qubits encoded by two internal atomic states of the ions. Our proposal operates beyond the usual Lamb-Dicke limits and could be applied to the scalable ion traps coupled by their vibrations.

arXiv:1103.5670Physical Review AJun 16, 20112 citations

Quantum State Manipulation Of Trapped Atomic Ions

David J. Wineland, Christopher R. Monroe, D. M. Meekhof +7 more

: A single laser-cooled and trapped Be ion is used to investigate methods of coherent 9 + quantum-state synthesis and quantum logic. We create and characterize nonclassical states of motion including "Schrödinger-cat" states. A fundamental quantum logic gate is realized which uses two states of the quantized ion motion and two ion internal states as qubits. We explore some of the applications for, and problems in realizing, quantum computation based on multiple trapped ions. V w V o 2 cos(6 T t) 1 # x 2 # y 2 R 2 , 2 (1) 1. INTRODUCTION Currently, a major theme in atomic, molecular, and optical physics is coherent control of quantum states. This theme is manifested in a number of topics such as atom interferometry, Bose-Einstein condensation and the atom laser, cavity QED, quantum computation, quantumstate engineering, wavepacket dynamics, and coherent control of chemical reactions. Here, we report related trapped-ion research at NIST which is devoted primarily to a...: A single laser-cooled and trapped Be ion is used to investigate methods of coherent 9 + quantum-state synthesis and quantum logic. We create and characterize nonclassical states of motion including "Schrödinger-cat" states. A fundamental quantum logic gate is realized which uses two states of the quantized ion motion and two ion internal states as qubits. We explore some of the applications for, and problems in realizing, quantum computation based on multiple trapped ions. V w V o 2 cos(6 T t) 1 # x 2 # y 2 R 2 , 2 (1) 1. INTRODUCTION Currently, a major theme in atomic, molecular, and optical physics is coherent control of quantum states. This theme is manifested in a number of topics such as atom interferometry, Bose-Einstein condensation and the atom laser, cavity QED, quantum computation, quantumstate engineering, wavepacket dynamics, and coherent control of chemical reactions. Here, we report related trapped-ion research at NIST which is devoted primarily to a...

Jan 1, 199627 citations

Coherent Quantum State Manipulation of Trapped Atomic Ions

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