Entanglement concentration of continuous-variable quantum states -: art. no. 022304

被引：39
作者：
Fiurásek, J [1 ]
Mista, L [1 ]
Filip, R [1 ]
机构：
[1] Palacky Univ, Dept Opt, Olomouc 77200, Czech Republic
来源：
PHYSICAL REVIEW A | 2003年 / 67卷 / 02期
关键词：
D O I：
10.1103/PhysRevA.67.022304
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose two probabilistic entanglement concentration schemes for a single copy of a two-mode squeezed vacuum state. The first scheme is based on the off-resonant interaction of a Rydberg atom with the cavity field while the second setup involves the cross Kerr interaction, an auxiliary mode prepared in a strong coherent state, and homodyne detection. We show that the continuous-variable entanglement concentration allows us to improve the fidelity of teleportation of coherent states.
引用
收藏
页数：7
相关论文
共 51 条
[21]  
FILIP R, QUANTPH0204105
[22]   Improving the fidelity of continuous-variable teleportation via local operations -: art. no. 012304 [J].
Fiurásek, J .
PHYSICAL REVIEW A, 2002, 66 (01) :8
[23]   Gaussian transformations and distillation of entangled Gaussian states -: art. no. 137904 [J].
Fiurásek, J .
PHYSICAL REVIEW LETTERS, 2002, 89 (13) :137904-137904
[24]   Optical implementation of continuous-variable quantum cloning machines [J].
Fiurásek, J .
PHYSICAL REVIEW LETTERS, 2001, 86 (21) :4942-4945
[25]   Unconditional quantum teleportation [J].
Furusawa, A ;
Sorensen, JL ;
Braunstein, SL ;
Fuchs, CA ;
Kimble, HJ ;
Polzik, ES .
SCIENCE, 1998, 282 (5389) :706-709
[26]   Generation of optical macroscopic quantum superposition states via state reduction with a Mach-Zehnder interferometer containing a Kerr medium [J].
Gerry, CC .
PHYSICAL REVIEW A, 1999, 59 (05) :4095-4098
[27]   Characterization of Gaussian operations and distillation of Gaussian states [J].
Giedke, G ;
Cirac, JI .
PHYSICAL REVIEW A, 2002, 66 (03) :7
[28]   Continuous variable quantum cryptography using coherent states [J].
Grosshans, F ;
Grangier, P .
PHYSICAL REVIEW LETTERS, 2002, 88 (05) :4
[29]   Light speed reduction to 17 metres per second in an ultracold atomic gas [J].
Hau, LV ;
Harris, SE ;
Dutton, Z ;
Behroozi, CH .
NATURE, 1999, 397 (6720) :594-598
[30]   Quantum cryptography with squeezed states [J].
Hillery, M .
PHYSICAL REVIEW A, 2000, 61 (02) :8
123456