Publications (30)
Measuring absolute frequencies beyond the GPS limit via long-haul optical frequency dissemination
C. Clivati, G. Cappellini, L. Livi +12
Global Positioning System (GPS) dissemination of frequency standards is ubiquitous at present, providing the most widespread time and frequency reference for the majority of indust…
Unstable regimes for a Bose-Einstein condensate in an optical lattice
L. De Sarlo, L. Fallani, J. E. Lye +4
We report on the experimental characterization of energetic and dynamical instability, two mechanisms responsible for the breakdown of Bloch waves in a Bose-Einstein condensate int…
Noise correlation spectroscopy of the broken order of a Mott insulating phase
V. Guarrera, N. Fabbri, L. Fallani +3
We use a two-color lattice to break the homogeneous site occupation of an atomic Mott Insulator of bosonic 87Rb. We detect the disruption of the ordered Mott domains via noise corr…
Observation of dynamical instability for a Bose-Einstein condensate in a moving 1D optical lattice
L. Fallani, L. De Sarlo, J. E. Lye +4
We have experimentally studied the unstable dynamics of a harmonically trapped Bose-Einstein condensate loaded into a 1D moving optical lattice. The lifetime of the condensate in s…
Spatial entanglement of bosons in optical lattices
M. Cramer, A. Bernard, N. Fabbri +6
Entanglement is a fundamental resource for quantum information processing, occurring naturally in many-body systems at low temperatures. The presence of entanglement and, in partic…
Coherent Manipulation of Orbital Feshbach Molecules of Two-Electron Atoms
G. Cappellini, L. F. Livi, L. Franchi +5
Ultracold molecules have experienced increasing attention in recent years. Compared to ultracold atoms, they possess several unique properties that make them perfect candidates for…
Majorana Quasi-Particles Protected by Angular Momentum Conservation
F. Iemini, L. Mazza, L. Fallani +3
We show how angular momentum conservation can stabilise a symmetry-protected quasi-topological phase of matter supporting Majorana quasi-particles as edge modes in one-dimensional…
Simulating Lattice Gauge Theories within Quantum Technologies
M. C. Bañuls, R. Blatt, J. Catani +17
Lattice gauge theories, which originated from particle physics in the context of Quantum Chromodynamics (QCD), provide an important intellectual stimulus to further develop quantum…
A strongly interacting gas of two-electron fermions at an orbital Feshbach resonance
G. Pagano, M. Mancini, G. Cappellini +5
We report on the experimental observation of a strongly interacting gas of ultracold two-electron fermions with orbital degree of freedom and magnetically tunable interactions. Thi…
State-dependent interactions in ultracold Yb probed by optical clock spectroscopy
L. Franchi, L. F. Livi, G. Cappellini +4
We report on the measurement of the scattering properties of ultracold Yb bosons in a three-dimensional (3D) optical lattice. Site occupancy in an atomic Mott insulator is…
A Bose-Einstein condensate in a random potential
J. E. Lye, L. Fallani, M. Modugno +3
An optical speckle potential is used to investigate the static and dynamic properties of a Bose-Einstein condensate in the presence of disorder. For strong disorder the condensate…
Multi-band spectroscopy of inhomogeneous Mott-insulator states of ultracold bosons
D. Clement, N. Fabbri, L. Fallani +2
In this work, we use inelastic scattering of light to study the response of inhomogeneous Mott-insulator gases to external excitations. The experimental setup and procedure to prob…
Synthetic dimensions and spin-orbit coupling with an optical clock transition
L. F. Livi, G. Cappellini, M. Diem +8
We demonstrate a novel way of synthesizing spin-orbit interactions in ultracold quantum gases, based on a single-photon optical clock transition coupling two long-lived electronic…
Anderson localization of a non-interacting Bose-Einstein condensate
G. Roati, C. D'Errico, L. Fallani +6
One of the most intriguing phenomena in physics is the localization of waves in disordered media. This phenomenon was originally predicted by Anderson, fifty years ago, in the cont…
Exploring correlated 1D Bose gases from the superfluid to the Mott-insulator state by inelastic light scattering
D. Clément, N. Fabbri, L. Fallani +2
We report the Bragg spectroscopy of interacting one-dimensional Bose gases loaded in optical lattices across the superfluid to Mott-insulator phase transition. Elementary excitatio…
Collective excitations of a trapped Bose-Einstein condensate in the presence of a 1D optical lattice
C. Fort, F. S. Cataliotti, L. Fallani +3
We study low-lying collective modes of a horizontally elongated 87Rb condensate produced in a 3D magnetic harmonic trap with the addition of a 1D periodic potential which is provid…
Excitations of Bose-Einstein condensates in a one-dimensional periodic potential
N. Fabbri, D. Clément, L. Fallani +4
We report on the experimental investigation of the response of a three-dimensional Bose-Einstein condensate (BEC) in the presence of a one-dimensional (1D) optical lattice. By mean…
Superfluid current disruption in a chain of weakly coupled Bose-Einstein Condensates
F. S. Cataliotti, L. Fallani, F. Ferlaino +3
We report the experimental observation of the disruption of the superfluid atomic current flowing through an array of weakly linked Bose-Einstein condensates. The condensates are t…
Fast closed-loop optimal control of ultracold atoms in an optical lattice
S. Rosi, A. Bernard, N. Fabbri +5
We present experimental evidence of the successful closed-loop optimization of the dynamics of cold atoms in an optical lattice. We optimize the loading of an ultracold atomic gas…
Observation of Universal Hall Response in Strongly Interacting Fermions
T. -W. Zhou, G. Cappellini, D. Tusi +9
The Hall effect, which originates from the motion of charged particles in magnetic fields, has deep consequences for the description of materials, extending far beyond condensed ma…
Optically-induced lensing effect on a Bose-Einstein condensate expanding in a moving lattice
L. Fallani, F. S. Cataliotti, J. Catani +4
We report the experimental observation of a lensing effect on a Bose-Einstein condensate expanding in a moving 1D optical lattice. The effect of the periodic potential can be descr…
A Novel Mechanism for Superfluidity Breakdown in Weakly Coupled Bose-Einstein Condensates
F. S. Cataliotti, L. Fallani, F. Ferlaino +7
This paper has been withdrawn by the authors. The authors have now written two separate papers, one theoretical (A. Smerzi, A. Trombettoni, P. G. Kevrekidis, and A. R. Bishop Phys.…
Measuring Hall voltage and Hall resistance in an atom-based quantum simulator
T. -W. Zhou, T. Beller, G. Masini +7
In the Hall effect, a voltage drop develops perpendicularly to the current flow in the presence of a magnetic field, leading to a transverse Hall resistance. Recent developments wi…
Effect of optical disorder and single defects on the expansion of a Bose-Einstein condensate in a one-dimensional waveguide
C. Fort, L. Fallani, V. Guarrera +4
We investigate the one-dimensional expansion of a Bose-Einstein condensate in an optical guide in the presence of a random potential created with optical speckles. With the speckle…
Towards a Bose-Glass of ultracold atoms in a disordered crystal of light
L. Fallani, J. E. Lye, V. Guarrera +2
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 repulsi…
Geometrically protected triple-point crossings in an optical lattice
I. C. Fulga, L. Fallani, M. Burrello
We show how to realize topologically protected crossings of three energy bands, integer-spin analogs of Weyl fermions, in three-dimensional optical lattices. Our proposal only invo…
Observation of chiral edge states with neutral fermions in synthetic Hall ribbons
M. Mancini, G. Pagano, G. Cappellini +8
Chiral edge states are a hallmark of quantum Hall physics. In electronic systems, they appear as a macroscopic consequence of the cyclotron orbits induced by a magnetic field, whic…
Engineering entanglement Hamiltonians with strongly interacting cold atoms in optical traps
R. E. Barfknecht, T. Mendes-Santos, L. Fallani
We present a proposal for the realization of entanglement Hamiltonians in one-dimensional critical spin systems with strongly interacting cold atoms. Our approach is based on the n…
Effect of interactions on the localization of a Bose-Einstein condensate in a quasi-periodic lattice
J. E. Lye, L. Fallani, C. Fort +4
The transport properties of a Bose-Einstein condensate in a 1D incommensurate bichromatic lattice are investigated both theoretically and experimentally. We observe a blockage of t…
Superradiant light scattering from a moving Bose-Einstein condensate
R. Bonifacio, F. S. Cataliotti, M. Cola +4
We investigate the interaction of a moving BEC with a far detuned laser beam. Superradiant Rayleigh scattering arises from the spontaneous formation of a matter-wave grating due to…