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Neural networks with quantum states of light.
Philos Trans A Math Phys Eng Sci
December 2024
Institute for Cross-Disciplinary Physics and Complex Systems (IFISC) UIB-CSIC, Campus Universitat Illes Balears, Palma de Mallorca 07122, Spain.
Quantum optical networks are instrumental in addressing the fundamental questions and enable applications ranging from communication to computation and, more recently, machine learning (ML). In particular, photonic artificial neural networks (ANNs) offer the opportunity to exploit the advantages of both classical and quantum optics. Photonic neuro-inspired computation and ML have been successfully demonstrated in classical settings, while quantum optical networks have triggered breakthrough applications such as teleportation, quantum key distribution and quantum computing.
View Article and Find Full Text PDFStable organic radicals - a material platform for developing molecular quantum technologies.
Phys Chem Chem Phys
January 2025
UCL Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK.
An electron spin is a natural candidate for a quantum bit - the quantum information storage unit. Stable organic radicals, consisting of unpaired electron spins, can thus be explored for the development of quantum science and technologies, owing to their excellent chemical tunability and their great promise for scalability. The molecular network formed by the stable organic radicals can be used for the design of spin-based quantum computing circuits.
View Article and Find Full Text PDFDeterministic quantum state and gate teleportation between distant superconducting chips.
Sci Bull (Beijing)
December 2024
Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; International Quantum Academy, Shenzhen 518048, China; Guangdong Provincial Key Laboratory of Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China. Electronic address:
Quantum teleportation is of both fundamental interest and great practical importance in quantum information science. To date, quantum teleportation has been implemented in various physical systems, among which superconducting qubits are of particular practical significance as they emerge as a leading system to realize large-scale quantum computation. Nevertheless, scaling up the number of superconducting qubits on a single chip becomes increasing challenging because of some emergent technical difficulties.
View Article and Find Full Text PDFQuantum State Transfer between Superconducting Cavities via Exchange-Free Interactions.
Phys Rev Lett
November 2024
Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, China.
We propose and experimentally demonstrate a novel protocol for transferring quantum states between superconducting cavities. This approach utilizes continuous two-mode squeezing interactions to generate entanglement without the exchange of any carrier photons. In contrast to the discrete operations of entanglement and Bell-state measurement in quantum teleportation, our scheme is symmetric and continuous.
View Article and Find Full Text PDFTeleportation of a genuine single-rail vacuum-one-photon qubit generated via a quantum dot source.
Npj Nanophoton
November 2024
Dipartimento di Fisica, Sapienza Università di Roma, Roma, Italy.
Quantum state teleportation represents a pillar of quantum information and a milestone on the roadmap towards quantum networks with a large number of nodes. Successful photonic demonstrations of this protocol have been carried out employing different qubit encodings. However, demonstrations in the Fock basis encoding are challenging, due to the impossibility of generating a coherent superposition of vacuum-one photon states on a single mode with linear optics.
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