High-fidelity quantum state evolution in imperfect photonic integrated circuits

Jacob Mower, Nicholas C. Harris, Gregory R. Steinbrecher, Yoav Lahini, Dirk Englund*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We propose and analyze the design of a programmable photonic integrated circuit for high-fidelity quantum computation and simulation. We demonstrate that the reconfigurability of our design allows us to overcome two major impediments to quantum optics on a chip: it removes the need for a full fabrication cycle for each experiment and allows for compensation of fabrication errors using numerical optimization techniques. Under a pessimistic fabrication model for the silicon-on-insulator process, we demonstrate a dramatic fidelity improvement for the linear optics controlled-not and controlled-phase gates and, showing the scalability of this approach, the iterative phase estimation algorithm built from individually optimized gates. We also propose and simulate an experiment that the programmability of our system would enable: a statistically robust study of the evolution of entangled photons in disordered quantum walks. Overall, our results suggest that existing fabrication processes are sufficient to build a quantum photonic processor capable of high-fidelity operation.

Original languageEnglish
Article number032322
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - 22 Sep 2015
Externally publishedYes


Dive into the research topics of 'High-fidelity quantum state evolution in imperfect photonic integrated circuits'. Together they form a unique fingerprint.

Cite this