Demonstration of atomic frequency comb memory for light with spin-wave storage (2009)
Afzelius, Mikael, Usmani, Imam, Amari, Atia, Lauritzen, Björn, Walther, Andreas, Simon, Christoph, ...
We present a light-storage experiment where the light is mapped onto an inhomogeneously broadened optical transition in a praseodymium-doped crystal, which is shaped into an atomic frequency comb....
Solid state quantum memory for photons at telecommunication wavelengths (2009)
Lauritzen, Björn, Minář, Jiří, De Riedmatten, Hugues, Afzelius, Mikael, Sangouard, Nicolas, Simon, Christoph, ...
We demonstrate experimentally a solid-state quantum memory for photons at telecommunication wavelengths. Weak light fields at the single photon level are stored for a time up to 600 ns in an...
Quantum repeaters based on atomic ensembles and linear optics (2009)
Sangouard, Nicolas, Simon, Christoph, De Riedmatten, Hugues, Gisin, Nicolas
The distribution of quantum states over long distances is limited by photon loss. Straightforward amplification as in classical telecommunications is not an option in quantum communication because of...
Ottaviani, Carlo, Simon, Christoph, De Riedmatten, Hugues, Afzelius, Mikael, Lauritzen, Bjoern, Sangouard, Nicolas, ...
The creation of single collective excitations in atomic ensembles via spontaneous Raman emission plays a key role in several quantum communication protocols, starting with the seminal DLCZ protocol...
Quantum Repeaters based on Single Trapped Ions (2009)
Sangouard, Nicolas, Dubessy, Romain, Simon, Christoph
We analyze the performance of a quantum repeater protocol based on single trapped ions. At each node, single trapped ions embedded into high finesse cavities emit single photons whose polarization is...
Quantum Repeaters based on Single Trapped Ions (2009)
Sangouard, Nicolas, Dubessy, Romain, Simon, Christoph
We analyze the performance of a quantum repeater protocol based on single trapped ions. At each node, single trapped ions embedded into high finesse cavities emit single photons whose polarization is...
Quantum Repeaters based on Single Trapped Ions (2009)
Sangouard, Nicolas, Dubessy, Romain, Simon, Christoph
We analyze the performance of a quantum repeater protocol based on single trapped ions. At each node, single trapped ions embedded into high finesse cavities emit single photons whose polarization is...
Quantum Repeaters based on Single Trapped Ions (2009)
Sangouard, Nicolas, Dubessy, Romain, Simon, Christoph
We analyze the performance of a quantum repeater protocol based on single trapped ions. At each node, single trapped ions embedded into high finesse cavities emit single photons whose polarization is...
Quantum Repeaters based on Single Trapped Ions (2009)
Sangouard, Nicolas, Dubessy, Romain, Simon, Christoph
We analyze the performance of a quantum repeater protocol based on single trapped ions. At each node, single trapped ions embedded into high finesse cavities emit single photons whose polarization is...
Purification of single-photon entanglement with linear optics (2008)
Sangouard, Nicolas, Simon, Christoph, Coudreau, Thomas, Gisin, Nicolas
We show that single-photon entangled states of the form |0>|1>+|1>|0> can be purified with a simple linear-optics based protocol, which is eminently feasible with current technology. Besides its...
Robust and Efficient Quantum Repeaters with Atomic Ensembles and Linear Optics (2008)
Sangouard, Nicolas, Simon, Christoph, Zhao, Bo, Chen, Yu-Ao, De Riedmatten, Hugues, Pan, Jian-Wei, ...
In the last few years there has been a lot of interest in quantum repeater protocols using only atomic ensembles and linear optics. Here we show that the local generation of high-fidelity entangled...
Long-Distance Entanglement Distribution with Single-Photon Sources (2007)
Sangouard, Nicolas, Simon, Christoph, Minar, Jiri, Zbinden, Hugo, De Riedmatten, Hugues, Gisin, Nicolas
We present an efficient architecture for quantum repeaters based on single-photon sources in combination with quantum memories for photons. Errors inherent to previous repeater protocols using...
Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories (2007)
Simon, Christoph, De Riedmatten, Hugues, Afzelius, Mikael, Sangouard, Nicolas, Zbinden, Hugo, Gisin, Nicolas
We propose a quantum repeater protocol which builds on the well-known DLCZ protocol [L.M. Duan, M.D. Lukin, J.I. Cirac, and P. Zoller, Nature 414, 413 (2001)], but which uses photon pair sources in...
Sangouard, Nicolas, Simon, Christoph, Afzelius, Mikael, Gisin, Nicolas
We present a detailed analysis of a quantum memory for photons based on controlled and reversible inhomogeneous broadening (CRIB). The explicit solution of the equations of motion is obtained in the...