Test for a large amount of entanglement , using few measurements

  title={Test for a large amount of entanglement , using few measurements},
  author={Rui Chao and Ben Reichardt and Chris Sutherland and Thomas Vidick},
Bell-inequality violations establish that two systems share some quantum entanglement. We give a simple test to certify that two systems share an asymptotically large amount of entanglement, n EPR states. The test is efficient: unlike earlier tests that play many games, in sequence or in parallel, our test requires only one or two CHSH games. One system is directed to play a CHSH game on a random specified qubit i, and the other is told to play games on qubits {i, j}, without knowing which… CONTINUE READING

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