@article{PhysRevFocus.16.11, title = {Two Quantum States for the Price of One}, author = {Lindley, David}, journal = {Phys. Rev. Focus}, volume = {16}, issue = {}, pages = {11}, numpages = {1}, year = {2005}, month = {Oct}, doi = {10.1103/PhysRevFocus.16.11}, url = {http://link.aps.org/doi/10.1103/PhysRevFocus.16.11}, publisher = {American Physical Society} }