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Acta Physica Polonica A, 2021 This review article is based on a lecture on quantum information given at the XLVI Extraordinary Congress of Polish Physicists, Warsaw, Poland, October 16-18, 2020, on the occasion of the centenary of the Polish Physical Society. 37 pages, 4 figures.
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Infrared Quantum Information [PDF]
Physical Review Letters, 2017 We discuss information-theoretic properties of low-energy photons and gravitons in the S-matrix. Given an incoming n-particle momentum eigenstate, we demonstrate that unobserved soft photons decohere nearly all outgoing momentum superpositions of charged particles, while the universality of gravity implies that soft gravitons decohere nearly all ...
Carney, Daniel +3 more
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Quantum information transmission [PDF]
Quantum Information Processing, 2012 We present a scheme of quantum information transmission, which transmits the quantum information contained in a single qubit via the quantum correlation shared by two parties (a two-qubit channel), whose quantum discord is non-zero. We demonstrate that the quantum correlation, which may have no entanglement, is sufficient to transmit the information of
Lei Wang +3 more
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An ultra-high gain single-photon transistor in the microwave regime
Nature Communications, 2022 Successfully controlling an optical signal by a single gate photon would have great applicability for quantum networks and all-optical computing. Here, the authors realise a single-photon transistor in the microwave regime based on superconducting ...
Zhiling Wang +11 more
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Observation of a quantum phase transition in the quantum Rabi model with a single trapped ion
Nature Communications, 2021 Quantum phase transition occurs in many-body systems with abrupt changes in the ground state around zero temperature. Here the authors report signatures of quantum phase transition in single trapped ion that can be described using quantum Rabi model.
M.-L. Cai +9 more
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Coherent memory for microwave photons based on long-lived mechanical excitations
npj Quantum Information, 2023 Mechanical resonators, due to their capability to host ultralong-lived phonon modes, are particularly attractive for quantum state storage and as memory elements in conjunction with quantum computing and communication networks.
Yulong Liu +5 more
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Quantum information outside quantum information
, 2023 Quantum theory, as counter-intuitive as a theory can get, has turned out to make predictions of the physical world that match observations so precisely that it has been described as the most accurate physical theory ever devised. Viewing quantum entanglement, superposition and interference not as undesirable necessities but as interesting resources ...
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Deep quantum neural networks on a superconducting processor
Nature Communications, 2023 Deep learning and quantum computing have achieved dramatic progresses in recent years. The interplay between these two fast-growing fields gives rise to a new research frontier of quantum machine learning.
Xiaoxuan Pan +12 more
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Characterizing noise correlation and enhancing coherence via qubit motion
Fundamental Research, 2021 The identification of spacial noise correlation is of critical importance in developing error-corrected quantum devices, but it has barely been studied so far. In this work, we utilize an effective method called qubit motion, to efficiently determine the
Jiaxiu Han +13 more
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Gaussian quantum information [PDF]
Reviews of Modern Physics, 2012 The science of quantum information has arisen over the last two decades centered on the manipulation of individual quanta of information, known as quantum bits or qubits. Quantum computers, quantum cryptography and quantum teleportation are among the most celebrated ideas that have emerged from this new field.
Weedbrook, Christian +6 more
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