English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a scheme for obtaining entangled photons and quantum phase gatesin a room-temperature four-state tripod-type atomic system with two-mode activeRaman gain (ARG). We analyze the linear and nonlinear optical response of thisARG system and show that the scheme is fundamentally different from those basedon electromagnetically induced transparency and hence can avoid significantprobe-field absorption as well as temperature-related Doppler effect. Wedemonstrate that highly entangled photon pairs can be produced and rapidlyresponding polarization qubit phase gates can be constructed based on theunique features of enhanced cross-phase modulation and superluminal probe-fieldpropagation of the system.

Highly Entangled Photons and Rapidly Responding Polarization Qubit Phase Gates in a Room-Temperature Active Raman Gain Medium