2018/04/30 by Daniel Huber, Marcus Reindl, Johannes Aberl +2 · 1 citation
Computer Science · Physics and Astronomy · #Field (mathematics) #Ideal (ethics) #Photon #Photon entanglement #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum decoherence #Quantum dot #Quantum entanglement #Quantum information #Quantum technology #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1088/2040-8986/aac4c4
published as J. Opt. 20 (2018) 073002 (17pp)
openalex created_date 2018/05/07 · openalex publication_date 2018/06/06 · arxiv created 2018/10/10 · arxiv updated 2018/10/11 · openalex updated_date 2026/08/05
More than 80 years have passed since the first publication on entangled quantum states. Over this period, the concept of spookily interacting quantum states became an emerging field of science. After various experiments proving the existence of such non-classical states, visionary ideas were put forward to exploit entanglement in quantum information science and technology. These novel concepts have not yet come out of the experimental stage, mostly because of the lack of suitable, deterministic sources of entangled quantum states. Among many systems under investigation, semiconductor quantum dots are particularly appealing emitters of on-demand, single polarization-entangled photon pairs. While it was originally believed that quantum dots must exhibit a limited degree of entanglement related to decoherence effects typical of the solid-state, recent studies have invalidated this preconception. We review the relevant experiments which have led to these important discoveries and discuss the remaining challenges for the anticipated quantum technologies.