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6 papers · 2 filters
Improved key rate bounds for practical decoy-state quantum key distribution systems
Zhen Zhang, Qi Zhao, Mohsen Razavi +1
The decoy-state scheme is the most widely implemented quantum key distribution protocol in practice. In order to account for the finite-size key effects on the achievable secret ke…
Non-ergodicity in open quantum systems through quantum feedback
Lewis A. Clark, Fiona Torzewska, Ben Maybee +1
It is well known that quantum feedback can alter the dynamics of open quantum systems dramatically. In this paper, we show that non-ergodicity may be induced through quantum feedba…
Hybrid quantum computing with ancillas
Timothy J. Proctor, Viv Kendon
In the quest to build a practical quantum computer, it is important to use efficient schemes for enacting the elementary quantum operations from which quantum computer programs are…
Measurement-device-independent quantum key distribution with nitrogen vacancy centers in diamond
Nicoló Lo Piparo, Mohsen Razavi, William J. Munro
Memory-assisted measurement-device-independent quantum key distribution (MA-MDI-QKD) has recently been proposed as a possible intermediate step towards the realization of quantum r…
Identifying quantum subsystems using Clausius' second law of thermodynamics
Adam Stokes, Prasenjit Deb, Almut Beige
There are many ways to decompose the Hilbert space H of a composite quantum system into tensor product subspaces. Different subsystem decompositions generally imply different inter…
Local versus Global Strategies in Multi-parameter Estimation
P. A. Knott, T. J. Proctor, A. J. Hayes +3
We consider the problem of estimating multiple phases using a multi-mode interferometer. In this setting we show that while global strategies with multi-mode entanglement can lead…