Large conditional single-photon cross-phase modulation
Name
Beck-2016-Large conditional si.pdf
Size
957.08 KB
Format
Adobe PDF
Checksum (MD5)
74ddb3c10d60e055dec73e5eeb11d8b8
Author(s)
Beck, Kristin Marie
Hosseini, Mahdi
Duan, Yiheng
Vuletic, Vladan
Date Issued
August 2016
Journal
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences (U.S.)
Citation
Beck, Kristin M.; Hosseini, Mahdi; Duan, Yiheng and Vuletić, Vladan. “Large Conditional Single-Photon Cross-Phase Modulation.” Proceedings of the National Academy of Sciences 113, no. 35 (August 2016): 9740–9744. © 2016 National Academy of Sciences
Version
Final published version
Abstract
Deterministic optical quantum logic requires a nonlinear quantum process that alters the phase of a quantum optical state by π through interaction with only one photon. Here, we demonstrate a large conditional cross-phase modulation between a signal field, stored inside an atomic quantum memory, and a control photon that traverses a high-finesse optical cavity containing the atomic memory. This approach avoids fundamental limitations associated with multimode effects for traveling optical photons. We measure a conditional cross-phase shift of π/6 (and up to π/3 by postselection on photons that remain in the system longer than average) between the retrieved signal and control photons, and confirm deterministic entanglement between the signal and control modes by extracting a positive concurrence. By upgrading to a state-of-the-art cavity, our system can reach a coherent phase shift of π at low loss, enabling deterministic and universal photonic quantum logic.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1073/pnas.1524117113
