References of "Agarwal, G. S"
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See detailIndependent single photon emitters – a versatile source for the generation
von Zanthier, J.; Maser, A.; Wiegner, R. et al

Conference (2011)

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See detailGeneration of all symmetric as well as all total angular momentum eigenstates in photonic or matter qubits
von Zanthier, J.; Maser, A.; Wiegner, R. et al

Conference (2011)

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See detailSub-wavelength quantum imaging using uncorrelated single photon sources
von Zanthier, J.; Thiel, C.; Bastin, Thierry ULg et al

Poster (2011)

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See detailTunable entanglement, antibunching, and saturation effects in dipole blockade
Gillet, Jérémie ULg; Agarwal, G. S.; Bastin, Thierry ULg

in Physical Review. A (2010), 81

We report a model that makes it possible to analyze quantitatively the dipole blockade effect on the dynamical evolution of a two two-level atom system driven by an external laser field. The multiple ... [more ▼]

We report a model that makes it possible to analyze quantitatively the dipole blockade effect on the dynamical evolution of a two two-level atom system driven by an external laser field. The multiple excitations of the atomic sample are taken into account. We find very large concurrence in the dipole blockade regime. We further find that entanglement can be tuned by changing the intensity of the exciting laser. We also report a way to lift the dipole blockade paving the way to manipulate in a controllable way the blockade effects. We finally report how a continuous monitoring of the dipole blockade would be possible using photon-photon correlations of the scattered light in a regime where the spontaneous emission would dominate dissipation in the sample. [less ▲]

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See detailQuantum Entanglement Antibunching and Saturation of Atoms in Dipole Blockade
Gillet, Jérémie ULg; Agarwal, G. S.; Bastin, Thierry ULg

Conference (2009)

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See detailOperational Determination of Multiqubit Entanglement Classes via Tuning of Local Operations
Bastin, Thierry ULg; Thiel, C.; von Zanthier, J. et al

in Physical Review Letters (2009), 102

We present a physical setup with which it is possible to produce arbitrary symmetric long-lived multiqubit entangled states in the internal ground levels of photon emitters, including the paradigmatic ... [more ▼]

We present a physical setup with which it is possible to produce arbitrary symmetric long-lived multiqubit entangled states in the internal ground levels of photon emitters, including the paradigmatic Greenberger-Horne-Zeilinger and W states. In the case of three emitters, where each tripartite entangled state belongs to one of two well-defined entanglement classes, we prove a one-to-one correspondence between well-defined sets of experimental parameters, i.e., locally tunable polarizer orientations, and multiqubit entanglement classes inside the symmetric subspace. [less ▲]

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See detailQuantum Imaging with Incoherent Photons
Thiel, C.; Bastin, Thierry ULg; Martin, John ULg et al

in Physical Review Letters (2007), 99

We propose a technique to obtain subwavelength resolution in quantum imaging with potentially 100% contrast using incoherent light. Our method requires neither path-entangled number states nor multiphoton ... [more ▼]

We propose a technique to obtain subwavelength resolution in quantum imaging with potentially 100% contrast using incoherent light. Our method requires neither path-entangled number states nor multiphoton absorption. The scheme makes use of N photons spontaneously emitted by N atoms and registered by N detectors. It is shown that for coincident detection at particular detector positions a resolution of lambda/N can be achieved. [less ▲]

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See detailQuantum imaging with incoherent photons
von Zanthier, J.; Thiel, C.; Bastin, Thierry ULg et al

Conference (2007)

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See detailGeneration of Symmetric Dicke States of Remote Qubits with Linear Optics
Thiel, C.; von Zanthier, J.; Bastin, Thierry ULg et al

in Physical Review Letters (2007), 99

We propose a method for generating all symmetric Dicke states, either in the long-lived internal levels of N massive particles or in the polarization degrees of freedom of photonic qubits, using linear ... [more ▼]

We propose a method for generating all symmetric Dicke states, either in the long-lived internal levels of N massive particles or in the polarization degrees of freedom of photonic qubits, using linear optical tools only. By means of a suitable multiphoton detection technique, erasing Welcher-Weg information, our proposed scheme allows the generation and measurement of an important class of entangled multiqubit states. [less ▲]

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See detailMeasurement-induced spatial modulation of spontaneous decay and photon arrival times
von Zanthier, J.; Bastin, Thierry ULg; Agarwal, G. S.

in Physical Review. A (2006), 74

We report a way of manipulating the spontaneous emission process leading to a spatial modulation of spontaneous decay. The effect is observed in the case of coherently driven atoms separated by less than ... [more ▼]

We report a way of manipulating the spontaneous emission process leading to a spatial modulation of spontaneous decay. The effect is observed in the case of coherently driven atoms separated by less than a transition wavelength. It is quantified by Glauber's photon-photon second-order correlation function. We show that the photon arrival time, usually regarded as an entirely random process, depends not only on where a photon is detected but also on where a former photon had been recorded previously. Our results shed light on the unexpected consequences of state reduction and entanglement for the fundamental process of spontaneous emission. [less ▲]

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