A5075229041- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Orbital Angular Momentum in Optics
- Quantum optics and atomic interactions
- Radiation Detection and Scintillator Technologies
- Quantum Information and Cryptography
- Quantum, superfluid, helium dynamics
- Luminescence Properties of Advanced Materials
- Complementary and Alternative Medicine Studies
- Geophysics and Sensor Technology
- Dietary Effects on Health
- Carbon Dioxide Capture Technologies
- Advanced Nanomaterials in Catalysis
- Mechanical and Optical Resonators
- Graphene and Nanomaterials Applications
- Quantum many-body systems
- Spectroscopy and Laser Applications
- Adaptive optics and wavefront sensing
- Optical Wireless Communication Technologies
- Near-Field Optical Microscopy
- Mindfulness and Compassion Interventions
- Atmospheric Ozone and Climate
- Metal-Organic Frameworks: Synthesis and Applications
- Nanomaterials for catalytic reactions
Inter-University Accelerator Centre
2025
Ministry of AYUSH
2025
Los Alamos National Laboratory
2021-2024
Foundation for Research and Technology Hellas
2016-2021
University of Crete
2016-2021
University of Sussex
2019
Indian Institute of Technology Dhanbad
2013-2014
University of California, Berkeley
2011
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...
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,...
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....
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...
Removal of alizarin red S (ARS) and Indigo dye from aqueous media reduction nitro aromatic compounds are successfully done under mild condition by using reduced Graphene Oxide-Nickel Oxide (rGO-NiO) nanocomposite as catalyst. RGO-NiO is well characterized different analytical techniques. Morphology, structural, composition studies HRTEM, FESEM, EDX, TGA, FTIR, XPS, Raman spectroscopy, XRD. has high stability for the removal ARS, dye, reaction compounds.
We present magnetic detection of a single, 2 {\mu}m diameter cobalt microparticle using an atomic magnetometer based on microfabricated vapor cell. These results represent improvement by factor 105 in terms the detected moment over previous work magnetometers to detect microparticles. The improved sensitivity is due largely use small cells. In optimized setup, we predict limits 0.17 {\mu}m^3.
We present a simple precision-method to quickly and accurately measure the diameters of Gaussian beams, Airy spots, central peak Bessel beams ranging from sub-millimeter many centimeters without specialized equipment. Simply moving wire through beam recording relative losses using an optical power meter, one can easily with precision 1%. The accuracy this method has been experimentally verified for down limit commercial slit-based profiler (3%).
We study the hyperfine spectrum of atoms $^{87}\mathrm{Rb}$ dressed by a radio-frequency field and present experimental results in three different situations: freely falling atoms, trapped an optical dipole trap, adiabatic shell trap. In all cases, we observe several resonant sidebands spaced (in frequency) at intervals equal to dressing frequency, corresponding transitions enabled field. theoretically explain main features microwave using semiclassical model low-field limit rotating-wave...
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The Er <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> -Tm -Yb codoped ZrO 2 phosphor synthesized via chemical co-precipitation technique has been characterized by the X-ray diffraction (XRD) analysis. upconversion (UC) emission study of present material performed upon 980 nm diode laser excitation. efficient energy transfer between dopants found to be responsible in UC mechanism. tuning color light emitted from developed noticed...
Abstract Free space atom-interferometry traditionally suffers from the large distances that atoms have to fall in order achieve long interaction times. Trapped atom interferometry is emerging as a powerful way of achieving times reduced experimental volume. Here, we demonstrate bi-chromatic adiabatic magnetic shell traps novel tool for matterwave interferometry. We dress hyperfine states F = 1 and 2 Rubidium 87 Bose–Einstein Condensates thus creating two independently controllable which use...
We discuss a scheme to implement gyroscopic atom sensor with magnetically trapped ultra-cold atoms. Unlike standard light or matter wave Sagnac interferometers no free propagation is used. Interferometer operation controlled only static, radio-frequency and microwave magnetic fields, which removes the need for interferometric stability of optical laser beams. Due confinement atoms, may allow construction small scale portable sensors. main elements report on recent results efforts towards its...
We study the spectral signatures and coherence properties of radiofrequency dressed hyperfine Zeeman sub-levels 87Rb. Experimentally, we engineer combinations static RF magnetic fields to modify response atomic spin states environmental field noise. demonstrate analytically experimentally existence 'magic' dressing conditions where decoherence due electromagnetic noise is strongly suppressed. Building upon this result, propose a bi-chromatic configuration that reduces global sensitivity...
We present a slave laser highly suitable for the preparation and detection of 87Rb Bose-Einstein condensates (BEC). A anti-reflection coated diode serves as an optical amplifier, which requires neither active temperature stabilization nor dedicated equipment monitoring spectral purity amplified light. The power can be controlled with precision 10 μW in 70 mW relative fluctuations down to 2 × 10−4. Due its simplicity reliability, this will useful tool laboratory, mobile, or even space-based...
This approach permits much finer adjustments of the beam direction and position when compared to other steering techniques same mechanical precision. results in a increased precision, accuracy stability. A precision better than 5 {\mu}rad {\mu}m is demonstrated, resulting resolution coupling efficiency 0.1%. Together with added flexibility an additional element, this allows great simplification design fiber coupler, which normally most complex sensitive element on optical breadboard. We...