The Hong-Ou-Mandel effect is considered a signature of the quantumness of light, as the dip in coincidence probability using semiclassical theories has an upper bound of 50%. Here we show, theoretically and experimentally, that, with proper phase control of the signals, classical pulses can mimic a Hong-Ou-Mandel-like dip. We demonstrate a dip of $(99.635\ifmmode\pm\else\textpm\fi{}0.002)%$ with classical microwave fields. Quantumness manifests in wave-particle complementarity of the two-photon state. We construct quantum and classical interferometers for the complementarity test and show that while the two-photon state shows wave-particle complementarity the classical pulses do not.The Hong-Ou-Mandel effect is considered a signature of the quantumness of light, as the dip in coincidence probability using semiclassical theories has an upper bound of 50%. Here we show, theoretically and experimentally, that, with proper phase control of the signals, classical pulses can mimic a Hong-Ou-Mandel-like dip. We demonstrate a dip of $(99.635\ifmmode\pm\else\textpm\fi{}0.002)%$ with classical microwave fields. Quantumness manifests in wave-particle complementarity of the two-photon state. We construct quantum and classical interferometers for the complementarity test and show that while the two-photon state shows wave-particle complementarity the classical pulses do not.

arXiv:1810.01297Physical Review AJul 19, 201925 citations

An alternative to quantum complementarity

Ghenadie N. Mardari

Sep 28, 20042 citations

Quantification of complementarity in multiqubit systems

Xinhua Peng, Xiwen Zhu, Dieter Suter +3 more

Complementarity was originally introduced as a qualitative concept for the discussion of properties of quantum mechanical objects that are classically incompatible. More recently, complementarity has become a quantitative relation between classically incompatible properties, such as the visibility of interference fringes and ``which-way'' information, but also between purely quantum mechanical properties, such as measures of entanglement. We discuss different complementarity relations for systems of two-, three-, or $n$ qubits. Using nuclear magnetic resonance techniques, we have experimentally verified some of these complementarity relations in a two-qubit system.Complementarity was originally introduced as a qualitative concept for the discussion of properties of quantum mechanical objects that are classically incompatible. More recently, complementarity has become a quantitative relation between classically incompatible properties, such as the visibility of interference fringes and ``which-way'' information, but also between purely quantum mechanical properties, such as measures of entanglement. We discuss different complementarity relations for systems of two-, three-, or $n$ qubits. Using nuclear magnetic resonance techniques, we have experimentally verified some of these complementarity relations in a two-qubit system.

arXiv:quant-ph/0507183Physical Review ANov 16, 200556 citations

Complementarity in quantum systems

Dénes Petz

arXiv:quant-ph/0610189Reports on Mathematical PhysicsApr 1, 200733 citations

Quantum-Classical Complementarity and Relativistic Massless Free Fields

Partha Ghose

It is shown that relativistic wave equations for free, massless fields display quantum-classical complementarity.

arXiv:1801.10028Jan 27, 20180 citations

n

qubits. Using nuclear magnetic resonance techniques, we have experimentally verified some of these complementarity relations in a two-qubit system.