A5054897194- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Quantum, superfluid, helium dynamics
- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Strong Light-Matter Interactions
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Spectroscopy and Laser Applications
- Solid State Laser Technologies
- Quantum optics and atomic interactions
- Orbital Angular Momentum in Optics
- Planetary Science and Exploration
- Astro and Planetary Science
- Geophysics and Sensor Technology
- Mechanical and Optical Resonators
- Pulsars and Gravitational Waves Research
- Advanced Thermodynamics and Statistical Mechanics
- Dark Matter and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Atomic and Molecular Physics
- Semiconductor Quantum Structures and Devices
- Quantum Electrodynamics and Casimir Effect
Foundation for Research and Technology Hellas
2014-2024
FORTH Institute of Electronic Structure and Laser
2005-2024
European Space Research and Technology Centre
2023
Centre for Quantum Technologies
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2022
Technology Innovation Institute
2022
National University of Singapore
2022
University of Sussex
2019
University of Basel
2006
Institute for Atomic and Molecular Physics
2002-2005
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
The theory of general relativity describes macroscopic phenomena driven by the influence gravity while quantum mechanics brilliantly accounts for microscopic effects.Despite their tremendous individual success, a complete unification fundamental interactions is missing and remains one most challenging important quests in modern theoretical physics.The STE-QUEST satellite mission, proposed as medium-size mission within Cosmic Vision program European Space Agency (ESA), aims testing with high...
Atomtronics deals with matter-wave circuits of ultracold atoms manipulated through magnetic or laser-generated guides different shapes and intensities. In this way, new types quantum networks can be constructed in which coherent fluids are controlled the know-how developed atomic molecular physics community. particular, devices enhanced precision, control, flexibility their operating conditions accessed. Concomitantly, simulators emulators harnessing on current flows also developed. Here,...
Atomtronics refers to the use of ultracold atoms for building circuits that rely on coherent propagation matter waves in waveguides. While still its infancy, this new quantum technology is promising both applications and probing correlated atomic itself. This Colloquium explains current state field discusses possible applications.
We demonstrate a novel class of trapping potentials, time-averaged adiabatic potentials (TAAP), which allows the generation large variety traps for quantum gases and matter-wave guides atom interferometers. Examples include stacks pancakes, rows cigars, multiple rings or sickles. The can be coupled through controllable tunneling barriers merged altogether. present analytical expressions pancake-, cigar-, ring-shaped traps. ring geometry is particular interest guided interferometry as it...
We predict that classes of coherent matter waves can self-accelerate without the presence an external potential. Such Bose-Einstein condensates follow arbitrary power-law trajectories and also take form diffraction-free Airy waves. show suitably engineered radially symmetric abruptly autofocus in space time. suggest different schemes for preparation condensate using laser beams to imprint amplitude or a phase pattern onto wave. Direct Fourier generation such is discussed continuous binary...
We present two novel matter-wave Sagnac interferometers based on ring- shaped time-averaged adiabatic potentials (TAAP). For both the atoms are put into a superposition of different spin states and manipulated independently using elliptically polarized rf-fields. In first interferometer accelerated by spin-state-dependent forces then travel around ring in guide. second one fully trapped during entire interferometric sequence moved "buckets". Corrections to ideal phase investigated for cases....
Recent developments in quantum technology have resulted a new generation of sensors for measuring inertial quantities, such as acceleration and rotation. These can exhibit unprecedented sensitivity accuracy when operated space, where the free-fall interrogation time be extended at will environment noise is minimal. European laboratories played leading role this field by developing concepts tools to operate these relevant environment, parabolic flights, towers, or sounding rockets. With...
The Laser Interferometer Space Antenna (LISA) mission, scheduled for launch in the mid-2030s, is a gravitational wave space observatory designed to detect sources emitting millihertz band. LISA an European Agency flagship currently entering Phase-B development phase. It expected help us improve our understanding of Universe by measuring different types, with some being at very high redshifts ([Formula: see text]). On February 23, 2022, we organized first Greece Workshop. This Workshop aimed...
We report the formation of Bose-Einstein condensates into nonequilibrium states. Our are much longer than equilibrium with same number atoms, show strong phase fluctuations, and have a dynamical evolution similar to that quadrupole shape oscillations regular condensates. The emerge in elongated traps as result local thermalization when nucleation time is short compared axial oscillation time. introduce condensate focusing new method extract phase-coherence length
We have tuned the whispering gallery modes of a fused silica micro-resonator over nearly 1 nm at 800 nm, i.e. half free spectral range or equivalent 106 linewidths resonator. This has been achieved by new method based on stretching two-stem microsphere. The devices described below will permit cavity-QED experiments with this ultra high finesse optical resonator when it is desirable to optimize its coupling emitters given transition frequencies. tuning capability demonstrated compatible both...
Abstract This article contains a summary of the White Paper submitted in 2019 to ESA Voyage 2050 process, which was subsequently published EPJ Quantum Technology (AEDGE Collaboration et al. Quant. Technol. 7 ,6 2020). We propose this concept for space experiment using cold atoms search ultra-light dark matter, and detect gravitational waves frequency range between most sensitive ranges LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. interdisciplinary experiment, called Atomic...
We have tuned the whispering gallery modes of a fused silica microresonator over nearly 1 nm at 800 nm, i.e. 0.5 FSR or 10^6 linewidths resonator. This has been achieved by new method based on stretching two-stem microsphere. The devices described below will permit Cavity-QED experiments with this high-Q optical resonator when it is desirable to optimize its coupling emitters given transition frequencies. tuning capability demonstrated here compatible both UHV and low temperature operation,...
We demonstrate an interference method to determine the low-energy elastic scattering amplitudes of a quantum gas. linearly accelerate two ultracold atomic clouds up energies 1.2 mK and observe collision halo by direct imaging in free space. From between $s$- $d$- partial waves differential pattern we extract corresponding phase shifts. The does not require knowledge density. This allows us infer accurate values for $d$-wave from zero-energy limit first Ramsauer minimum using only van der...
Gravitational Waves (GWs) were observed for the first time in 2015, one century after Einstein predicted their existence. There is now growing interest to extend detection bandwidth low frequency. The scientific potential of multi-frequency GW astronomy enormous as it would enable obtain a more complete picture cosmic events and mechanisms. This unique entirely new opportunity future astronomy, success which depends upon decisions being made on existing infrastructures. prospect combining...
Abstract We present the scientific motivation for future space tests of equivalence principle, and in particular universality free fall, at 10 − 17 level or better. Two possible mission scenarios, one based on quantum technologies, other electrostatic accelerometers, that could reach goal are briefly discussed. This publication is a White Paper written context Voyage 2050 ESA Call Papers.
In this Letter, we demonstrate magnetogravitational matter-wave lensing as a novel tool in atom-optics atomtronic waveguides. We collimate and focus matter waves originating from Bose-Einstein condensates ultracold thermal atoms ring-shaped time-averaged adiabatic potentials. “delta-kick cooling” of condensates, reducing their expansion energies by factor 46 down to 800 pK. The waveguide ring has diameter less than one millimeter, compared other state-of-the-art experiments requiring zero...
We propose the measurement of cavity-enhanced parity-nonconserving (PNC) optical rotation in several transitions metastable Xe and Hg, including (2P(3/2)(o))6s(2)[3/2](2)(o)→(2P(1/2)(o))6s(2)[1/2](1)(o) Hg 6s6p (3)P(2)(o)→6s6p (1)P(1)(o), with calculated amplitude ratios E(1)(PNC)/M1=11×10(-8) 10×10(-8), respectively. demonstrate use a high-finesse bow-tie cavity counterpropagating beams longitudinal magnetic field, which allows absolute chiral rotation, path length enhancement about 10(4),...
We present the theoretical basis of a cavity-enhanced polarimetric scheme for measurement parity-nonconserving (PNC) optical rotation. discuss possibility detecting PNC rotation in accessible transitions metastable Xe and Hg ground-state I. In particular, physics is presented we explore line-shape effects on expected signals. Furthermore, an analysis eigenpolarizations polarimeter, which necessary understanding procedure ability employing robust background subtraction procedures using two...
A green up-conversion laser is demonstrated in a 120 µm diameter microsphere of Er 3+-doped ZBLAN at room temperature. Lasing occurs around 540 nm with 801 diode pump. The lasing threshold only 30 µW absorbed power over two orders magnitude lower than the lowest previously observed IR-visible (Funk D S et al 1997 Electron. Lett. 33 1958-60).
A 1 W tapered amplifier requiring only 200 μW of injection power at 780 nm is presented in this paper. This achieved by injecting the seeding light into from its side and feeding amplified back small side. The spontaneous emission suppressed 75 dB. double-passed laser, here, extremely stable reliable. output beam remains well coupled to optical fiber for a timescale months, whereas seed did not require realignment over year daily operation.
The level of experimental control and the detailed theoretical understanding matter wave physics have led to a renaissance experiments testing very foundations quantum mechanics general relativity, as well applications in metrology. A variety interferometric sensors surpasses, or will surpass, limits their classical counterparts, for instance measurement frequency time forces such accelerations due rotation gravity with basic science, navigation search natural resources. collection original...