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Coherent States of su(1,1): Correlations, Fluctuations, and the Pseudoharmonic Oscillator
John Schliemann
We extend recent results on expectation values of coherent oscillator states and SU(2) coherent states to the case of the discrete representations of su(1,1). Systematic semiclassi…
Coherent Quantum Dynamics: What Fluctuations Can Tell
John Schliemann
Coherent states provide a natural connection of quantum systems to their classical limit and are employed in various fields of physics. Here we derive general systematic expansions…
Entanglement in SU(2)-invariant quantum systems: The positive partial transpose criterion and others
John Schliemann
We study entanglement in mixed bipartite quantum states which are invariant under simultaneous SU(2) transformations in both subsystems. Previous results on the behavior of such st…
Entanglement in SU(2)-invariant quantum spin systems
John Schliemann
We analyze the entanglement of SU(2)-invariant density matrices of two spins , using the Peres-Horodecki criterion. Such density matrices arise from therma…
Quantum Correlations in Two-Fermion Systems
John Schliemann, J. Ignacio Cirac, Marek Kus +2
We characterize and classify quantum correlations in two-fermion systems having 2K single-particle states. For pure states we introduce the Slater decomposition and rank (in analog…