A5076688368- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- IPv6, Mobility, Handover, Networks, Security
- Speech Recognition and Synthesis
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Internet Traffic Analysis and Secure E-voting
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
Weizmann Institute of Science
2017-2023
Obtaining insight into, and ultimately control over, electronic doping of halide perovskites may improve tuning their remarkable optoelectronic properties, reflected in what appear to be low defect densities as expressed various charge transport optical parameters. Doping is important for because it determines the electrical field within semiconducting photoabsorber, which strongly affects collection efficiency photogenerated charges. Here we report on intrinsic methylammonium lead...
Narrowband single photons that couple well to atomic ensembles could prove essential for future quantum networks, but the efficient generation of such remains an outstanding challenge. We realize a spatially-multiplexed heralded source are inherently compatible with commonly employed D2 line rubidium. Our is based on four-wave mixing in hot rubidium vapor, requiring no laser cooling or optical cavities, and generates high rate low noise. use Hong-Ou-Mandel interference verify...
Efficient synchronization of single photons that are compatible with narrow band atomic transitions is an outstanding challenge, which could prove essential for photonic quantum information processing. Here we report on the independently generated using a room-temperature memory. The photon source and memory interconnected by fibers employ same ladder-level scheme. We store retrieve heralded end-to-end efficiency η_{e2e}=25% final antibunching g_{h}^{(2)}=0.023. Our process results in over...
Abstract Coherent optical memories will likely play an important role in future quantum communication networks. Among the different platforms, based on ladder-type orbital transitions atomic gasses offer high bandwidth (>100 MHz), continuous (on-demand) readout, and low-noise operation. Here we report upgraded setup of our previously-reported fast ladder memory, with improved efficiency lifetime, reduced noise. The upgrade employs a stronger control field, wider signal beam, density,...
We introduce and demonstrate a scheme for eliminating the inhomogeneous dephasing of collective quantum state. The employs off-resonant fields that continuously dress state with an auxiliary sensor state, which has enhanced opposite sensitivity to same source inhomogeneity. derive optimal conditions under dressed is fully protected from when using either one or two dressing fields. latter provides better protection, circumvents qubit phase rotation, suppresses drive noise. further...
The resonant absorption of light by an ensemble absorbers decreases when the resonance is inhomogeneously broadened. Recovering lost cross section great importance for various applications light-matter interactions, particularly in quantum optics, but no recovery mechanism has yet been identified and successfully demonstrated. Here, we formulate limit set inhomogeneity on absorption, present a able to circumvent this fully recover homogeneous ensemble. We experimentally study using two...
Doppler broadening in thermal ensembles degrades the absorption cross-section and coherence time of collective excitations. In two photon transitions, it is common to assume that this problem becomes worse with larger wavelength mismatch. Here we identify an opposite mechanism, where such mismatch leads cancellation via counteracting effects velocity-dependent light-shifts shifts. We show effect general, both transparency resonances, favorably scales experimentally confirm enhancement...
Single-photon synchronization could prove essential for future quantum optical networks. We demonstrate of photon pairs with high rate and low noise using a room-temperature atomic memory compatible single-photon source.
We describe a fiber Raman amplifier for nanosecond and sub-nanosecond pulses centered around 1260 nm. The amplification takes place inside 4.5-m-long polarization-maintaining phosphorus-doped fiber, pumped at 1080 nm by 3-ns-long with repetition rate of 200 kHz up to 1.75 kW peak power. input seed are sub-mW peak-power minimal duration 0.25 ns, carved off continuous-wave laser sub-MHz linewidth. obtain linearly-polarized output peak-powers 1.4 kW, corresponding conversion efficiency over...
Coherent optical memories will likely play an important role in future quantum communication networks. Among the different platforms, based on ladder-type orbital transitions atomic gasses offer high bandwidth ($>100$ MHz), continuous (on-demand) readout, and low-noise operation. Here we report upgraded setup of our previously-reported fast ladder memory, with improved efficiency lifetime, reduced noise. The upgrade employs a stronger control field, wider signal beam, density, higher depth,...
Future optical quantum networks could benefit from single photons that couple well to atoms, for realizing, e.g., memories and deterministic photonic gates. However, the efficient generation of such remains a difficult challenge. Recently, we demonstrated bright multiplexed source indistinguishable with tunable GHz-bandwidth based on four-wave-mixing in rubidium vapor [Davidson et al. 2021 New J. Phys. 23 073050]. Here report an improved implementation this photon source. The new employs...
Efficient synchronization of single photons that are compatible with narrowband atomic transitions is an outstanding challenge, which could prove essential for photonic quantum information processing. Here we report on the independently-generated using a room-temperature memory. The photon source and memory interconnected by fibers employ same ladder-level scheme. We store retrieve heralded end-to-end efficiency $η_\text{e2e}=25\%$ final anti-bunching $g^{(2)}_\text{h}=0.023$. Our process...