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7 papers · 1 filter
Can closed timelike curves or nonlinear quantum mechanics improve quantum state discrimination or help solve hard problems?
Charles H. Bennett, Debbie Leung, Graeme Smith +1
We study the power of closed timelike curves (CTCs) and other nonlinear extensions of quantum mechanics for distinguishing nonorthogonal states and speeding up hard computations. I…
High performance single-error-correcting quantum codes for amplitude damping
Peter W. Shor, Graeme Smith, John A. Smolin +1
We construct families of high performance quantum amplitude damping codes. All of our codes are nonadditive and most modestly outperform the best possible additive codes in terms o…
Clumpy Galaxies in GOODS and GEMS: Massive Analogs of Local Dwarf Irregulars
Debra Meloy Elmegreen, Bruce G. Elmegreen, Max T. Marcus +3
Clumpy galaxies in the GEMS and GOODS fields are examined for clues to their evolution into modern spirals. The magnitudes of the clumps and the surface brightnesses of the intercl…
Extensive nonadditivity of privacy
Graeme Smith, John A. Smolin
Quantum information theory establishes the ultimate limits on communication and cryptography in terms of channel capacities for various types of information. The private capacity i…
Do Bars Drive Spiral Density Waves?
R. J. Buta, J. H. Knapen, B. G. Elmegreen +5
We present deep near-infrared K_s-band AAT IRIS2 observations of a selected sample of nearby barred spiral galaxies, including some with the strongest known bars. The sample covers…
How does the substrate affect the Raman and excited state spectra of a carbon nanotube?
Mathias Steiner, Marcus Freitag, James C. Tsang +4
We study the optical properties of a single, semiconducting single-walled carbon nanotube (CNT) that is partially suspended across a trench and partially supported by a SiO2-substr…