first thing will be to figure out how to declare a type meter^-0.5 maybe my previous try that didn't work with boost 1.42 will start to work with 1.48:
typedef derived_dimension<length_base_dimension,root<2> >::type quantum_wavefunction_1D;
I tried to send a working version of your code yesterday, but the message was bounced because the attachments were too big; I will resend when I get to the office. For now, your problem here is twofold: 1) derived_dimension is a convenience typedef for integer powers; you need to use make_dimension_list<> 2) once you have defined the dimension, you also need to typedef a unit in the SI system corresponding to your desired length^(-1/2) dimension: typedef unit<quantum_wavefunction_1D,si::system> quantum_wavefunction_1D_unit Matthias