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05-07
2008
A substate theorem in classical and quantum information theory with some applica
Abstract: Suppose P, Q are probability distributions on the same sample space. Their relative entropy is defined as S(P||Q) = \sum_i P(i) \log (P(i) / Q(i)). The relative entropy is an important info...
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11-20
2014
Quantum Journal Club： Discrete-phase-randomized coherent state source and its ap
Abstract: Coherent state photon sources are widely used in quantum information processing. In many applications, a coherent state is functioned as a mixture of Fock states by assuming its phase is co...
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11-27
2014
Quantum Journal Club: Single-photon-level quantum image memory based on cold ato
Abstract: A quantum memory is a key component for quantum networks, which will enable the distribution of quantum information. Its successful development requires storage of singlephoton light. Encod...
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11-22
2011
Quantum Computing with Defect Centers in Diamond
Abstract: The realization of a scalable quantum information processor has emerged over the past decade as one of the central challenges at the interface of fundamental science and engineering. In thi...
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11-24
2021
Numerical Method for Finite-size Security Analysis of Quantum Key Distribution
Abstract: Quantum key distribution (QKD) establishes secure links between remote communication partners. As a key problem for various QKD protocols, security analysis gives the number of secret keys ...
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04-03
2013
Quantum information and quantum technologies
Abstract: I will introduce the field of quantum simulations from a wide scientific perspective. Then, I will discuss the relevance of quantum simulations for reproducing different aspects of quantum ...