20.500.12556/RUL-164791 Mbit/s-range alkali vapour spin noise quantum random number generators Spin noise based quantum random number generators first appeared in 2008 and have since then garnered little further interest, in part because their bit rate is limited by the transverse relaxation time T$_2$ which for coated alkali vapour cells is typically in the kbit/s range. Here we present two advances. The first is an improved bit generation protocol that allows generating bits at rates exceeding 1/T$_2$ with only a minor increase of serial correlations. The second is a significant reduction of the time T$_2$ itself by removing the coating, increasing the vapour temperature and introducing a magnetic-field gradient. In this way we managed to increase the bit generation rate to 1.04 Mbit/s. We analyse the quality of the generated random bits using entropy estimation and we discuss the extraction methods to obtain high-entropy bitstreams. We accurately predict the entropy output of the device backed with a stochastic model and numerical simulations. quantum random number generator entropy extraction stochastic modelling spin noise spectroscopy stohastični procesi true false true Angleški jezik Slovenski jezik Članek v reviji 2024-11-12 11:32:36 2024-11-12 11:32:37 2024-11-22 14:56:09 0000-00-00 00:00:00 2024 0 0 16 str. Vol. 11, art. 11 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 51 2196-0763 10.1140/epjqt/s40507-024-00221-5 187579395 s40507-024-00221-5_(1).pdf s40507-024-00221-5_(1).pdf 1 9EE0768B559173164B90ED8FB4D3D824 41f6111be7cfef6d5dd77624bd55e0c1e61c394bc15e3f02817ebabb135c66af 7d6496f4-a0e1-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=195475 https://epjquantumtechnology.springeropen.com/articles/10.1140/epjqt/s40507-024-00221-5 1 1337e871-a0e1-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=195474 Fakulteta za matematiko in fiziko Fakulteta za elektrotehniko 0 0 0