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- University of CambridgeGB110 papers
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18 papers · 1 filter
Separability of very noisy mixed states and implications for NMR quantum computing
S. L. Braunstein, C. M. Caves, R. Jozsa +3
We give a constructive proof that all mixed states of N qubits in a sufficiently small neighborhood of the maximally mixed state are separable. The construction provides an explici…
Precession of collimated outflows from young stellar objects
C. Terquem, J. Eisloffel, J. Papaloizou +1
We consider several protostellar systems where either a precessing jet or at least two misaligned jets have been observed. We assume that the precession of jets is caused by tidal…
The non-linear fluid dynamics of a warped accretion disc
G. I. Ogilvie
The dynamics of a viscous accretion disc subject to a slowly varying warp of large amplitude is considered. Attention is restricted to discs in which self-gravitation is negligible…
Pulse Sequences for NMR Quantum Computers: How to Manipulate Nuclear Spins While Freezing the Motion of Coupled Neighbours
N Linden, H Barjat, RJ Carbajo +1
We show how to divide a coupled multi-spin system into a small subset of ``active'' spins that evolve under chemical shift or scalar coupling operators, and a larger subset of ``sp…
Kinetic and Structural Evolution of Self-gravitating, Magnetized Clouds: 2.5-Dimensional Simulations of Decaying Turbulence
Eve C. Ostriker, Charles F. Gammie, James M. Stone
The molecular component of the Galaxy is comprised of turbulent, magnetized clouds, many of which are self-gravitating and form stars. To understand how these clouds' evolution may…
The response of accretion disks to bending waves: angular momentum transport and resonances
Caroline E. J. M. L. J. Terquem
We investigate the linear tidal perturbation of a viscous Keplerian disk by a companion star orbiting in a plane inclined to the disk. We consider m=1 perturbations with odd symmet…