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Implement Quantum Random Walks with Linear Optics Elements
Zhi Zhao, Jiangfeng Du, Hui Li +3
The quantum random walk has drawn special interests because its remarkable features to the classical counterpart could lead to new quantum algorithms. In this paper, we propose a f…
Classifying N-qubit Entanglement via Bell's Inequalities
Sixia Yu, Zeng-Bing Chen, Jian-Wei Pan +1
All the states of N qubits can be classified into N-1 entanglement classes from 2-entangled to N-entangled (fully entangled) states. Each class of entangled states is characterized…
Deterministic and Highly Efficient Quantum Cryptography with Entangled Photon Pairs
Zhi Zhao, Tao Yang, Zeng-Bing Chen +2
We present a protocol for deterministic and highly efficient quantum cryptography with entangled photon pairs in a 4x4-dimentional Hilbert space. Two communicating parties, Alice a…
All-Versus-Nothing Violation of Local Realism for Two Entangled Photons
Zeng-Bing Chen, Jian-Wei Pan, Yong-De Zhang +2
It is shown that the Greenberger-Horne-Zeilinger theorem can be generalized to the case with only two entangled particles. The reasoning makes use of two photons which are maximall…
Violation of Bell's inequality: criterion for quantum communication complexity advantage
Caslav Brukner, Marek Zukowski, Jian-Wei Pan +1
We prove that for every Bell's inequality and for a broad class of protocols, there always exists a multi-party communication complexity problem, for which the protocol assisted by…
Realization of All-or-nothing-type Kochen-Specker Experiment with Single Photons
Yun-Feng Huang, Chuan-Feng Li, Yong-Sheng Zhang +2
Using the spontaneous parametric down-conversion process in a type-I phase matching BBO crystal as single photon source, we perform an all-or-nothing-type Kochen-Specker experiment…
Correspondence between continuous variable and discrete quantum systems of arbitrary dimensions
Caslav Brukner, Myungshik S. Kim, Jian-Wei Pan +1
We establish a mapping between a continuous variable (CV) quantum system and a discrete quantum system of arbitrary dimension. This opens up the general possibility to perform any…
Calculation of entanglement for continious variable states
Huai-XIn Lu, Zeng-Bing Chen, Jian-Wei Pan +1
In this paper, we present a general formula for obtaining the reduced density opeator for any biparticle pure entangled state. Using this formula, we derive, in a compact form, the…
Experimental Nonlocality Proof of Quantum Teleportation and Entanglement Swapping
Thomas Jennewein, Gregor Weihs, Jian-Wei Pan +1
Quantum teleportation strikingly underlines the peculiar features of the quantum world. We present an experimental proof of its quantum nature, teleporting an entangled photon with…