132 citations · 318 across the 7 of their papers we have counts for
7 papers
A cryogenic continuously rotating half-wave plate for the POLARBEAR-2b cosmic microwave background receiver
C. A. Hill, A. Kusaka, P. Ashton +11
We present the design and laboratory evaluation of a cryogenic continuously rotating half-wave plate (CHWP) for the POLARBEAR-2b (PB-2b) cosmic microwave background (CMB) receiver,…
A large-diameter cryogenic rotation stage for half-wave plate polarization modulation on the POLARBEAR-2 experiment
Charles A. Hill, Akito Kusaka, Paul Barton +15
We describe the design of a cryogenic rotation stage (CRS) for use with the cryogenic half-wave plate (CHWP) polarization modulator on the POLARBEAR-2b and POLARBEAR-2c (PB2b/c) co…
Experiments towards quantum information with trapped Calcium ions
D. Leibfried, C. Roos, P. Barton +8
Ground state cooling and coherent manipulation of ions in an rf-(Paul) trap is the prerequisite for quantum information experiments with trapped ions. With resolved sideband coolin…
Sympathetic ground state cooling and coherent manipulation with two-ion-crystals
H. Rohde, S. T. Gulde, C. F. Roos +5
We have cooled a two-ion-crystal to the ground state of its collective modes of motion. Laser cooling, more specific resolved sideband cooling is performed sympathetically by illum…
Search for correlation effects in linear chains of trapped ions
C. J. S. Donald, D. M. Lucas, P. A. Barton +5
We report a precise search for correlation effects in linear chains of 2 and 3 trapped Ca+ ions. Unexplained correlations in photon emission times within a linear chain of trapped…
Ground state cooling, quantum state engineering and study of decoherence of ions in Paul traps
F. Schmidt-Kaler, Ch. Roos, H. C. Naegerl +12
We investigate single ions of in Paul traps for quantum information processing. Superpositions of the S electronic ground state and the metastable D sta…
Precision Measurement of the Lifetime of the 3d D_{5/2} state in 40Ca+
P. A. Barton, C. J. S. Donald, D. M. Lucas +3
We report a measurement of the lifetime of the 3d 2D_{5/2} metastable level in 40Ca+, using quantum jumps of a single cold calcium ion in a linear Paul trap. The 4s S_{1/2} - 3d D_…