.png){kind=icon}
.png){kind=icon}
Return
Large conditional single-photon cross-phase modulation
.png){kind=icon}
OA
AI
DOI：10.1073/pnas.1524117113.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Deterministic optical quantum logic requires a nonlinear quantum process that alters the phase of a quantum optical state by pi 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 pi/6 (and up to pi/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 pi at low loss, enabling deterministic and universal photonic quantum logic.
Keywords:
cross-phase modulation
photonic quantum gate
cavity quantum
electrodynamics
electromagnetically induced transparency
single-photon Kerr nonlinearity
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
P
IF:
9.1
Papers:
10.8W
Citations:
73.5W
Organization
No organization information available