Concept

Quantum vacuum state

Related publications (83)

Vacuum decay on a brane world

The bubble nucleation rate for a first order phase transition occurring on a brane world is calculated. Both the Coleman-de Luccia thin wall instanton and the Hawking-Moss instanton are considered. The results are compared with the corresponding nucleation ...

American Physical Society2005

Quantum helimagnetism of the frustrated spin-(1)/(2) chain LiCuVO4

Henrik Moodysson Rønnow, Mechthild Enderle

Inelastic neutron scattering, susceptibility, and high-field magnetization identify LiCuVO4 as a nearest-neighbour ferromagnetic, next-nearest-neighbour frustrated, quasi-one-dimensional helimagnet, which is largely influenced by quantum fluctuations. Comp ...

2005

The impact of molecular polarization on the electronic properties of molecular semiconductors

Libero Zuppiroli, Marie-Noëlle Bussac, Jean-David Picon

In a molecular semiconductor, the carrier is dressed with a polarization cloud that we treat as a quantum field of Frenkel excitons coupled to it. The consequences of the existence of this electronic polaron on the dynamics of an extra charge in a material ...

Eur. Phys. Soc. by EDP Sciences and Soc. Italiana Fisica2004

Nonadiabatic Dynamics of Excited Hg(3P1) in Ar Matrixes

Majed Chergui

The absorption and emission spectra of the 3P1-1S0 transition of a Hg atom embedded in solid Ar were simulated using the mol. dynamics with quantum transitions algorithm to consider the nonadiabatic transitions between the three adiabatic states. The simul ...

2003

Open string models with Scherk-Schwarz SUSY breaking and localized anomalies

Claudio Scrucca

We study examples of chiral four-dimensional IIB orientifolds with Scherk-Schwarz supersymmetry breaking, based on freely acting orbifolds. We construct a new Z(3) x Z(3)' model, containing only D9-branes, and rederive from a more geometric perspective the ...

2002

High-temperature ultrafast polariton parametric amplification in semiconductor microcavities

Benoît Marie Joseph Deveaud, Stefan Kundermann, Cristiano Ciuti, Michele Saba

Cavity polaritons, the elementary optical excitations of semiconductor microcavities, may be understood as a superposition of excitons and cavity photons(1). Owing to their composite nature, these bosonic particles have a distinct optical response, at the ...

2001

Long range orders in models of itinerant electrons interacting with heavy quantum fields

Nicolas Macris

The Falicov–Kimball model consists of itinerant lattice fermions interacting with Ising spins by an on-site potential of strength U. Kennedy and Lieb proved that at half filling there is a low temperature phase with chessboard long range order on Zd, d \ 2 ...

2001

Excitations of the field-induced quantum soliton lattice in CuGeO3

Henrik Moodysson Rønnow, Mechthild Enderle

The incommensurate magnetic soliton lattice in the high-field phase of a spin-Peierls system results from quantum fluctuations. We have used neutron scattering techniques to study CuGeO3, allowing us to obtain the first complete characterization of the exc ...

2001

Soft supersymmetry breaking in deformed moduli spaces, conformal theories and N=2 Yang-Mills theory

Riccardo Rattazzi

We give a self-contained discussion of recent progress in computing the non-perturbative effects of small non-holomorphic soft supersymmetry breaking, including a simple new derivation of these results based on an anomaly-free gauged U(1)(R) background. We ...

1999

Exact results for non-holomorphic masses in softly broken supersymmetric gauge theories

Riccardo Rattazzi

We consider strongly coupled supersymmetric gauge theories softly broken by the addition of gaugino masses m(lambda) and (non-holomorphic) scalar masses m(2), taken to be small relative to the dynamical scale Lambda. For theories with a weakly coupled dual ...

1999

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