Chris Vale

Measurements of binding energies of p-wave Feshbach molecules in a gas of 6Li (2008)

Ticknor, Christopher, Fuchs, Jurgen, Dyke, Paul, Veeravalli, Gopi, Kuhnle, Eva, Rowlands, Wayne, ...

We present measurements of the binding energies of 6Li p-wave Feshbach molecules in the three resonances of the two lowest hyperfine states. We find the binding energy scales linearly with magnetic...

Measurements of binding energies of p-wave Feshbach molecules in a gas of 6Li (2008)

Ticknor, Christopher, Fuchs, Jurgen, Dyke, Paul, Veeravalli, Gopi, Kuhnle, Eva, Rowlands, Wayne, ...

We present measurements of the binding energies of 6Li p-wave Feshbach molecules in the three resonances of the two lowest hyperfine states. We find the binding energy scales linearly with magnetic...

CMB Cluster Lensing: Cosmography with the Longest Lever Arm (2007)

Hu, Wayne, Holz, Daniel E., Vale, Chris

We discuss combining gravitational lensing of galaxies and the cosmic microwave background (CMB) by clusters to measure cosmographic distance ratios, and hence dark energy parameters. Advantages to...

Cluster Mass Estimators from CMB Temperature and Polarization Lensing (2007)

Hu, Wayne, DeDeo, Simon, Vale, Chris

Upcoming Sunyaev-Zel'dovich surveys are expected to return ~10^4 intermediate mass clusters at high redshift. Their average masses must be known to same accuracy as desired for the dark energy...

Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys (2006)

Sefusatti, Emiliano, Vale, Chris, Kadota, Kenji, Frieman, Joshua

Galaxy cluster surveys will be a powerful probe of dark energy. At the same time, cluster abundance is sensitive to any non-Gaussianity of the primordial density field. It is therefore possible that...

Potential sources of contamination to weak lensing measurements: constraints from N-body simulations (2006)

Heymans, Catherine, White, Martin, Heavens, Alan, Vale, Chris, Van Waerbeke, Ludovic

We investigate the expected correlation between the weak gravitational shear of distant galaxies and the orientation of foreground galaxies, through the use of numerical simulations. This...

Local Pancake Defeats Axis of Evil (2005)

Vale, Chris

Among the biggest surprises revealed by COBE and confirmed by WMAP measurements of the temperature anisotropy of the CMB are the anomalous features in the 2-point angular correlation function on very...

Finding Clusters in SZ Surveys (2005)

Vale, Chris, White, Martin

We use simulated maps to investigate the ability of high resolution, low noise surveys of the CMB to create catalogues of Clusters of galaxies by detecting the characteristic signature imprinted by...

Large scale systematic signals in weak lensing surveys (2004)

Vale, Chris, Hoekstra, Henk, Van Waerbeke, Ludovic, White, Martin

We use numerical simulations to model the effect of seeing and extinction modulations on weak lensing surveys. We find that systematic fluctuations in the shear amplitude and source depth can give...

Weak Lensing of the CMB by Large-Scale Structure (2004)

Amblard, Alexandre, Vale, Chris, White, Martin

Several recent papers have studied lensing of the CMB by large-scale structures, which probes the projected matter distribution from $z=10^3$ to $z\simeq 0$. This interest is motivated in part by...

Cluster Lensing of the CMB (2004)

Vale, Chris, Amblard, Alexandre, White, Martin

We investigate what the lensing information contained in high resolution, low noise CMB temperature maps can teach us about cluster mass profiles. We create lensing fields and Sunyaev-Zel'dovich...

Simulations of weak gravitational lensing (2003)

White, Martin, Vale, Chris

We describe the simulation data produced by a pilot programme to compute mock weak gravitational lensing maps for a range of currently popular cosmological models by ray tracing through...

Simulating weak lensing by large scale structure (2003)

Vale, Chris, White, Martin

We model weak gravitational lensing of light by large-scale structure using ray tracing through N-body simulations. The method is described with particular attention paid to numerical convergence. We...

Imaging Inter-Edge State Scattering Centers in the Quantum Hall Regime (2000)

Woodside, Michael T., Vale, Chris, McEuen, Paul L., Kadow, C., Maranowski, K. D., Gossard, A. C.

We use an atomic force microscope tip as a local gate to study the scattering between edge channels in a 2D electron gas in the quantum Hall regime. The scattering is dominated by individual,...

Scanned Potential Microscopy of Edge States in a Quantum Hall Liquid (1999)

Woodside, Michael T., Vale, Chris, McCormick, Kent L., McEuen, Paul L., Kadow, C., Maranowski, K. D., ...

Using a low-temperature atomic force microscope as a local voltmeter, we measure the Hall voltage profile in a quantum Hall conductor in the presence of a gate-induced non-equilibrium edge state...