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quant-ph2015★ 10 cited
How long does it take to obtain a physical density matrix?
Lukas Knips, Christian Schwemmer, Nico Klein +3
The statistical nature of measurements alone easily causes unphysical estimates in quantum state tomography. We show that multinomial or Poissonian noise results in eigenvalue dist…
quant-ph2014★ 36 cited
Multipartite entanglement detection with minimal effort
Lukas Knips, Christian Schwemmer, Nico Klein +2
Certifying entanglement of a multipartite state is generally considered as a demanding task. Since an qubit state is parametrized by real numbers, one might naively e…