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Unlearning quantum information [PDF]
The European Physical Journal D, 2014 Quantum dynamics can be driven by measurement. By constructing measurements that gain no information, effective unitary evolution can be induced on a quantum system, for example in ancilla driven quantum computation. In the non-ideal case where a measurement does reveal some information about the system, it may be possible to "unlearn" this information
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Quantum Control and Quantum Information Technology [PDF]
The Scientific World Journal, 2013 Quantum information technology has been recognized as one of the most promising future technologies (e.g., see [1]). The development of quantum control theory is a key task for practical quantum information technology (e.g., see [2–4]. Recent advances in quantum information technologies and robust quantum information processing require the dynamics of ...
Daoyi Dong +3 more
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Distribution of high-dimensional entanglement via an intra-city free-space link
Nature Communications, 2017 Increasing the dimensionality of entangled states improves robustness and capacity of secure quantum communications, but it requires suitably modified setups.
Fabian Steinlechner +7 more
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Alternative new notation for quantum information theory [PDF]
International Journal of Theoretical Physics 2007, 2003 A new notation has been introduced for the quantum information theory. By this notation,some calculations became simple in quantum information theory such as quantum swapping, quantum teleportation.
arxiv +1 more source
Types of quantum information [PDF]
Physical Review A, 2007 Quantum, in contrast to classical, information theory, allows for different incompatible types (or species) of information which cannot be combined with each other. Distinguishing these incompatible types is useful in understanding the role of the two classical bits in teleportation (or one bit in one-bit teleportation), for discussing decoherence in ...
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Single ion qubit with estimated coherence time exceeding one hour
Nature Communications, 2021 Extending qubit coherence times represent one of the key challenges for quantum technologies. Here, after properly suppressing magnetic-field fluctuations, frequency instability and leakage of the microwave reference-oscillator, the authors infer ...
Pengfei Wang +9 more
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Nature Communications, 2017 To realize long-distance quantum communication it is required to have individually addressable quantum memories with programmable access to many cells. Here the authors report DLCZ-type quantum memories with 225 individually accessible memory cells in a ...
Y-F Pu +5 more
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npj Quantum Information, 2023 Entanglement distribution is at the heart of most quantum communication protocols. Inevitable loss of photons along quantum channels is a major obstacle for distributing entangled photons over long distances, as the no-cloning theorem forbids the ...
Lukas Achatz +9 more
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Deterministic Entanglement Swapping with Hybrid Discrete- and Continuous-Variable Systems
Photonics, 2022 The study of entanglement between discrete and continuous variables is an important theoretical and experimental topic in quantum information processing, for which entanglement swapping is one of the interesting elements. Entanglement swapping allows two
Shou-Bang Yang +4 more
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Twin-field quantum key distribution without optical frequency dissemination
Nature Communications, 2023 Twin-field (TF) quantum key distribution (QKD) has rapidly risen as the most viable solution to long-distance secure fibre communication thanks to its fundamentally repeater-like rate-loss scaling.
Lai Zhou +3 more
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