Das Problem des Raumes in der griechischen Philosophie bis Aristoteles.

Also published as the author's Inaug.-Diss., Leipzig, 1893.

De Luscinia quae est apud veteres.

On reel 214 beginning frame no. 50.

Cook's Reisehandbuch über Norwegen, Schweden, und Dänemark. Mit karten, stadtplänen, und deutsch-norwegischem wörter-verzeichniss.

Includes advertising.

Die geschichtschreibung des Tacitus.

Imprint covered by label: Leipzig, G. Fock.

De Juvenalis satirae septimae temporibus disputatio.

Authority for author's name: Fock. Catalogus dissertationum.

Ueber die verfasser einiger neuangelsächsisicher schriften.

Mode of access: Internet.

Schriftsteller und buchhändler im alten Rom.

First appeared as Inaug.-dis.--Zurich, 1884.

Die Faustsage und der Göethe'sche Faust,

Mode of access: Internet.

Die Sprachlaute : im allgemeinen, und die Laute des englischen, französischen und deutschen im besondern /

Mode of access: Internet.

Die politische wirksamkeit der griechischen frau; eine nachwirkung vorgriechischen mutterrechtes

Mode of access: Internet.

St. Barbara, die schutzheilige der bergleute und der artillerie, und ihre darstellung in der kunst ...

Bibliographical foot-notes.

Behaviour of the energy gap in a model of Josephson coupled Bose-Einstein condensates

In this work we investigate the energy gap between the ground state and the first excited state in a model of two single-mode Bose-Einstein condensates coupled via Josephson tunnelling. The ene:rgy gap is never zero when the tunnelling interaction is non-zero. The gap exhibits no local minimum below a threshold coupling which separates a delocalized phase from a self-trapping phase that occurs in the absence of the external potential. Above this threshold point one minimum occurs close to the Josephson regime, and a set of minima and maxima appear in the Fock regime. Expressions for the position of these minima and maxima are obtained. The connection between these minima and maxima and the dynamics for the expectation value of the relative number of particles is analysed in detail. We find that the dynamics of the system changes as the coupling crosses these points.

Conditional quantum-state engineering using ancillary squeezed-vacuum states

We investigate an optical scheme to conditionally engineer quantum states using a beam splitter, homodyne detection, and a squeezed vacuum as an ancillar state. This scheme is efficient in producing non-Gaussian quantum states such as squeezed single photons and superpositions of coherent states (SCSs). We show that a SCS with well defined parity and high fidelity can be generated from a Fock state of n

Quantum-state engineering with continuous-variable postselection

We present a scheme to conditionally engineer an optical quantum system via continuous-variable measurements. This scheme yields high-fidelity squeezed single photons and a superposition of coherent states, from input single- and two-photon Fock states, respectively. The input Fock state is interacted with an ancilla squeezed vacuum state using a beam splitter. We transform the quantum system by postselecting on the continuous-observable measurement outcome of the ancilla state. We experimentally demonstrate the principles of this scheme using coherent states and experimentally measure fidelities that are only achievable using quantum resources.

A Bethe ansatz solvable model for superpositions of Cooper pairs and condensed molecular bosons

We introduce a general Hamiltonian describing coherent superpositions of Cooper pairs and condensed molecular bosons. For particular choices of the coupling parameters, the model is integrable. One integrable manifold, as well as the Bethe ansatz solution, was found by Dukelsky et al. [J. Dukelsky, G.G. Dussel, C. Esebbag, S. Pittel, Phys. Rev. Lett. 93 (2004) 050403]. Here we show that there is a second integrable manifold, established using the boundary quantum inverse scattering method. In this manner we obtain the exact solution by means of the algebraic Bethe ansatz. In the case where the Cooper pair energies are degenerate we examine the relationship between the spectrum of these integrable Hamiltonians and the quasi-exactly solvable spectrum of particular Schrodinger operators. For the solution we derive here the potential of the Schrodinger operator is given in terms of hyperbolic functions. For the solution derived by Dukelsky et al., loc. cit. the potential is sextic and the wavefunctions obey PT-symmetric boundary conditions. This latter case provides a novel example of an integrable Hermitian Hamiltonian acting on a Fock space whose states map into a Hilbert space of PE-symmetric wavefunctions defined on a contour in the complex plane. (c) 2006 Elsevier B.V. All rights reserved.