Fast hole tunneling times in germanium hut wires probed by single-shot reflectometry Vukusic, Lada ; https://orcid.org/0000-0003-2424-8636 Kukucka, Josip Watzinger, Hannes Katsaros, Georgios ; https://orcid.org/0000-0001-8342-202X ddc:539 Heavy holes confined in quantum dots are predicted to be promising candidates for the realization of spin qubits with long coherence times. Here we focus on such heavy-hole states confined in germanium hut wires. By tuning the growth density of the latter we can realize a T-like structure between two neighboring wires. Such a structure allows the realization of a charge sensor, which is electrostatically and tunnel coupled to a quantum dot, with charge-transfer signals as high as 0.3 e. By integrating the T-like structure into a radiofrequency reflectometry setup, single-shot measurements allowing the extraction of hole tunneling times are performed. The extracted tunneling times of less than 10 μs are attributed to the small effective mass of Ge heavy-hole states and pave the way toward projective spin readout measurements. American Chemical Society 2017 info:eu-repo/semantics/article doc-type:article text http://purl.org/coar/resource_type/c_2df8fbb1 https://research-explorer.ista.ac.at/record/840 https://research-explorer.ista.ac.at/download/840/4951 Vukušić L, Kukucka J, Watzinger H, Katsaros G. Fast hole tunneling times in germanium hut wires probed by single-shot reflectometry. <i>Nano Letters</i>. 2017;17(9):5706-5710. doi:<a href="https://doi.org/10.1021/acs.nanolett.7b02627">10.1021/acs.nanolett.7b02627</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.nanolett.7b02627 info:eu-repo/semantics/altIdentifier/issn/1530-6984 info:eu-repo/semantics/altIdentifier/wos/000411043500078 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess