Title of article :
Efficient solid state memories for quantum cryptography
Author/Authors :
F. Beaudoux، نويسنده , , R. Marino، نويسنده , , J. Lejay، نويسنده , , A. Ferrier، نويسنده , , B. Tumino، نويسنده , , O. Guillot-Noël، نويسنده , , Ph. Goldner، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
4
From page :
469
To page :
472
Abstract :
Long distance quantum cryptography requires quantum repeaters which use quantum memories. The latter are designed to store and retrieve photon quantum states on demand. Although quantum memories have been demonstrated in atomic vapors and ultra cold gases, a solid state alternative may better fulfill quantum memories requirements. Rare earth based crystals, which exhibit long coherence lifetimes, are actively studied for this purpose. Memory efficiency, i.e. the probability to retrieve a photon after storage, should be close to unity for practical applications. This can be achieved in highly doped crystals. Although Pr–Pr interactions could be detrimental in this case, we show that in a 3% Pr3+ doped La2(WO4)3 crystal ground state hyperfine coherence lifetime is still close to that measured at low Pr concentration. Since the latter determines the memory storage time, this result suggests that highly doped crystals may be useful for efficient quantum memories.
Keywords :
quantum memory , Coherent spectroscopy , Praseodymium
Journal title :
Journal of Luminescence
Serial Year :
2011
Journal title :
Journal of Luminescence
Record number :
1260350
Link To Document :
بازگشت