This technique has been used by other researchers to obtain an array of one-dimensional Bose gases in the Tonks-Girardeau regime. However, the fact that an array of gases is observed only allows the measurement of averaged quantities. Moreover, the temperatures and chemical potential between the different tubes are dispersed, which wash out many effects. For instance, this configuration does not allow probing of system fluctuations. Thus it proved interesting to produce a single Tonks–Girardeau gas. In 2011 one team created a single one-dimensional TG gas by trapping rubidium atoms magnetically in the vicinity of a microstructure. Thibaut Jacqmin et al. measured density fluctuations in that single strongly interacting gas. Those fluctuations proved to be sub-Poissonian, as expected for a Fermi gas.