Delegated quantum computing (DQC) enables limited clients to perform operations that are outside their capabilities remotely on a quantum server. Protocols for DQC are usually set up in the measurement-based… Weiter »Equivalence in delegated quantum computing
Sharing multi-partite quantum entanglement between parties allows for diverse secure communication tasks to be performed. Among them, conference key agreement (CKA), an extension of key distribution to multiple parties, has… Weiter »Anonymous conference key agreement in linear quantum networks
We propose two schemes to obtain Gottesman-Kitaev-Preskill (GKP) error syndromes by means of linear-optical operations, homodyne measurements, and GKP ancillas. This includes showing that for a concatenation of GKP codes… Weiter »Quantum error correction with higher Gottesman-Kitaev-Preskill codes: Minimal measurements and linear optics
We present an exact rate analysis for a secret key that can be shared among two parties employing a linear quantum repeater chain. One of our main motivations is to… Weiter »Exact rate analysis for quantum repeaters with imperfect memories and entanglement swapping as soon as possible
Quantum error correcting codes (QECCs) are the means of choice whenever quantum systems suffer errors, e.g., due to imperfect devices, environments, or faulty channels. By now, a plethora of families… Weiter »Optimizing quantum codes with an application to the loss channel with partial erasure information
Transmission of classical information over a quantum state-dependent channel is considered, when the encoder can measure channel side information (CSI) and is required to mask information on the quantum channel… Weiter »Classical State Masking over a Quantum Channel
Quantum communication research has in recent years shifted to include multi-partite networks for which questions of quantum network routing naturally emerge. To understand the potential for multi-partite routing, we focus… Weiter »Limitations of nearest-neighbour quantum networks
Entanglement swapping and heralding are at the heart of many protocols for distributed quantum information. For photons, this typically involves Bell state measurements based on two-photon interference effects. In this… Weiter »Two-Photon Interference of Single Photons from Dissimilar Sources
Communication over a quantum multiple-access channel (MAC) with cribbing encoders is considered, whereby Transmitter 2 performs a measurement on a system that is entangled with Transmitter 1. Based on the… Weiter »The Quantum Multiple-Access Channel with Cribbing Encoders
Identification over quantum broadcast channels is considered. As opposed to the information transmission task, the decoder only identifies whether a message of his choosing was sent or not. This relaxation… Weiter »Identification Over Quantum Broadcast Channels