10,379 research outputs found
Dynamics of Magnetized Spherical Accretion Flows
Transonic accretion flow with self-consistent treatment of random magnetic
field is presented.Comment: in proceedings to "Astrophysics of Compact Objects", Huangshan,
China, 200
Detection of Majorana Kramers pairs using a quantum point contact
We propose a setup that integrates a quantum point contact (QPC) and a
Josephson junction on a quantum spin Hall sample, experimentally realizable in
InAs/GaSb quantum wells. The confinement due to both the QPC and the
superconductor results in a Kramers pair of Majorana zero-energy bound states
when the superconducting phases in the two arms differ by an odd multiple of
across the Josephson junction. We investigate the detection of these
Majorana pairs with the integrated QPC, and find a robust switching from normal
to Andreev scattering across the edges due to the presence of Majorana Kramers
pairs. This transport signature is expected to be exhibited in measurements of
differential conductance and/or current cross-correlation at low bias
Two Open Universes Connected by a Wormhole: Exact Solutions
In this paper I present a spacetime of two open universes connected by a
Lorentzian wormhole. The spacetime has the following features: (1) It can
exactly solve the Einstein equations; (2) The weak energy condition is
satisfied everywhere; (3) It has a topology of R^2\times T_g (g\ge 2); (4) It
has no event horizons.Comment: 10 pages, late
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