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31 papers · 2 filters
Spin decoherence by spacetime curvature
Hiroaki Terashima, Masahito Ueda
A decoherence mechanism caused by spacetime curvature is discussed. The spin state of a particle is shown to decohere if only the particle moves in a curved spacetime. In particula…
Notes on the Fidelity of Symplectic Quantum Error-Correcting Codes
Mitsuru Hamada
Two observations are given on the fidelity of schemes for quantum information processing. In the first one, we show that the fidelity of a symplectic (stabilizer) code, if properly…
Distinguishability and indistinguishability by LOCC
Heng Fan
We show that a set of linearly independent quantum states , where are generalized Pauli matrices,…
Generation of highly non-classical n-photon polarization states by super-bunching at a photon bottleneck
Holger F. Hofmann
It is shown that coherent superpositions of two oppositely polarized n-photon states can be created by post-selecting the transmission of n independently generated photons into a s…
Experimental demonstration of quantum teleportation of a squeezed state
Nobuyuki Takei, Takao Aoki, Satoshi Koike +8
Quantum teleportation of a squeezed state is demonstrated experimentally. Due to some inevitable losses in experiments, a squeezed vacuum necessarily becomes a mixed state which is…
Highly efficient generation of pulsed photon pair using a bulk Periodically Poled Potassium Titanyl Phosphate
Bao-Sen Shi, Akihisa Tomita
In this paper, we demonstrate efficient generation of collinearly propagating, degenerate pulsed photon pairs based on a bulk Periodically Poled Potassium Titanyl Phosphate pumped…