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38 papers · 1 filter
Cooling many particles to very low temperatures
Almut Beige, Peter L. Knight, Giuseppe Vitiello
In a recent paper [Beige, Knight, and Vitiello, quant-ph/0404160], we showed that a large number N of particles can be cooled very efficiently using a bichromatic interaction. The…
Onset of classical behaviour after a phase transition
R. J. Rivers, F. C. Lombardo
We analyze the onset of classical behaviour in a scalar field after a continuous phase transition, in which the system-field, the long wavelength order parameter of the model, inte…
General Relativity Histories Theory
Ntina Savvidou
The canonical description is based on the prior choice of a spacelike foliation, hence making a reference to a spacetime metric. However, the metric is expected to be a dynamical,…
Multi-particle entanglement manipulation under positive partial transpose preserving operations
Satoshi Ishizaka, Martin B. Plenio
We consider the transformation of multi-partite states in the single copy setting under positive-partial-transpose-preserving operations (PPT-operations) and obtain both qualitativ…
The species-area relationship and evolution
Daniel Lawson, Henrik Jeldtoft Jensen
Models relating to the Species-Area curve are usually defined at the species level, and concerned only with ecological timescales. We examine an individual-based model of co-evolut…
Topological conformal field theories and Calabi-Yau categories
Kevin J. Costello
This is the first of two papers which construct a purely algebraic counterpart to the theory of Gromov-Witten invariants (at all genera). These Gromov-Witten type invariants depend…