Quantum phase transitions and collective enhancement of level density in odd–A and odd–odd nuclei

Quantum Shape-Phase Transitions in Finite Nuclei

Quantum phase transitions are structural changes occurring at zero temperature as a function of a coupling constant and driven by quantum fluctuations. An example is the phase transition between different shapes of nuclei for which the equilibrium deformation plays the role of an order parameter. A proper description of such phase transitions necessitates the inclusion of correlation effects be...

Quantum Phase Transitions and Collective Modes in d-wave Superconductors

Fluctuations near second-order quantum phase transitions in d-wave superconductors can cause strong damping of fermionic excitations, as observed in photoemission experiments. The damping of the gapless nodal quasiparticles can arise naturally in the quantum-critical region of a transition with an additional spin-singlet, zero momentum order parameter; we argue that the transition to a dx2−y2 +...

proficiency level and factors fostering reticence in efl learners

according to cheng (1999), in recent esl/efl literature, asian (especially east asian) learners of english as a foreign/second language have been arguably reported as reticent and passive learners. the most common allegations are that these students are reluctant to participate in classroom discourse; they are unwilling to give responses; they do not ask questions; and they are passive and over...

Phase Transitions and Collective Phenomena

Phonons and Phase Transitions in Finite Nuclei

The nature and evolution of collectivity and coherence in nuclei is one of the most fundamental issues in nuclear structure and its evolution with N and Z. Despite many experiments, the nature of nuclear vibrational modes in deformed nuclei and the nature of nuclear phase/shape transitions are not at all understood. We discuss new experiments on phonon and multi-phonon states in the rare earth ...