Quantum-dot-based quantum devices (Conference Presentation)

Lorenzo De Santis; Carlos A. Solanas; Niccolo Somaschi; Aristide Lemaitre; Isabelle Sagnes; Valerian Giesz; Loic Lanco; Pascale Senellart

doi:10.1117/12.2252749

2 June 2017 Quantum-dot-based quantum devices (Conference Presentation)

Lorenzo De Santis, Carlos A. Solanas, Niccolo Somaschi, Aristide Lemaitre, Isabelle Sagnes, Valerian Giesz, Loic Lanco, Pascale Senellart

Author Affiliations +

Proceedings Volume 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X; 101180U (2017) https://doi.org/10.1117/12.2252749
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Semiconductor quantum dots (QDs) are promising artificial atoms for quantum information processing: they can generate single photons flying quantum bits; they show single photon sensitivity promising to develop quantum gates and the spin of a carrier in a QD can be a quantum memory. The scalability of a quantum network requires efficient interfaces between stationary and flying quantum bits. In the last few years, our group has made important progresses in this direction using cavity quantum electrodynamics. With a deterministic positioning of a single QD in a microcavity, we control the QD spontaneous emission on demand [1]. With such technique highly efficient single photon sources with brightness as large as 80% are demonstrated [2]. By minimizing the charge noise around the QD in a gated structure [3], we demonstrate the generation of fully indistinguishable photon. The source brightness is shown to exceed by one or two orders of magnitude the one of a parametric down-conversion source of same quality [4]. Symmetrically, these devices perform as excellent interfaces between a flying quantum bit and a stationary one, where coherent control of a quantum bit can be done when only few photons [5]. References [1] A. Dousse, et al. , Phys. Rev. Lett. 101, 267404 (2008) [2] O. Gazzano, et al. , Nature Communications 4, 1425 (2013) [3] A. Nowak. et al., Nature Communications 5, 3240 (2014) [4] N. Somaschi, et al. Nature Photonics 10.1038/nphoton.2016.23 (2016). [5] V. Giesz, et al., Nature Communications doi:10.1038/ncomms11986 (2016)

Conference Presentation

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Lorenzo De Santis, Carlos A. Solanas, Niccolo Somaschi, Aristide Lemaitre, Isabelle Sagnes, Valerian Giesz, Loic Lanco, and Pascale Senellart "Quantum-dot-based quantum devices (Conference Presentation)", Proc. SPIE 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X, 101180U (2 June 2017); https://doi.org/10.1117/12.2252749

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KEYWORDS

Quantum communications

Single photon

Quantum dots

Chemical species

Quantum electrodynamics

Quantum information

Quantum information processing

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