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quant-ph2007★ 104 cited
Universal geometric entanglement close to quantum phase transitions
Roman Orus
Under successive Renormalization Group transformations applied to a quantum state of finite correlation length , there is typically a loss of entanglement after each ite…
quant-ph2005
Two Slightly-Entangled NP-Complete Problems
Roman Orus
We perform a mathematical analysis of the classical computational complexity of two genuine quantum-mechanical problems, which are inspired in the calculation of the expected magne…
quant-ph2002★ 2 cited
Natural majorization of the Quantum Fourier Transformation in phase-estimation algorithms
Roman Orus, Jose I. Latorre, Miguel A. Martin-Delgado
We prove that majorization relations hold step by step in the Quantum Fourier Transformation (QFT) for phase-estimation algorithms considered in the canonical decomposition. Our re…