Atomic Physics

Faculty of Engineering, LTH

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Slow Light

1. Using electric fields for pulse compression and group-velocity control
     Qian Li, Adam Kinos, Axel Thuresson, Lars Rippe, and Stefan Kröll
     Phys. Rev. A 95, 032104 (2017)

2. Slow-light-based optical frequency shifter
    Qian Li, Yupan Bao, Axel Thuresson, Adam N. Nilsson, Lars Rippe, and Stefan Kröll
    Phys. Rev. A 93, 043832 (2016)

3. Spectral Engineering of Slow Light, Cavity Line Narrowing, and Pulse Compression
     Mahmood Sabooni, Qian Li, Lars Rippe, R. Krishna Mohan, and Stefan Kröll
     Phys. Rev. Lett. 111, 183602 (2013)

Quantum Computing

1. A confocal optical microscope for detection of single impurities in a bulk crystal at cryogenic temperatures
   J Karlsson, L Rippe and S Kröll
   Rev Sci Instr 87, 033701 (2016)

High fidelity readout scheme for rare-earth solid state quantum computing
  A Walther, L Rippe, Yan Ying, J Karlsson, D Serrano, S Bengtsson and S Kröll
   Phys Rev A 92,022319 (2015)

3.Impact of ion-ion energy transfer on quantum computing schemes in rare-earth doped solids
  D Serrano, Y Yan, J Karlsson, L Rippe, A Walther, S Kröll, A Ferrier & P Goldner
   J of Luminescence, 151, 93-99 (2014)

4.Measurement of line-widths and permanent electric dipole moment change of the Ce 4f-5d transition in Y2SiO5 for        a qubit readout scheme in rare-earth ion based quantum computing
  Ying Yan, J Karlsson, L Rippe, A Walther, D Serrano, S Kröll, P Goldner, D Lindgren, M-E Pistol,    Lihe Zheng & Jun Xu
   Phys Rev B87, 184205 (2013)

5.Extracting high fidelity quantum computing hardware from random systems
  A Walther, B Julsgaard, L Rippe, Y Yan, S Kröll, R Fisher and S Glaser
  Proceedings of the Nobel symposium on qubits for future quantum computers, Göteborg,
   Phys. Scr. T137, 014009 (2009)

6.Experimental quantum state tomography of a solid state qubit
   L Rippe, B Julsgaard, A Walther, Yan Ying, S Kröll
   Phys Rev A 77, 022307 (2008) 

7.Scalable designs for quantum computing with rare-earth ion doped crystals
   J Wesenberg, K Mølmer, L Rippe and S Kröll
   Phys Rev A 75, 012304 (2007)

8.Experimental demonstration of efficient and selective population transfer and qubit distillation in a rare-earth-               metal-ion-doped crystal
   L. Rippe, M Nilsson, S Kröll, R Klieber and D Suter
   Phys. Rev. A 71, 062328 (2005) 

9.Holeburning techniques for isolation and study of individual hyperfine transitions in inhomogeneously broadened s      solids, demonstrated in Pr3+:Y2SiO5
   M Nilsson, L Rippe, S Kröll, R Klieber and D Suter
   Phys. Rev. B 70, 214116 (2004), errata Phys. Rev. B 71, 149902 (2005)

10.Quantum computing with an inhomogeneously broadened ensemble of ions: Suppression of errors from detuning     variations by specially adapted pulses and coherent population trapping
   I Roos and K Mølmer
   Phys Rev A 69, 022321 (2004)

11. Initial experiments concerning quantum information processing in rare-earth-ion doped crystals
    M Nilsson, L Rippe, N Ohlsson, T Christiansson and S Kröll, Proceedings of the Jubilee Nobel Symposium
   "Coherence and Condensation" in Göteborg, Dec. 2001
    Physica Scripta, T102, 178-185 (2002)  

12. Quantum computer hardware based on rare-earth-ion-doped inorganic crystals
   N Ohlsson, R. Krishna Mohan and S Kröll
   Opt. Commun. 201, 71-77 (2002)


Quantum Memories

1.Efficient quantum memory using a weakly absorbing sample
M Sabooni, Qian Li, S Kröll & L Rippe
Phys Rev Lett, 110, 133604 (2013)

Storage and recall of weak coherent optical pulses with an efficiency of 25%
M Sabooni, F Beaudoin, A Walther, N Lin, A Amari, M Huang and S Kröll
Phys Rev Lett. 105, 060501 (2010) Full Text (arXiv:0912.2525)

Demonstration of atomic frequency comb memory for light with spin-wave storage
M Afzelius, I Usmani, A Amari, B Lauritzen, A Walther, C Simon, N Sangouard, J Minár, H de Riedmatten, N Gisin & S            Kröll
Phys Rev Lett, 104, 040503 (2010) Full Text (arXiv:0908.2309) (Editor´s Choice in Science 327, 923 (2010))

Quantum memory for non-stationary light fields based on controlled reversible inhomogeneous broadening
B Kraus, W Tittel, N Gisin, M Nilsson, S Kröll, and J I Cirac
 Phys. Rev. A 73, 020302(R) (2006) Full Text (arXiv:quant-ph/0502184)

Solid state quantum memory using complete absorption and re-emission of photons by tailored and externally              controlled inhomogeneous absorption profiles
M. Nilsson and S. Kröll
Opt. Commun. 247, 393-403 (2005).

Experimental investigation of delayed self-interference of single photons
N Ohlsson, M Nilsson and S Kröll
Phys. Rev. A 68 063812 (2003) Full Text (arXiv:quant-ph/0301157)

Complete reconstruction of the quantum state of a single-photon wave packet absorbed by a Doppler-broadened          transition
S A Moiseev and S Kröll
Phys. Rev. Lett. 87, 173601 (2001) Full Text

Laser Development

1. Understanding laser stabilization using spectral hole burning
    B. Julsgaard, A. Walther, S. Kröll and L. Rippe, Opt. Express, 15, 11444-11465 (2007) Full Text (see also
   "Laser stabilization using spectral hole burning", L. Rippe, B. Julsgaard, A. Walther and S. Kröll).

2. Mode-hop free electro-optically tuned diode laser
    L. Levin, Opt. Lett. 27, 237-239 (2002) Full Text.

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