5 papers
Constant-space-overhead fault-tolerant quantum input/output and communication
Paula Belzig, Hayata Yamasaki
Fault-tolerant capacities quantify the ability of a quantum channel to reliably transmit information when every component of the encoding and decoding procedure is noisy. Earlier w…
Quantum -divergences and Their Local Behaviour: An Analysis via Relative Expansion Coefficients
Shreyas Iyer, Peixue Wu, Paula Belzig +1
Any reasonable measure of distinguishability of quantum states must satisfy a data processing inequality, that is, it must not increase under the action of a quantum channel. We ca…
Reverse-type Data Processing Inequality
Paula Belzig, Li Gao, Graeme Smith +1
The quantum data processing inequality asserts that two quantum states become harder to distinguish when a noisy channel is applied. On the other hand, a reverse quantum data proce…
Fundamental Limit on the Power of Entanglement Assistance in Quantum Communication
Lasse H. Wolff, Paula Belzig, Matthias Christandl +2
The optimal rate of reliable communication over a quantum channel can be enhanced by pre-shared entanglement. Whereas the enhancement may be unbounded in infinite-dimensional setti…
Quantum communication and fault-tolerance
Paula Belzig
In this thesis, we are interested in the limits of quantum communication with and without entanglement, and with and without noise assumptions on the communication setup. When a se…