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De Broglie Wavelength of a Nonlocal Four-Photon
Philip Walther, Jian-Wei Pan, Markus Aspelmeyer +3
Superposition is one of the most distinct features of quantum theory and has been demonstrated in numerous realizations of Young's classical double-slit interference experiment and…
Experimental nonlinear sign shift for linear optics quantum computation
Kaoru Sanaka, Thomas Jennewein, Jian-Wei Pan +2
We have realized the nonlinear sign shift (NS) operation for photonic qubits.This operation shifts the phase of two photons reflected by a beam splitter using an extra single photo…
An experimental observation of geometric phases for mixed states using NMR interferometry
Jiangfeng Du, Ping Zou, Mingjun Shi +6
Examples of geometric phases abound in many areas of physics. They offer both fundamental insights into many physical phenomena and lead to interesting practical implementations. O…
Reply to Ryff's Comment on "Experimental Nonlocality Proof of Quantum Teleportation and Entanglement Swapping"
Thomas Jennewein, Gregor Weihs, Jian-Wei Pan +1
Ryff's Comment raises the question of the meaning of the quantum state. We argue that the quantum state is just the representative of information available to a given observer. The…
Concentration of higher dimensional entanglement
Alipasha Vaziri, Jian-Wei Pan, Thomas Jennewein +2
Enhancement of entanglement enhancement is necessary for most quantum communication protocols many of which are defined in Hilbert spaces larger than two. In this work we present t…
Experimental Test of Quantum Nonlocality in Four-photon Greenberger-Horne-Zeilinger Entanglement
Zhi Zhao, Tao Yang, Yu-Ao Chen +3
We report the first experimental violation of local realism in four-photon Greenberger-Horne-Zeilinger (GHZ) entanglement. In the experiment, the non-statistical GHZ conflicts betw…
Experimental Realization of Entanglement Concentration and A Quantum Repeater
Zhi Zhao, Tao Yang, Yu-Ao Chen +2
We report an experimental realization of entanglement concentration using two polarization-entangled photon pairs produced by pulsed parametric down-conversion. In the meantime, ou…
Perfect Test of Entanglement for Two-level Systems
Sixia Yu, Jian-Wei Pan, Zeng-Bing Chen +1
A 3-setting Bell-type inequality enforced by the indeterminacy relation of complementary local observables is proposed as an experimental test of the 2-qubit entanglement. The prop…