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13 papers · 2 filters
Multicasting Homogeneous and Heterogeneous Quantum States in Quantum Networks
Yi-Chang Shih, Min-Hsiu Hsieh, Hung-Yu Wei
In this paper, we target the practical implementation issues of quantum multicast networks. First, we design a recursive lossless compression that allows us to control the trade-of…
Bang-Bang Control Design for Quantum State Transfer based on Hyperspherical Coordinates and Optimal Time-energy Control
Weiwei Zhou, Sophie Schirmer, Ming Zhang +1
We present a constructive control scheme for solving quantum state engineering problems based on a parametrization of the state vector in terms of complex hyperspherical coordinate…
Arboreal Bound Entanglement
Alastair Kay
In this paper, we discuss the entanglement properties of graph-diagonal states, with particular emphasis on calculating the threshold for the transition between the presence and ab…
Perfect Quantum Routing in Regular Spin Networks
Peter J. Pemberton-Ross, Alastair Kay
Regular families of coupled quantum networks are described such the unknown state of a qubit can be perfectly routed from any node to any other node in a time linear in the distanc…
Optimal Detection of Entanglement in GHZ States
Alastair Kay
We present a broad class of states which are diagonal in the basis of N-qubit GHZ states such that non-positivity under the partial transpose operation is necessary and sufficient…
Universal coding for transmission of private information
Nilanjana Datta, Min-Hsiu Hsieh
We consider the scenario in which Alice transmits private classical messages to Bob via a classical-quantum channel, part of whose output is intercepted by an eavesdropper, Eve. We…