365 citations
- California Institute of TechnologyUS4 papers
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53 papers
Challenges for String Gas Cosmology
Robert H. Brandenberger
In spite of the phenomenological successes of the inflationary universe scenario, the current realizations of inflation making use of scalar fields lead to serious conceptual probl…
Symmetric measurements attaining the accessible information
Thomas Decker
A theorem of Davies states that for symmetric quantum states there exists a symmetric POVM maximizing the mutual information. To apply this theorem the representation of the symmet…
How large can the first eigenvalue be on a surface of genus two?
D. Jakobson, M. Levitin, N. Nadirashvili +2
Sharp upper bounds for the first eigenvalue of the Laplacian on a surface of a fixed area are known only in genera zero and one. We investigate the genus two case and conjecture th…
On the Transfer of Metric Fluctuations when Extra Dimensions Bounce or Stabilize
T. J. Battefeld, S. P. Patil, R. H. Brandenberger
In this report, we study within the context of general relativity with one extra dimension compactified either on a circle or an orbifold, how radion fluctuations interact with met…
T-Duality and the Spectrum of Gravitational Waves
Paul Robert Chouha, Robert H. Brandenberger
In the inflationary universe scenario, the physical wavelength of cosmological fluctuation modes which are currently probed in observations was shorter than the Hubble radius, and…
Quantum nano-electromechanics with electrons, quasiparticles and Cooper pairs: effective bath descriptions and strong feedback effects
A. A. Clerk, S. Bennett
Using a quantum noise approach, we discuss the physics of both normal metal and superconducting single electron transistors (SET) coupled to mechanical resonators. Particular atten…