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The efficient and reliable storage of quantum states plays a crucial role for the realization of quantum computation and communication. For example, in linear optics quantum computation as represented by the KLM scheme [1], quantum storage enables one to store intermediate “results” or to boost scalability and reliability of the computation. To employ quantum storage for quantum computation, the storage...
Quantum teleportation is an important building block of quantum information processing. For practical applications, a quantum teleporter with the potential to include quantum error correction should be realized.
We experimentally demonstrate high-purity single photons hopping coherently between coupled optical cavities. The system shows high performance also as a controllable single-photon source, which emits single photons with a negative Wigner function.
We demonstrate a controlled-phase gate for continuous variables using a cluster-state resource of four optical modes. Its nonclassicality is verified through the presence of entanglement at the outputs for product-state inputs of two coherent states.
We demonstrate an effective mode-filtering technique to obtain robust non-Gaussian states by removing their noisy low-frequency components. Mode-filtered states outperform conventional states in the robust implementation of quantum teleportation.
We experimentally demonstrate a conversion of a single-photon state into a superposition of two weak coherent states and its inverse, via squeezing operation based on offline-prepared squeezed states, measurement and feedforward.
We demonstrate unconditional one-way quantum computation experiments using a linear cluster state of four entangled optical modes. Our results provide a first demonstration of the fundamental components for one-way quantum computation with continuous variables.
We demonstrate “undoing” quantum non-demolition gates by quantum erasing. In one-way quantum computation, these operations remove unwanted nodes from cluster states. Experimentally one mode was removed from two-mode and four-mode cluster state, respectively.
We experimentally demonstrate a quantum nondemolition (QND) interaction, based upon offline-prepared, squeezed ancilla states and homodyne measurements with feedforward. The resulting QND gate is verified via the criteria for QND measurements of each conjugate quadrature.
AIMS: Pancreaticobiliary ductal maljunction(PBM) is associated with several pancreatobiliary diseases including pancreatitis and carcinoma. Relation between adenomyomatosis (ADM) of the gallbladder and malignancy is not clear because of lacking of the data. However patients with ADM but free from abdominal symptoms are usually followed as benign proliferative disease although it is hard to differentiate...
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