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10 papers · 2 filters
Measurement-free preparation of grid states
Jacob Hastrup, Kimin Park, Jonatan Bohr Brask +2
Quantum computing potentially offers exponential speed-ups over classical computing for certain tasks. A central, outstanding challenge to making quantum computing practical is to…
Deterministic generation of a four-component optical cat state
Jacob Hastrup, Jonas Schou Neergaard-Nielsen, Ulrik Lund Andersen
The four-component cat state represents a particularly useful quantum state for realizing fault-tolerant continuous variable quantum computing. While such encoding has been experim…
Cavity-Enhanced Photon Emission from a Single Germanium-Vacancy Center in a Diamond Membrane
Rasmus Høy Jensen, Erika Janitz, Yannik Fontana +9
The nitrogen-vacancy center in diamond has been explored extensively as a light-matter interface for quantum information applications, however it is limited by low coherent photon…
Boosting the secret key rate in a shared quantum and classical fibre communication system
Davide Bacco, Beatrice Da Lio, Daniele Cozzolino +14
During the last 20 years, the advance of communication technologies has generated multiple exciting applications. However, classical cryptography, commonly adopted to secure curren…
Tomography of a Feedback Measurement with Photon Detection
Shuro Izumi, Jonas S. Neergaard-Nielsen, Ulrik L. Andersen
Quantum measurement is essential to both the foundations and practical applications of quantum information science. Among many possible models of quantum measurement, feedback meas…
A Compact, Mobile, Low-Threshold Squeezed Light Source
Jens Arnbak, Christian Scheffmann Jacobsen, Rayssa Bruzaca de Andrade +4
Strongly squeezed light finds many important applications within the fields of quantum metrology, quantum communication and quantum computation. However, due to the bulkiness and c…
Advances in Quantum Cryptography
S. Pirandola, U. L. Andersen, L. Banchi +15
Quantum cryptography is arguably the fastest growing area in quantum information science. Novel theoretical protocols are designed on a regular basis, security proofs are constantl…
Deterministic generation of a two-dimensional cluster state
Mikkel V. Larsen, Xueshi Guo, Casper R. Breum +2
Measurement-based quantum computation offers exponential computational speed-up via simple measurements on a large entangled cluster state. We propose and demonstrate a scalable sc…
Distributed quantum sensing in a continuous variable entangled network
Xueshi Guo, Casper R. Breum, Johannes Borregaard +6
Networking plays a ubiquitous role in quantum technology. It is an integral part of quantum communication and has significant potential for upscaling quantum computer technologies…
Squeezed vacuum states from a whispering gallery mode resonator
Alexander Otterpohl, Florian Sedlmeir, Ulrich Vogl +9
Squeezed vacuum states enable optical measurements below the quantum limit and hence are a valuable resource for applications in quantum metrology and also quantum communication. H…