The refractive characteristics and intraocular tensions of colony chimpanzees Technical report, Aug. 1965

Refraction and intraocular pressure tests of colony chimpanzees - age relationshi

Ultrasound and phakometry measurements of the primate eye Technical report, Aug. 1965

Ultrasonic testing and phakometry measurements of primate ey

Polarization correlated photons from a positively charged quantum dot

Polarized cross-correlation spectroscopy on a quantum dot charged with a single hole shows the sequential emission of photons with common circular polarization. This effect is visible without magnetic field, but becomes more pronounced as the field along the quantization axis is increased. We interpret the data in terms of electron dephasing in the X+ state caused by the Overhauser field of nuclei in the dot. We predict the correlation timescale can be increased by accelerating the emission rate with cavity-QED

Batrachochytrium salamandrivorans

An Martel, University of Ghent, provided the micrograph of B. salamandrivorans, in which (left) Bsal sporangia in mTGhL media develop discharge tubes (arrow) to release zoospores, and (right) a scanning electron microscopic image of Bsal with rhizoids. Duncan Wilson and Matthew Fisher provided valuable comments.Peer reviewedPostprin

Synima : a Synteny imaging tool for annotated genome assemblies

Acknowledgements I would like to thank Chris Desjardins and Brian Haas for assistance and contributions to the ortholog prediction code and pipeline, and José Muñoz and anonymous reviewer 1 for code testing. Funding This work was supported by an MIT / Wellcome Trust Fellowship. Availability of data and materials Synima is open source and freely available from https://github.com/rhysf/ Synima under the MIT License. The download includes all example data presented in this manuscript.Peer reviewedPublisher PD

Observation of a two-dimensional spin-lattice in non-magnetic semiconductor heterostructures

Tunable magnetic interactions in high-mobility nonmagnetic semiconductor heterostructures are centrally important to spin-based quantum technologies. Conventionally, this requires incorporation of "magnetic impurities" within the two-dimensional (2D) electron layer of the heterostructures, which is achieved either by doping with ferromagnetic atoms, or by electrostatically printing artificial atoms or quantum dots. Here we report experimental evidence of a third, and intrinsic, source of localized spins in high-mobility GaAs/AlGaAs heterostructures, which are clearly observed in the limit of large setback distance (=80 nm) in modulation doping. Local nonequilibrium transport spectroscopy in these systems reveals existence of multiple spins, which are located in a quasi-regular manner in the 2D Fermi sea, and mutually interact at temperatures below 100 milliKelvin via the Ruderman-Kittel-Kasuya-Yosida (RKKY) indirect exchange. The presence of such a spin-array, whose microscopic origin appears to be disorder-bound, simulates a 2D lattice-Kondo system with gate-tunable energy scales.Comment: 7 pages + 4 figs. To appear in Nature Physics. This is the original submitted version. Final version will be posted six months after publication. The Supplementary Information can be downloaded from: http://www.physics.iisc.ernet.in/~arindam/Supplementary_Information_NPHYS-2006-08-0 0812B.pd

Free induction decay of a superposition stored in a quantum dot

We study the free evolution of a superposition initialized with high fidelity in the neutral-exciton state of a quantum dot. Readout of the state at later times is achieved by polarized photon detection, averaged over a large number of cycles. By controlling the fine-structure splitting (FSS) of the dot with a dc electric field, we show a reduction in the degree of polarization of the signal when the splitting is minimized. In analogy with the "free induction decay" observed in nuclear magnetic resonance, we attribute this to hyperfine interactions with nuclei in the semiconductor. We numerically model this effect and find good agreement with experimental studies. Our findings have implications for storage of superpositions in solid-state systems and for entangled photon pair emission protocols that require a small value of the FSS