Deterministic photon-photon √SWAP gate using a Λ system

被引：109
作者：
Koshino, Kazuki [1 ,2 ]
Ishizaka, Satoshi [3 ]
Nakamura, Yasunobu [4 ,5 ,6 ]
机构：
[1] Tokyo Med & Dent Univ, Coll Liberal Arts & Sci, Ichikawa 2720827, Japan
[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan
[3] Hiroshima Univ, Grad Sch Integrated Arts & Sci, Higashihiroshima 7398521, Japan
[4] NEC Corp Ltd, Green Innovat Res Labs, Tsukuba, Ibaraki 3058501, Japan
[5] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
[6] Univ Tokyo, INQIE, Meguro Ku, Tokyo 1538505, Japan
来源：
PHYSICAL REVIEW A | 2010年 / 82卷 / 01期
关键词：
QUANTUM COMPUTATION; ELECTRON-SPIN; PHASE-SHIFTS;
D O I：
10.1103/PhysRevA.82.010301
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We theoretically present a method to realize a deterministic photon-photon root SWAP gate using a three-level Lambda system interacting with single photons in reflection geometry. The Lambda system is used completely passively as a temporary memory for a photonic qubit; the initial state of the Lambda system may be arbitrary, and active control by auxiliary fields is unnecessary throughout the gate operations. These distinct merits make this entangling gate suitable for deterministic and scalable quantum computation.
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页数：4
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