Related papers: Binary Correlation Measurements

Binary Correlation Measurements

URL: http://arxiv.org/abs/2007.10605v3
Date: Mon, 28 Jun 2021 00:13:41 GMT
Title: Binary Correlation Measurements
Authors: Toru Ohira
Abstract summary: We show that, even with limited information, we can still reach the known minimum of three measurements for entanglement detection. The mixed quantum case appears to require more detailed information, which we illustrate by studying the concrete example of the Werner density matrix.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We search a simplest and minimal way to determine whether a given quantum system is entangled or separable. For this end, we propose binary correlation measurements in which restricted knowledge of only zero or non-zero correlations is available. We consider the concrete investigation on a pure state for two particles, each particle having two basis states (the 2x2 system). We show that, even with this limited information from the binary correlation measurements, we can still reach the known minimum of three measurements for entanglement detection. We next consider the comparable problem applied to the mixed density matrix. The mixed quantum case appears to require more detailed information, which we illustrate by studying the concrete example of the Werner density matrix.

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