Measuring Concurrence in Qubit Werner States Without an Aligned Reference Frame
Measuring Concurrence in Qubit Werner States Without an Aligned Reference Frame
Alice lives on Venus, Bob lives on Mars\dots{} The biggest problem in their communication is to establish a common reference frame, so that they can use quantum cryptography for their secret letters. To help them, this study proposes a method for entanglement quantification that does $n\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}t$ rely on synchronized reference …