Experimental quantum teleportation
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TLDR
In this article, the authors demonstrated the feasibility of quantum teleportation over arbitrary distances of the state of a quantum system by using a measurement such that the second photon of the entangled pair acquires the polarization of the initial photon.Abstract:
Quantum teleportation — the transmission and reconstruction over arbitrary distances of the state of a quantum system — is demonstrated experimentally. During teleportation, an initial photon which carries the polarization that is to be transferred and one of a pair of entangled photons are subjected to a measurement such that the second photon of the entangled pair acquires the polarization of the initial photon. This latter photon can be arbitrarily far away from the initial one. Quantum teleportation will be a critical ingredient for quantum computation networks.read more
Citations
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An entangled photon source for resonant single-photon-single-atom interaction
TL;DR: In this article, a tunable, frequency-stabilized, narrow-bandwidth source of entangled photon pairs, which can be tuned to the two D-P transitions in Ca+ ions at 850 and 854 nm, is presented.
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Spectral study of photon pairs generated in dispersion shifted fiber with a pulsed pump
TL;DR: Spectral correlation of photon pairs generated in dispersion shifted fiber by a pulsed pump is theoretically analyzed and experimentally investigated and the experimental results agree with the calculation.
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Tripartite Quantum Controlled Teleportation via Seven-Qubit Cluster State
Wei Li,Xin-Wei Zha,Jian-Xia Qi +2 more
TL;DR: In this paper, a theoretical scheme for tripartite quantum controlled teleportation is presented using the entanglement property of seven-qubit cluster state and the aspects of quantum resource consumption, operation complexity, classical resources consumption, quantum information bits transmitted, success probability and efficiency with other schemes are compared.
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High-fidelity source of four-photon entanglement
TL;DR: In this paper, a polarisation-entangled four-photon state can be generated directly by a second order parametric down-conversion process, and the authors use this emission to characterise the properties of a four-qubit state and to analyse its entanglement based on the violation of the four-particle Bell inequality.
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Demonstration of Entanglement Purification and Swapping Protocol to Design Quantum Repeater in IBM Quantum Computer
Bikash K. Behera,Swarnadeep Seth,Swarnadeep Seth,Antariksha Das,Antariksha Das,Prasanta K. Panigrahi +5 more
TL;DR: This work uses IBM’s real quantum processor ‘ibmqx4’ to create two pair of entangled qubits and design an equivalent quantum circuit which consequently swaps the entanglement between the two pairs, and develops a novel purification protocol which enhances the degree of entanglements in a noisy channel.
References
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Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels
Charles H. Bennett,Gilles Brassard,Claude Crépeau,Richard Jozsa,Asher Peres,William K. Wootters +5 more
TL;DR: An unknown quantum state \ensuremath{\Vert}\ensure Math{\varphi}〉 can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical Einstein-Podolsky-Rosen (EPR) correlations.
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A single quantum cannot be cloned
TL;DR: In this article, the linearity of quantum mechanics has been shown to prevent the replication of a photon of definite polarization in the presence of an excited atom, and the authors show that this conclusion holds for all quantum systems.
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Speakable and Unspeakable in Quatum Mechanics
J. S. Bell,N. David Mermin +1 more
TL;DR: Koestler's book The Sleepwalkers as discussed by the authors is an account of the Copernican revolution, with Copernicus, Kepler, and Galilei as heroes, and he concluded that they were not really aware of what they were doing.
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Die gegenwärtige Situation in der Quantenmechanik
TL;DR: In this paper, the authors discuss the effect of the Verschrgnkung on the performance of the experimentators in terms of the results of the experiments they conducted, and present an analysis of the verifiability of their results.