4 papers
Imaginarity as a necessary resource for trainability in QAOA
Syed Muhammad Ali Hassan, Kostas Blekos, Stefan Kühn +2
The quantum approximate optimization algorithm (QAOA) tackles combinatorial problems by tuning a quantum circuit in a classical loop, often guided by gradients. We show that the gr…
What does measuring one qubit reveal about another? -networks as a directed diagnostic for quantum circuits
Kostas Blekos, Paulo Vitor ItaboraÃ
Many-qubit circuit states are hard to inspect directly, so they are often summarized by pairwise graph weights. Common pairwise weights report symmetric correlations, while many ci…
Processing through encoding: Quantum circuit approaches for point-wise multiplication and convolution
Andreas Papageorgiou, Paulo Vitor Itaborai, Kostas Blekos +1
This paper introduces quantum circuit methodologies for pointwise multiplication and convolution of complex functions, conceptualized as "processing through encoding". Leveraging k…
Realizing string breaking dynamics in a lattice gauge theory on quantum hardware
Constantia Alexandrou, Andreas Athenodorou, Kostas Blekos +2
We investigate static and dynamical aspects of string breaking in a lattice gauge theory coupled to Kogut-Susskind staggered fermions. Using Tensor Network simulations, we de…