Francesco Calcavecchia, Francesco Pederiva, and Thomas D. Kuehne Institute of Physical Chemistry, Johannes Gutenberg-University Mainz, Staudinger Weg 9, D-55128 Mainz, Germany Dipartimento di Fisica, University of Trento, via Sommerive 14, I-38050 Povo, Trento, Italy Lawrence Livermore National Laboratory Livermore, California 94550, USA Center for Computational Sciences, Johannes Gutenberg-University Mainz, Staudinger Weg 9, D-55128 Mainz, Germany … Continue reading On the Fermionic Shadow Wave Function and novel attempts to solve its sign problem