Measurement of the 1s − 2s energy interval in muonium
Physical Review Letters 84:6 (2000) 1136-1139
Abstract:
The 1s − 2s interval has been measured in the muonium(μ+e− atom by Doppler-free two-photon pulsed laser spectroscopy. The frequency separation of the states was determined to be 2 455 528 941.0(9.8) MHz, in good agreement with quantum electrodynamics. The result may be interpreted as a measurement of the muon-electron charge ratio as −1−1.1(2.1) × 10−9. We expect significantly higher accuracy at future high flux muon sources and from cw laser technology. © 2000 American Physical Society.Quantum computing with trapped ions, atoms and light
Fortschritte der Physik 48:9-11 (2000) 839-858
Abstract:
We first consider the basic requirements for a quantum computer, arguing for the attractiveness of nuclear spins as information-bearing entities, and light for the coupling which allows quantum gates. We then survey the strengths of and immediate prospects for quantum information processing in ion traps. We discuss decoherence and gate rates in ion traps, comparing methods based on the vibrational motion with a method based on exchange of photons in cavity QED. We then sketch the main features of a quantum computer designed to allow an algorithm needing 106 Toffoli gates on 100 logical qubits. We find that around 200 ion traps linked by optical fibres and high-finesse cavities could perform such an algorithm in a week to a month, using components at or near current levels of technology.Measurement of the lifetime of the 3d 2D5/2 state in 40Ca+ -: art. no. 032503
PHYSICAL REVIEW A 62:3 (2000) ARTN 032503
Search for correlation effects in linear chains of trapped Ca+ ions
EUROPHYSICS LETTERS 51:4 (2000) 388-394
Ratchet for cold rubidium atoms: The asymmetric optical lattice
PHYSICAL REVIEW LETTERS 82:4 (1999) 851-854