Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Q70: Quantum Network Algorithms and Analysis
3:00 PM–6:00 PM,
Wednesday, March 8, 2023
Room: Room 409
Sponsoring
Unit:
DQI
Chair: David Bernal Neira, USRA - Univ Space Rsch Assoc
Abstract: Q70.00006 : Optimal entanglement distribution policies in homogeneous repeater chains with cutoffs*
4:00 PM–4:12 PM
Presenter:
Álvaro G Iñesta
(TU Delft)
Authors:
Álvaro G Iñesta
(TU Delft)
Gayane Vardoyan
(Delft University of Technology)
Lara Scavuzzo
(TU Delft)
Stephanie Wehner
(Delft University of Technology)
Operations are performed according to a global-knowledge policy that determines which node performs what operation in each time step, taking into account global knowledge of the state of the entanglement already produced.
Here, we find global-knowledge policies that minimize the expected time required to produce end-to-end entanglement in homogeneous repeater chains. We model the evolution of this system as a Markov decision process, and find optimal policies using dynamic programming. We show that the advantage in expected delivery time provided by a global-knowledge optimal policy compared to a policy in which nodes only use local information increases with increasing number of nodes and decreasing probability of successful entanglement swap. Our work sheds light on how to distribute entangled pairs in large quantum networks using a chain of intermediate repeaters with cutoffs.
*We acknowledge financial support from the Netherlands Organisation for Scientific Research (NWO/OCW), as part of the Frontiers of Nanoscience program; the NWO ZK QSC Ada Lovelace Fellowship; and an ERC Starting Grant.
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