A5102920563- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Quantum Mechanics and Applications
- Quantum Computing Algorithms and Architecture
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Neural Networks and Reservoir Computing
- Mechanical and Optical Resonators
- Random lasers and scattering media
- Spectroscopy and Quantum Chemical Studies
- Photonic and Optical Devices
- Quantum and electron transport phenomena
- Optical Network Technologies
- Laser-Matter Interactions and Applications
- Electrochemical Analysis and Applications
- Advanced Fluorescence Microscopy Techniques
- Semiconductor Quantum Structures and Devices
- Dark Matter and Cosmic Phenomena
- Scientific Computing and Data Management
- Orbital Angular Momentum in Optics
- Smart Grid Security and Resilience
- Molecular Communication and Nanonetworks
- Quantum Electrodynamics and Casimir Effect
- Distributed and Parallel Computing Systems
- Optical Coherence Tomography Applications
Stony Brook University
2015-2024
Brookhaven National Laboratory
2018-2024
University at Buffalo, State University of New York
2022
Mylan (South Africa)
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2022
Brookhaven College
2022
University of Manchester
2020
Czech Technical University in Prague
2020
Max Planck Institute of Quantum Optics
2009-2013
Max Planck Society
2009-2012
We produce a 600-ns pulse of 1.86-dB squeezed vacuum at 795 nm in an optical parametric amplifier and store it rubidium vapor cell for $1\text{ }\text{ }\ensuremath{\mu}\mathrm{s}$ using electromagnetically induced transparency. The recovered pulse, analyzed time-domain homodyne tomography, exhibits up to $0.21\ifmmode\pm\else\textpm\fi{}0.04\text{ }\mathrm{dB}$ squeezing. identify the factors leading degradation squeezing investigate phase evolution atomic coherence during storage interval.
The technologies of quantum information and control are rapidly improving, but full exploitation their capabilities requires complete characterization assessment processes that occur within devices. We present a method for characterizing, with arbitrarily high accuracy, any optical process. Our protocol recovers knowledge the process by studying, via homodyne tomography, its effect on set coherent states, is, classical fields produced common laser sources. demonstrate capability our...
We report characterization of electromagnetically induced transparency (EIT) resonances in the D1 line 87Rb under various experimental conditions. The dependence EIT linewidth on power pump field was investigated at temperatures for ground states lambda system associated with different hyperfine levels atomic 5S1/2 state as well magnetic sublevels same level. Strictly linear behavior observed all cases. A theoretical analysis our results shows that dephasing is main source decoherence,...
The effect of the detector electronic noise in an optical homodyne tomography experiment is shown to be equivalent loss if calibrated by measuring quadrature vacuum state. An explicit relation between level and efficiency obtained confirmed with a narrowband squeezed source operating at atomic rubidium wavelength.
We study the all-optical control of quantum fluctuations a light beam via combination single-atom cavity electrodynamics (CQED) and electromagnetically induced transparency (EIT). Specifically, EIT field is used to tune CQED transition frequencies in out resonance with probe light. In this way, photon blockade antiblockade effects are employed produce sub-Poissonian super-Poissonian fields, respectively. The achievable paves way towards realization prototype novel transistor which amplifies...
Abstract Scalable technologies to characterize the performance of quantum devices are crucial creating large networks and processing units. Chief among resources information is entanglement. Here we describe full temporal spatial characterization polarization-entangled photons produced by Spontaneous Parametric Down Conversions using an intensified high-speed optical camera, Tpx3Cam. This novel technique allows for precise determination Bell inequality parameters with minimal technical...
We report complete characterization of an optical memory based on electromagnetically induced transparency. recover the superoperator associated with memory, under two different working conditions, by means a quantum process tomography technique that involves storage coherent states and their upon retrieval. In this way, we can predict state retrieved from for any input, example, squeezed vacuum or Fock state. employ acquired to verify nonclassicality benchmark Gaussian distributed set states.
Implementing noise-free quantum devices at room temperature is the key to bring technology from laboratory public. So far this has been impossible, due inherent noise in thermal systems. The authors superpose spin waves by mapping photonic polarization qubits onto collective excitations of rubidium atoms. By manipulating resultant coherence, they obtain a room-temperature high-fidelity memory. Such could have great impact as repeaters, cornerstones elementary networks.
We experimentally demonstrate a communication protocol that enables frequency conversion and routing of quantum information in an adiabatic thus robust way. The is based on electromagnetically induced transparency (EIT) systems with multiple excited levels: transfer and/or distribution optical states between different signal modes implemented by adiabatically changing the control fields. proof-of-principle experiment performed using hyperfine levels rubidium D1 line.
An optical quantum memory is a stationary device that capable of storing and recreating photonic qubits with higher fidelity than any classical device. Thus far, these two requirements have been fulfilled for polarization in systems based on cold atoms cryogenically cooled crystals. Here, we report room-temperature arbitrary signal-to-background ratio 1 an average surpassing the benchmark weak laser pulses containing 1.6 photons average, without taking into account non-unitary operation. Our...
The development of useful photon-photon interactions can trigger numerous breakthroughs in quantum information science, however, this has remained a considerable challenge spanning several decades. Here, we demonstrate the first room-temperature implementation large phase shifts ($\ensuremath{\approx}\ensuremath{\pi}$) on single-photon level probe pulse ($1.5\text{ }\text{ }\ensuremath{\mu}\mathrm{s}$) triggered by simultaneously propagating few-photon-level signal field. This process is...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Eden Figueroa, Martin Mücke, Joerg Bochmann, Carolin Hahn, Karim Murr, Stephan Ritter, Celso J. Villas‐Boas, Gerhard Rempe; Electromagnetically Induced Transparency with Single Atoms in a Cavity. AIP Conf. Proc. 14 October 2011; 1363 (1): 389–392. https://doi.org/10.1063/1.3630217 Download citation file: Ris...
We describe the full temporal and spatial characterization of polarization-entangled photons produced by Spontaneous Parametric Down Conversions using an intensified high-speed optical camera, Tpx3Cam. This novel technique allows for precise determination Bell inequality parameters new methods distribution entangled quantum information. also discuss a to synchronize multiple cameras separated vast distances, which will be required distributed network.
We analyze the transmission of continuous-wave and pulsed squeezed vacuum through rubidium vapor under conditions electromagnetically induced transparency. Our analysis is based on a full theoretical treatment for state light propagating temporal spectral filters detected using time frequency-domain homodyne tomography. A model three-level atom allows us to evaluate linear losses extra noise that degrade nonclassical properties during atomic interaction eventually predict quantum states...
It has been recently suggested that optical interferometers may not require a phase-stable link between the stations if instead sources of quantum-mechanically entangled pairs could be provided to them, enabling extra- long baselines and benefiting numerous topics in astrophysics cosmology. We developed new variation this idea, proposing two photons from different interfered at decoupled stations, requiring only slow classical information them. show approach allow high- precision...
A key element to realize secure, long-distance quantum communication is a device capable of storing and synchronizing data without jeopardizing the security network. The size resources needed build memory has held this technology back---until now. authors send randomly polarized photons through free-space channel, receive them with portable memory, store them, finally read out. They show that encoded in remain fully protected throughout. This prototype network using cost-efficient,...
We simulate entanglement sharing between two end-nodes of a quantum network using SeQUeNCe, an open-source simulation package for networks. Our focus is on the rate generation with many repeaters finite memory lifetime. findings demonstrate that performance connection depends highly management protocol scheduling and swapping, resulting in final end-to-end entanglement. Numerical analytical simulations show limits given number involved, lifetimes distance end nodes, protocol.
We show the implementation of most fundamental quantum memory by mapping arbitrary polarization states light into and out a single atom trapped inside an optical cavity. The performance is analyzed through full process tomography. average fidelity measured to be 93% low decoherence rates result in storage times exceeding 180µs.