01Frédéric Gessler, Philip Brisk, and Mirjana Stojilović
VLSID · 2020
Summary
This work develops a shared-memory, multithreaded implementation of RePlAce aimed at its dominant runtime bottlenecks. Cache-aware data structures, privatized accumulation, loop fission, and workload balancing reduce memory contention and improve scaling. Across 2–12 threads, the main density, wirelength, and gradient stages accelerate substantially; on 12 CPU cores, the complete placer runs about three times faster than the original RePlAce baseline and roughly 3.5 times faster than CPU-based DREAMPlace.
02Elias Riedel Gårding, Nicolas Schwaller, Su Yeon Chang, Samuel Bosch, Willy Robert Laborde, Javier Naya Hernandez, Chun Lam Chan, Frédéric Gessler, Xinyu Si, Marc-André Dupertuis, and Nicolas Macris
arXiv:1912.06105 · 2019
Summary
This paper introduces specialized quantum circuits for preparing the complete family of Bell-diagonal states, including Werner states, and evaluates them on IBM Quantum hardware. It adapts tomography to a two-qubit circuit using parallel classical bits, then compares experimental entanglement, CHSH non-locality, steering, and discord with theoretical predictions across the state space. The work also establishes a general relationship between quantum discord and asymmetric relative entropy of discord, proving equality for Bell-diagonal states.