Mark M. Wilde

Information-theoretic limitations on approximate quantum cloning and broadcasting

2017 · Physical Review A

We prove quantitative limitations on any approximate simultaneous cloning or broadcasting of mixed states. The results are based on information-theoretic (entropic) considerations and generalize the well-known no-cloning and no-broadcasting theorems. We also observe and exploit …

Bounding the energy-constrained quantum and private capacities of bosonic thermal channels.

2017

We establish three different upper bounds on the energy-constrained quantum and private capacities of bosonic thermal channels. The first upper which we call the bound, is obtained by decomposing a thermal channel as a pure-loss …

Resource theory of asymmetric distinguishability

2019 · Physical Review Research

This paper puts forward the proposition that distinguishability is a resource that can be quantified and interconverted by means of basic units. The authors also show that relative entropy and its variants find fundamental operational …

Resource theory of entanglement for bipartite quantum channels

2019 · arXiv (Cornell University)

The traditional perspective in quantum resource theories concerns how to use free operations to convert one resourceful quantum state to another one. For example, a fundamental and well known question in entanglement theory is to …

Multipartite Intrinsic Non-Locality and Device-Independent Conference Key Agreement

2021 · arXiv (Cornell University)

In this work, we introduce multipartite intrinsic non-locality as a method for quantifying resources in the multipartite scenario of device-independent (DI) conference key agreement. We prove that multipartite intrinsic non-locality is additive, convex, and monotone …

Testing symmetry on quantum computers

2021 · arXiv (Cornell University)

Symmetry is a unifying concept in physics. In quantum information and beyond, it is known that quantum states possessing symmetry are not useful for certain information-processing tasks. For example, states that commute with a Hamiltonian …

Unextendible entanglement of quantum channels

2024 · arXiv (Cornell University)

Quantum communication relies on the existence of high quality quantum channels to exchange information. In practice, however, all communication links are affected by noise from the environment. Here we investigate the ability of quantum channels …