TY - JOUR PB - American Physical Society ID - 10.1103/Physics.2.13 TI - Double or nothing for spin filters JF - Physics JA - Physics J1 - PHYSICS VL - 2 IS - SP - 13 EP - PY - 2009/02/17/ UR - http://link.aps.org/doi/10.1103/Physics.2.13 A1 - De Teresa, José María ER -