Restoration of Entanglement by Spectral Filters
Koji Usami, Yoshihiro Nambu, Satoshi Ishizaka, Tohya Hiroshima, Yoshiyuki Tsuda, Ken Matsumoto, Kazuo Torii Nakamura · arXiv (Cornell University) · 2001
We experimentally demonstrate that entanglement of bi-photon polarization state can be restored by spectral filters. This restoration procedure can be viewed as a new class of quantum eraser, which retrieves entanglement rather than just interference by manipulating an ancillary degree of freedom.