Deterministic quantum logic with photons via optically induced photonic band gaps

被引：69

作者：

Friedler, I ^{[1
]}

Kurizki, G

Petrosyan, D

机构：

[1] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel

[2] FORTH, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.71.023803

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the giant Kerr nonlinear interaction between two ultraweak optical fields in which the cross-phase-modulation is not accompanied by spectral broadening of the interacting pulses. This regime is realizable in atomic vapors, when a weak probe pulse, upon propagating through the electromagnetically induced transparency (EIT) medium, interacts with a signal pulse that is dynamically trapped in a photonic band gap created by spatially periodic modulation of its EIT resonance. We find that large conditional phase shifts and entanglement between the signal and probe fields can be obtained with this scheme. The attainable pi phase shift, accompanied by negligible absorption and quantum noise, is shown to allow a high-fidelity realization of the controlled-phase universal logic gate between two single-photon pulses.

引用

页数：8

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