The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The amplification of light by a single excited molecule in free space is demonstrated in this paper. The extinction effect is the result of a destructive interference between the incident laser beam and the coherently scattered light from the molecule in the ground state. Thus, inversion of the population should lead to a phase shift of the scattered light and amplification of the laser light.
We demonstrate robust and efficient routing of single photons using a microtoroidal cavity QED system. Single photons from a coherent input are sorted to one output of the fiber with excess photons redirected to the other.
We teleport quantum information between two distant ytterbium ions trapped in different vacuum chambers separated by one meter. Full state tomography shows that the heralded probabilistic process employed has a fidelity of 90%.
We theoretically investigate light localization and local density of states manipulation in aperiodic photonic structures and discuss their applications as pseudo-random lasers and label-free optical biosensors.
We present recent experimental progress in non-Gaussian control of optical continuous variables of traveling light, including generation and control of mesoscopic quantum superposition states and non-Gaussian entanglement control of continuous variables.
We present experimental techniques for using individual neutral atoms as qubits : trapping and moving single atoms, encoding qubits on hyperfine states, and entangling them. Special emphasis is given to recent techniques using Rydberg blockade.
Silicon photonics technologies are potentially useful in quantum information and communication experiments. This talk describes the first entangled photon-pair generation experiment to use a silicon wire waveguide, and discusses the application of silicon-based entanglement sources in quantum communication systems.
We present a method for graphically visualizing any two-qubit quantum state. This tool, based on the Poincare sphere, provides an unambiguous, intuitive, and useful compliment to photonic state tomography.
A comprehensive theory of couplings between a cavity and different charge configurations in a quantum dot is developed. It is shown that the quantum anti-Zeno effect is essential for the results obtained by QED experiments. The quantum dynamics of the system employing the quantum master equation is analysed. A Stansky-Krastanov InAs QD grown on a GaAs substrate was assumed, and the only first confined...
Doubly dressed states in a ladder-type two-photon, three-level coupling system are observed in our system. The quantum nature of the EIT system significantly suppresses Doppler broadening. The experiments were performed on a room-temperature atomic cesium cell .The cesium atoms are excited by two linearly polarized fields with parallel polarization. The spacing of the EIT doublet is strongly consistent...
We study theoretically and experimentally the strongly-coupled, nonlinear regime of a hot vapor of three-level atoms in an optical cavity. Interesting effects include lasing without inversion and polariton peak splittings.
A blazed grating is used for the separation of single photons from photon pairs. The Fraunhofer far field of the two-photon rate depends on the spatial correlation strength of the photons and enables correlation characterizations.
The appearance of the two-photon strong-coupling states is analyzed in atomic vs. semi-conductor quantum-dot microcavities. An identical excitation mechanism explains phenomena observed in photon-correlation measurements.
The conditional dynamics of 85Rb atoms in a driven two-mode optical cavity shows quantum beats from ground state Larmor precession. We study the manipulation and control of their fringe visibility.
A composite cavity QED system, which couples nitrogen vacancy centers in a diamond nanopillar to whispering gallery modes in a silica microsphere and overcomes limitations of earlier diamond nanocrystal based systems, is demonstrated.
A new cavity-optomechanical system has been developed comprised of two doubly-clamped silicon nitride cantilevers with a 1D photonic crystal etched into them. We will discuss the optical properties of the system and potential applications to solid-state cavity QED with diamond color centers.
We have developed the technique of two-photon joint temporal density measurements for temporal state characterization, thus facilitating two-photon generation with high temporal entanglement or nearly factorizable outputs by controlling the ultrafast pump bandwidth.
We demonstrate quantum teleportation of a coherent state as cluster computation using a four-mode linear cluster state. This is the first example of realization of cluster computation in continuous-variable systems.
The second-order coherence properties of highly-incoherent cw sources (true blackbody and amplified spontaneous emission) are directly evidenced at femtosecond timescales by use of an interferometric autocorrelator based on a two-photon absorption in a GaAs phototube.
We will discuss the implementation of high fidelity entangling operations based on a global interaction of a single laser beam with a string of trapped ions.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.