Hyperentangled Bell-state analysis

By Tzu-Chieh Wei, J. Barreiro, Paul G. Kwiat. 2007

142 citations recorded by the source corpus.

It is known that it is impossible to unambiguously distinguish the four Bell states encoded in pairs of photon polarizations using only linear optics. However, hyperentanglement, the simultaneous entanglement in more than one degree of freedom, has been shown to assist the complete Bell analysis of the four Bell states (given a fixed state of the other degrees of freedom). Yet introducing other degrees of freedom also enlarges the total number of Bell-like states. We investigate the limits for unambiguously distinguishing these Bell-like states. In particular, when the additional degree of freedom is qubitlike, we find that the optimal one-shot discrimination schemes are to group the 16 states into seven distinguishable classes, and that an unambiguous discrimination is possible with two identical copies.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/fd4bfa4bd1dbb3a4e31ad85bc5f11f7c7c282be2

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In Artificial Intelligence

1. Tzu-Chieh Wei
2. Paul G. Kwiat
3. J. Barreiro

In Atomic and Molecular Physics, and Optics

1. Tzu-Chieh Wei
2. Paul G. Kwiat
3. J. Barreiro

Citations in the corpus

• Beating the channel capacity limit for linear photonic superdense coding (2008, methodology): “We have investigated the limits for unambiguously distinguishing these Belllike states, and have found that the optimal one-shot discrimination scheme is to group the 16 states into 7 distinguishable classes [25].”