Publications (13)
Multi-mode storage and retrieval of microwave fields in a spin ensemble
C. Grezes, B. Julsgaard, Y. Kubo +13
A quantum memory at microwave frequencies, able to store the state of multiple superconducting qubits for long times, is a key element for quantum information processing. Electroni…
Multimode entanglement of light and atomic ensembles via off-resonant coherent forward scattering
D. V. Kupriyanov, O. S. Mishina, I. M. Sokolov +2
Quantum theoretical treatment of coherent forward scattering of light in a polarized atomic ensemble with an arbitrary angular momentum is developed. We consider coherent forward s…
Mapping a quantum state of light onto a long-lived atomic spin state: towards quantum memory
C. Schori, B. Julsgaard, J. L. Soerensen +1
We report an experiment on mapping a quantum state of light onto the ground state spin of an ensemble of Cs atoms with the life time of 2 milliseconds. Quantum memory for one of th…
Characterizing the spin state of an atomic ensemble using the magneto-optical resonance method
B. Julsgaard, J. Sherson, J. L. Sorensen +1
Quantum information protocols utilizing atomic ensembles require preparation of a coherent spin state (CSS) of the ensemble as an important starting point. We investigate the magne…
Experimental realization of highly-efficient broadband coupling of single quantum dots to a photonic crystal waveguide
T. Lund-Hansen, S. Stobbe, B. Julsgaard +5
We present time-resolved spontaneous emission measurements of single quantum dots embedded in photonic crystal waveguides. Quantum dots that couple to the photonic crystal waveguid…
Laser stabilization using spectral hole burning
L. Rippe, B. Julsgaard, A. Walther +1
We have frequency stabilized a Coherent CR699-21 dye laser to a transient spectral hole on the 606 nm transition in Pr^{+3}:Y_2SiO_5. A frequency stability of 1 kHz has been obtain…