Journal ArticleDOI
Homogeneous optical anisotropy in an ensemble of InGaAs quantum dots induced by strong enhancement of the heavy-hole band Landé parameter q
A. V. Trifonov,A. V. Trifonov,I. A. Akimov,I. A. Akimov,Leonid Golub,E. L. Ivchenko,I. A. Yugova,A. N. Kosarev,A. N. Kosarev,Sven Scholz,C. Sgroi,Astrid Ludwig,Andreas D. Wieck,Dmitri R. Yakovlev,Dmitri R. Yakovlev,Manfred Bayer,Manfred Bayer +16 more
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TLDR
In this article, a mechanism of strong enhancement of the band Land\'e parameter due to in-plane confinement of holes and the valence-band warping was proposed, which results in uniform magnetic field induced optical anisotropy for the entire quantum dot ensemble.Abstract:
The authors report on a mechanism of strong enhancement of the band Land\'e parameter $q$ due to in-plane confinement of holes and the valence-band warping. This explains the surprisingly large in-plane hole $g$ factor in symmetric self-assembled (In,Ga)As/GaAs quantum dots with $D2d$ symmetry as revealed by coherent optical spectroscopy. The proposed mechanism results in uniform magnetic field induced optical anisotropy for the entire quantum dot ensemble, which is a prerequisite for the realization of spin quantum memories and spin-photon entanglement in the ensemble.read more
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Extending the time of coherent optical response in ensemble of singly-charged InGaAs quantum dots
A. Kosarev,A. V. Trifonov,I. A. Yugova,I. I. Yanibekov,S. V. Poltavtsev,A. N. Kamenskii,Sven Scholz,C. Sgroi,Annick Ludwig,Andreas D. Wieck,Dmitri R. Yakovlev,Manfred Bayer,I. A. Akimov +12 more
TL;DR: In this article , the authors studied three-pulse spin-dependent photon echoes subject to moderate transverse magnetic fields up to 1 T and demonstrated that the timescale of coherent optical response can be extended by at least an order of magnitude by the field.
Journal ArticleDOI
Manipulation of optical coherence of quantum-well excitons by transverse magnetic field
I. A. Solovev,I. I. Yanibekov,Ia. A. Babenko,B. V. Stroganov,S. A. Eliseev,V. A. Lovcjus,Yu. P. Efimov,S. V. Poltavtsev,Yu. V. Kapitonov,I. A. Yugova +9 more
TL;DR: In this paper , the authors studied experimentally spin-dependent photon echoes from excitons in an InGaAs/GaAs quantum well subject to a transverse magnetic field (Voigt geometry).
Journal ArticleDOI
Extending the time of coherent optical response in ensemble of singly-charged InGaAs quantum dots
A. Kosarev,A. V. Trifonov,I. A. Yugova,I. I. Yanibekov,S. V. Poltavtsev,Alexander N. Kamenskii,Sven Scholz,C. Sgroi,Arne Ludwig,Andreas D. Wieck,Dmitri R. Yakovlev,Manfred Bayer,I. A. Akimov +12 more
TL;DR: In this paper , the authors studied three-pulse spin-dependent photon echoes subject to moderate transverse magnetic fields up to 1 T and demonstrated that the timescale of coherent optical response can be extended by at least an order of magnitude by the field.
Journal ArticleDOI
Weak Localization in p-Type Heterostructures in the Presence of Parallel Magnetic Field
TL;DR: In this article , the theory of weak localization for two-dimensional holes in the presence of in-plane magnetic field was developed for weak localization in the case of spin-dependent phase changing the quantum interference.
References
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Quantum Theory of Cyclotron Resonance in Semiconductors: General Theory
TL;DR: In this paper, the most general form of the Hamiltonian of an electron or hole in a semiconductor such as Si or Ge, in the presence of an external homogeneous magnetic field, is given.
Journal ArticleDOI
Quantum teleportation between light and matter
Jacob F. Sherson,H. Krauter,Rasmus K. Olsson,Brian Julsgaard,Klemens Hammerer,Ignacio Cirac,Eugene S. Polzik +6 more
TL;DR: The teleportation of a quantum state between two single material particles (trapped ions) has now also been achieved and is demonstrated between objects of a different nature—light and matter, which respectively represent ‘flying’ and ‘stationary’ media.
Journal ArticleDOI
Quantum-dot spin-photon entanglement via frequency downconversion to telecom wavelength
Kristiaan De Greve,Kristiaan De Greve,Leo Yu,Peter L. McMahon,Jason S. Pelc,Chandra M. Natarajan,Chandra M. Natarajan,Na Young Kim,Eisuke Abe,Eisuke Abe,Sebastian Maier,Christian Schneider,Martin Kamp,Sven Höfling,Sven Höfling,Robert H. Hadfield,Alfred Forchel,Martin M. Fejer,Yoshihisa Yamamoto,Yoshihisa Yamamoto +19 more
TL;DR: The present technique advances the III–V semiconductor quantum-dot spin system as a promising platform for long-distance quantum communication by frequency downconversion of a spontaneously emitted photon from a singly charged quantum dot to a wavelength of 1,560 nanometres.
Journal ArticleDOI
Experimental demonstration of a BDCZ quantum repeater node.
Zhen-Sheng Yuan,Zhen-Sheng Yuan,Yu-Ao Chen,Yu-Ao Chen,Bo Zhao,Shuai Chen,Joerg Schmiedmayer,Jian-Wei Pan,Jian-Wei Pan +8 more
TL;DR: This work realizes entanglement swapping with storage and retrieval of light, a building block of the BDCZ quantum repeater, and establishes the essential element needed to realize quantum repeaters with stationary atomic qu bits as quantum memories and flying photonic qubits as quantum messengers.
Journal ArticleDOI
Observation of entanglement between a quantum dot spin and a single photon
TL;DR: The observation of quantum entanglement between a semiconductor quantum dot spin and the colour of a propagating optical photon constitutes a first step towards implementation of a quantum network with nodes consisting of semiconductor spin quantum bits.