Chiara Fort - Academia.edu (original) (raw)

Papers by Chiara Fort

Experiments with rubidium Bose-Einstein condensates in a radio-frequency field: Interactions, collisions and interference

Recent Advances in Metrology and Fundamental Constants, 2001

Cooling and Trapping of Potassium

Technical Digest. 1998 EQEC. European Quantum Electronics Conference (Cat. No.98TH8326), 1998

ABSTRACT

New generation of light sources for applications in spectroscopy

Lecture Notes in Physics, 1997

Anomalous doppler-free lineshapes in the saturation spectroscopy of cesium at 852 nm

Proceedings of 5th European Quantum Electronics Conference, 1994

Experiments with two Colliding Bose-Einstein Condensates in an Elongated Magneto-Static Trap

Trapped Particles and Fundamental Physics, 2002

Physical Review Letters, 2001

We investigate the properties of a coherent array containing about 200 Bose-Einstein condensates ... more We investigate the properties of a coherent array containing about 200 Bose-Einstein condensates produced in a far detuned 1D optical lattice. The density profile of the gas, imaged after releasing the trap, provides information about the coherence of the ground-state wavefunction. The measured atomic distribution is characterized by interference peaks. The time evolution of the peaks, their relative population as well as the radial size of the expanding cloud are in good agreement with the predictions of theory. The 2D nature of the trapped condensates and the conditions required to observe the effects of coherence are also discussed.

Laser cooling and Bose Einstein condensation of potassium isotopes

OPTICAL DOUBLE-RESONANCE SPECTROSCOPY OF CESIUM ATOMS IN A MAGNETO-OPTICAL TRAP

General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.-Observation of Dynamical Instability for a Bose-Einstein Condensate in a Moving 1D Optical Lattice

General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.-Effect of Optical Disorder and Single Defects on the Expansion of a Bose-Einstein Condensate in a One-Dimensional

Production Of Multiple 87Rb Condensates And Atom Lasers By Rf Coupling

Enhancement of the scissors mode of an expanding Bose-Einstein condensate

Interférométrie de Ramsey dans le domaine temporel avec des condensats de Bose Einstein

ABSTRACT

Anderson localization of a non-interacting condensate

Starting from one-dimensional Mott Insulators, we use a bichromatic optical lattice to add contro... more Starting from one-dimensional Mott Insulators, we use a bichromatic optical lattice to add controlled disorder to an ideal optical crystal where bosonic atoms are pinned by repulsive interactions. Increasing disorder, we observe a broadening of the Mott Insulator resonances and the transition to an insulating state with a flat density of excitations, suggesting the formation of a Bose-Glass.

Insulating phases of ultracold bosons in a disordered optical lattice: from a Mott Insulator to a Bose Glass

ABSTRACT

Onset of a Bose-Glass of ultracold atoms in a disordered crystal of light

Observing elementary excitations of correlated one-dimensional Bose gases

ABSTRACT The concept of elementary excitations lies at the core of our understanding of interacti... more ABSTRACT The concept of elementary excitations lies at the core of our understanding of interacting many-body systems. In one-dimensional (1D) quantum fluids, peculiar modes have been predicted to appear which do not have any higher-dimensional equivalent [1, 2]. As revealed recently in electronic systems and spin chains [3-5], these modes can dominate the physics outside of the low-energy regime, where the celebrated Luttinger liquid paradigm applies. No evidence of these modes has been reported so far for bosonic fluids. Here, we trace the excitations of 1D strongly-interacting Bose gases at low temperature through their effects on dynamical response functions. Our experimental results are compared to a theoretical analysis of the finite-temperature Lieb-Liniger model describing repulsively interacting bosons. The excellent agreement demonstrates that both quasi-particle and quasi-hole modes are contributing to the experimental correlation signals, a regime that lies beyond the conventional Luttinger Liquid theory.

Optical and Magnetic Trapping of Potassium 39

ABSTRACT

Doppler-free excitation of the weak 6S 1/2-8P 1/2 cesium transition at 389 nm

ABSTRACT

Experiments with rubidium Bose-Einstein condensates in a radio-frequency field: Interactions, collisions and interference

Recent Advances in Metrology and Fundamental Constants, 2001

Cooling and Trapping of Potassium

Technical Digest. 1998 EQEC. European Quantum Electronics Conference (Cat. No.98TH8326), 1998

ABSTRACT

New generation of light sources for applications in spectroscopy

Lecture Notes in Physics, 1997

Anomalous doppler-free lineshapes in the saturation spectroscopy of cesium at 852 nm

Proceedings of 5th European Quantum Electronics Conference, 1994

Experiments with two Colliding Bose-Einstein Condensates in an Elongated Magneto-Static Trap

Trapped Particles and Fundamental Physics, 2002

Physical Review Letters, 2001

We investigate the properties of a coherent array containing about 200 Bose-Einstein condensates ... more We investigate the properties of a coherent array containing about 200 Bose-Einstein condensates produced in a far detuned 1D optical lattice. The density profile of the gas, imaged after releasing the trap, provides information about the coherence of the ground-state wavefunction. The measured atomic distribution is characterized by interference peaks. The time evolution of the peaks, their relative population as well as the radial size of the expanding cloud are in good agreement with the predictions of theory. The 2D nature of the trapped condensates and the conditions required to observe the effects of coherence are also discussed.

Laser cooling and Bose Einstein condensation of potassium isotopes

OPTICAL DOUBLE-RESONANCE SPECTROSCOPY OF CESIUM ATOMS IN A MAGNETO-OPTICAL TRAP

General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.-Observation of Dynamical Instability for a Bose-Einstein Condensate in a Moving 1D Optical Lattice

General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.-Effect of Optical Disorder and Single Defects on the Expansion of a Bose-Einstein Condensate in a One-Dimensional

Production Of Multiple 87Rb Condensates And Atom Lasers By Rf Coupling

Enhancement of the scissors mode of an expanding Bose-Einstein condensate

Interférométrie de Ramsey dans le domaine temporel avec des condensats de Bose Einstein

ABSTRACT

Anderson localization of a non-interacting condensate

Starting from one-dimensional Mott Insulators, we use a bichromatic optical lattice to add contro... more Starting from one-dimensional Mott Insulators, we use a bichromatic optical lattice to add controlled disorder to an ideal optical crystal where bosonic atoms are pinned by repulsive interactions. Increasing disorder, we observe a broadening of the Mott Insulator resonances and the transition to an insulating state with a flat density of excitations, suggesting the formation of a Bose-Glass.

Insulating phases of ultracold bosons in a disordered optical lattice: from a Mott Insulator to a Bose Glass

ABSTRACT

Onset of a Bose-Glass of ultracold atoms in a disordered crystal of light

Observing elementary excitations of correlated one-dimensional Bose gases

ABSTRACT The concept of elementary excitations lies at the core of our understanding of interacti... more ABSTRACT The concept of elementary excitations lies at the core of our understanding of interacting many-body systems. In one-dimensional (1D) quantum fluids, peculiar modes have been predicted to appear which do not have any higher-dimensional equivalent [1, 2]. As revealed recently in electronic systems and spin chains [3-5], these modes can dominate the physics outside of the low-energy regime, where the celebrated Luttinger liquid paradigm applies. No evidence of these modes has been reported so far for bosonic fluids. Here, we trace the excitations of 1D strongly-interacting Bose gases at low temperature through their effects on dynamical response functions. Our experimental results are compared to a theoretical analysis of the finite-temperature Lieb-Liniger model describing repulsively interacting bosons. The excellent agreement demonstrates that both quasi-particle and quasi-hole modes are contributing to the experimental correlation signals, a regime that lies beyond the conventional Luttinger Liquid theory.

Optical and Magnetic Trapping of Potassium 39

ABSTRACT

Doppler-free excitation of the weak 6S 1/2-8P 1/2 cesium transition at 389 nm

ABSTRACT