Abstract

We investigate the Fano resonance of the scattering spectra in a system consisting of a metal nanowire coupled to two colloidal quantum dots. By varying the coupling strengths and the energy spacings of the quantum dot qubits, we find that both the line shapes and the presence of the Fano resonance can be controlled. Furthermore, the degree of two-qubit entanglement can vary from unity to zero when the Fano resonance occurs. This indicates that there exists correlations between the two-qubit entanglement and the Fano resonance.

© 2012 Optical Society of America

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  2. G. Y. Chen, Y. N. Chen, and D. S. Chuu, Opt. Lett. 33, 2212 (2008).
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    [CrossRef]
  4. R. Zia and M. L. Brongersma, Nat. Nanotechnol. 2, 426 (2007).
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  6. A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
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  8. D. E. Chang, A. S. Sorensen, P. R. Hemmer, and M. D. Lukin, Phys. Rev. Lett. 97, 053002 (2006).
    [CrossRef]
  9. Y. N. Chen, G. Y. Chen, Y. Y. Liao, N. Lambert, and F. Nori, Phys. Rev. B 79, 245312 (2009).
    [CrossRef]
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    [CrossRef]
  13. N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
    [CrossRef]
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    [CrossRef]
  15. U. Fano, Phys. Rev. 124, 1866 (1961).
    [CrossRef]
  16. A. E. Miroshnichenko, S. Flach, and Y. S. Kivshar, Rev. Mod. Phys. 82, 2257 (2010).
    [CrossRef]
  17. B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
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  18. W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Express 18, 10360 (2010).
    [CrossRef]
  19. W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Lett. 36, 3602 (2011).
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  20. J. T. Shen and S. Fan, Opt. Lett. 30, 2001 (2005).
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2011 (2)

W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Lett. 36, 3602 (2011).
[CrossRef]

G. Y. Chen, N. Lambert, C. H. Chou, Y. N. Chen, and F. Nori, Phys. Rev. B 84, 045310 (2011).
[CrossRef]

2010 (5)

A. E. Miroshnichenko, S. Flach, and Y. S. Kivshar, Rev. Mod. Phys. 82, 2257 (2010).
[CrossRef]

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Express 18, 10360 (2010).
[CrossRef]

N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
[CrossRef]

M. T. Cheng, Y. Q. Luo, P. Z. Wang, and G. X. Zhao, Appl. Phys. Lett. 97, 191903 (2010).
[CrossRef]

2009 (4)

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

P. Berini, Adv. Opt. Photon. 1, 484 (2009).
[CrossRef]

Y. N. Chen, G. Y. Chen, D. S. Chuu, and T. Brandes, Phys. Rev. A 79, 033815 (2009).
[CrossRef]

Y. N. Chen, G. Y. Chen, Y. Y. Liao, N. Lambert, and F. Nori, Phys. Rev. B 79, 245312 (2009).
[CrossRef]

2008 (2)

G. Y. Chen, Y. N. Chen, and D. S. Chuu, Opt. Lett. 33, 2212 (2008).
[CrossRef]

K. Y. Bliokh, Y. P. Bliokh, V. Freilikher, S. Savel’ev, and F. Nori, Rev. Mod. Phys. 80, 1201 (2008).
[CrossRef]

2007 (5)

R. Zia and M. L. Brongersma, Nat. Nanotechnol. 2, 426 (2007).
[CrossRef]

D. E. Chang, A. S. Sørensen, E. A. Demler, and M. D. Lukin, Nat. Phys. 3, 807 (2007).
[CrossRef]

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

Y. Fedutik, V. V. Temnov, O. Schöps, U. Woggon, and M. V. Artemyev, Phys. Rev. Lett. 99, 136802 (2007).
[CrossRef]

F. Buscemi, P. Bordone, and A. Bertoni, Phys. Rev. B, 76, 195317 (2007).
[CrossRef]

2006 (1)

D. E. Chang, A. S. Sorensen, P. R. Hemmer, and M. D. Lukin, Phys. Rev. Lett. 97, 053002 (2006).
[CrossRef]

2005 (1)

2003 (1)

W. L. Barnes, A. Dereux, and T. W. Ebbesen, Nature 424, 824 (2003).
[CrossRef]

1998 (1)

W. K. Wootters, Phys. Rev. Lett. 80, 2245 (1998).
[CrossRef]

1961 (1)

U. Fano, Phys. Rev. 124, 1866 (1961).
[CrossRef]

Akimov, A. V.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

Artemyev, M. V.

Y. Fedutik, V. V. Temnov, O. Schöps, U. Woggon, and M. V. Artemyev, Phys. Rev. Lett. 99, 136802 (2007).
[CrossRef]

Barnes, W. L.

W. L. Barnes, A. Dereux, and T. W. Ebbesen, Nature 424, 824 (2003).
[CrossRef]

Berini, P.

Bertoni, A.

F. Buscemi, P. Bordone, and A. Bertoni, Phys. Rev. B, 76, 195317 (2007).
[CrossRef]

Bliokh, K. Y.

K. Y. Bliokh, Y. P. Bliokh, V. Freilikher, S. Savel’ev, and F. Nori, Rev. Mod. Phys. 80, 1201 (2008).
[CrossRef]

Bliokh, Y. P.

K. Y. Bliokh, Y. P. Bliokh, V. Freilikher, S. Savel’ev, and F. Nori, Rev. Mod. Phys. 80, 1201 (2008).
[CrossRef]

Bordone, P.

F. Buscemi, P. Bordone, and A. Bertoni, Phys. Rev. B, 76, 195317 (2007).
[CrossRef]

Brandes, T.

Y. N. Chen, G. Y. Chen, D. S. Chuu, and T. Brandes, Phys. Rev. A 79, 033815 (2009).
[CrossRef]

Brongersma, M. L.

R. Zia and M. L. Brongersma, Nat. Nanotechnol. 2, 426 (2007).
[CrossRef]

Buscemi, F.

F. Buscemi, P. Bordone, and A. Bertoni, Phys. Rev. B, 76, 195317 (2007).
[CrossRef]

Chang, D. E.

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

D. E. Chang, A. S. Sørensen, E. A. Demler, and M. D. Lukin, Nat. Phys. 3, 807 (2007).
[CrossRef]

D. E. Chang, A. S. Sorensen, P. R. Hemmer, and M. D. Lukin, Phys. Rev. Lett. 97, 053002 (2006).
[CrossRef]

Chen, G. Y.

W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Lett. 36, 3602 (2011).
[CrossRef]

G. Y. Chen, N. Lambert, C. H. Chou, Y. N. Chen, and F. Nori, Phys. Rev. B 84, 045310 (2011).
[CrossRef]

W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Express 18, 10360 (2010).
[CrossRef]

Y. N. Chen, G. Y. Chen, Y. Y. Liao, N. Lambert, and F. Nori, Phys. Rev. B 79, 245312 (2009).
[CrossRef]

Y. N. Chen, G. Y. Chen, D. S. Chuu, and T. Brandes, Phys. Rev. A 79, 033815 (2009).
[CrossRef]

G. Y. Chen, Y. N. Chen, and D. S. Chuu, Opt. Lett. 33, 2212 (2008).
[CrossRef]

Chen, W.

Chen, Y. N.

W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Lett. 36, 3602 (2011).
[CrossRef]

G. Y. Chen, N. Lambert, C. H. Chou, Y. N. Chen, and F. Nori, Phys. Rev. B 84, 045310 (2011).
[CrossRef]

W. Chen, G. Y. Chen, and Y. N. Chen, Opt. Express 18, 10360 (2010).
[CrossRef]

Y. N. Chen, G. Y. Chen, D. S. Chuu, and T. Brandes, Phys. Rev. A 79, 033815 (2009).
[CrossRef]

Y. N. Chen, G. Y. Chen, Y. Y. Liao, N. Lambert, and F. Nori, Phys. Rev. B 79, 245312 (2009).
[CrossRef]

G. Y. Chen, Y. N. Chen, and D. S. Chuu, Opt. Lett. 33, 2212 (2008).
[CrossRef]

Cheng, M. T.

M. T. Cheng, Y. Q. Luo, P. Z. Wang, and G. X. Zhao, Appl. Phys. Lett. 97, 191903 (2010).
[CrossRef]

Chong, C. T.

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Chou, C. H.

G. Y. Chen, N. Lambert, C. H. Chou, Y. N. Chen, and F. Nori, Phys. Rev. B 84, 045310 (2011).
[CrossRef]

Chuu, D. S.

Y. N. Chen, G. Y. Chen, D. S. Chuu, and T. Brandes, Phys. Rev. A 79, 033815 (2009).
[CrossRef]

G. Y. Chen, Y. N. Chen, and D. S. Chuu, Opt. Lett. 33, 2212 (2008).
[CrossRef]

de Leon Snapp, N.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

Demler, E. A.

D. E. Chang, A. S. Sørensen, E. A. Demler, and M. D. Lukin, Nat. Phys. 3, 807 (2007).
[CrossRef]

Dereux, A.

W. L. Barnes, A. Dereux, and T. W. Ebbesen, Nature 424, 824 (2003).
[CrossRef]

Ebbesen, T. W.

W. L. Barnes, A. Dereux, and T. W. Ebbesen, Nature 424, 824 (2003).
[CrossRef]

Falk, A. L.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

Fan, S.

Fano, U.

U. Fano, Phys. Rev. 124, 1866 (1961).
[CrossRef]

Fedutik, Y.

Y. Fedutik, V. V. Temnov, O. Schöps, U. Woggon, and M. V. Artemyev, Phys. Rev. Lett. 99, 136802 (2007).
[CrossRef]

Flach, S.

A. E. Miroshnichenko, S. Flach, and Y. S. Kivshar, Rev. Mod. Phys. 82, 2257 (2010).
[CrossRef]

Freilikher, V.

K. Y. Bliokh, Y. P. Bliokh, V. Freilikher, S. Savel’ev, and F. Nori, Rev. Mod. Phys. 80, 1201 (2008).
[CrossRef]

Giessen, H.

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Halas, N. J.

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Hao, Z. H.

N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
[CrossRef]

Hemmer, P. R.

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

D. E. Chang, A. S. Sorensen, P. R. Hemmer, and M. D. Lukin, Phys. Rev. Lett. 97, 053002 (2006).
[CrossRef]

Jo, M.-H.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

Kang, K.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

Kim, N. C.

N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
[CrossRef]

Kivshar, Y. S.

A. E. Miroshnichenko, S. Flach, and Y. S. Kivshar, Rev. Mod. Phys. 82, 2257 (2010).
[CrossRef]

Koppens, F. H. L.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

Lambert, N.

G. Y. Chen, N. Lambert, C. H. Chou, Y. N. Chen, and F. Nori, Phys. Rev. B 84, 045310 (2011).
[CrossRef]

Y. N. Chen, G. Y. Chen, Y. Y. Liao, N. Lambert, and F. Nori, Phys. Rev. B 79, 245312 (2009).
[CrossRef]

Li, J. B.

N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
[CrossRef]

Liao, Y. Y.

Y. N. Chen, G. Y. Chen, Y. Y. Liao, N. Lambert, and F. Nori, Phys. Rev. B 79, 245312 (2009).
[CrossRef]

Luk’yanchuk, B.

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Lukin, M. D.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

D. E. Chang, A. S. Sørensen, E. A. Demler, and M. D. Lukin, Nat. Phys. 3, 807 (2007).
[CrossRef]

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

D. E. Chang, A. S. Sorensen, P. R. Hemmer, and M. D. Lukin, Phys. Rev. Lett. 97, 053002 (2006).
[CrossRef]

Luo, Y. Q.

M. T. Cheng, Y. Q. Luo, P. Z. Wang, and G. X. Zhao, Appl. Phys. Lett. 97, 191903 (2010).
[CrossRef]

Maier, S. A.

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Miroshnichenko, A. E.

A. E. Miroshnichenko, S. Flach, and Y. S. Kivshar, Rev. Mod. Phys. 82, 2257 (2010).
[CrossRef]

Mukherjee, A.

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

Nordlander, P.

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Nori, F.

G. Y. Chen, N. Lambert, C. H. Chou, Y. N. Chen, and F. Nori, Phys. Rev. B 84, 045310 (2011).
[CrossRef]

Y. N. Chen, G. Y. Chen, Y. Y. Liao, N. Lambert, and F. Nori, Phys. Rev. B 79, 245312 (2009).
[CrossRef]

K. Y. Bliokh, Y. P. Bliokh, V. Freilikher, S. Savel’ev, and F. Nori, Rev. Mod. Phys. 80, 1201 (2008).
[CrossRef]

Park, H.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

Savel’ev, S.

K. Y. Bliokh, Y. P. Bliokh, V. Freilikher, S. Savel’ev, and F. Nori, Rev. Mod. Phys. 80, 1201 (2008).
[CrossRef]

Schöps, O.

Y. Fedutik, V. V. Temnov, O. Schöps, U. Woggon, and M. V. Artemyev, Phys. Rev. Lett. 99, 136802 (2007).
[CrossRef]

Shen, J. T.

Sorensen, A. S.

D. E. Chang, A. S. Sorensen, P. R. Hemmer, and M. D. Lukin, Phys. Rev. Lett. 97, 053002 (2006).
[CrossRef]

Sørensen, A. S.

D. E. Chang, A. S. Sørensen, E. A. Demler, and M. D. Lukin, Nat. Phys. 3, 807 (2007).
[CrossRef]

Temnov, V. V.

Y. Fedutik, V. V. Temnov, O. Schöps, U. Woggon, and M. V. Artemyev, Phys. Rev. Lett. 99, 136802 (2007).
[CrossRef]

Wang, P. Z.

M. T. Cheng, Y. Q. Luo, P. Z. Wang, and G. X. Zhao, Appl. Phys. Lett. 97, 191903 (2010).
[CrossRef]

Wang, Q. Q.

N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
[CrossRef]

Woggon, U.

Y. Fedutik, V. V. Temnov, O. Schöps, U. Woggon, and M. V. Artemyev, Phys. Rev. Lett. 99, 136802 (2007).
[CrossRef]

Wootters, W. K.

W. K. Wootters, Phys. Rev. Lett. 80, 2245 (1998).
[CrossRef]

Yang, Z. J.

N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
[CrossRef]

Yu, C. L.

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

Zhao, G. X.

M. T. Cheng, Y. Q. Luo, P. Z. Wang, and G. X. Zhao, Appl. Phys. Lett. 97, 191903 (2010).
[CrossRef]

Zheludev, N. I.

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Zia, R.

R. Zia and M. L. Brongersma, Nat. Nanotechnol. 2, 426 (2007).
[CrossRef]

Zibrov, A. S.

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

Adv. Opt. Photon. (1)

Appl. Phys. Lett. (2)

N. C. Kim, J. B. Li, Z. J. Yang, Z. H. Hao, and Q. Q. Wang, Appl. Phys. Lett. 97, 061110 (2010).
[CrossRef]

M. T. Cheng, Y. Q. Luo, P. Z. Wang, and G. X. Zhao, Appl. Phys. Lett. 97, 191903 (2010).
[CrossRef]

Nat. Mater. (1)

B. Luk’yanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong, Nat. Mater. 9, 707 (2010).
[CrossRef]

Nat. Nanotechnol. (1)

R. Zia and M. L. Brongersma, Nat. Nanotechnol. 2, 426 (2007).
[CrossRef]

Nat. Phys. (2)

D. E. Chang, A. S. Sørensen, E. A. Demler, and M. D. Lukin, Nat. Phys. 3, 807 (2007).
[CrossRef]

A. L. Falk, F. H. L. Koppens, C. L. Yu, K. Kang, N. de Leon Snapp, A. V. Akimov, M.-H. Jo, M. D. Lukin, and H. Park, Nat. Phys. 5, 475 (2009).
[CrossRef]

Nature (2)

W. L. Barnes, A. Dereux, and T. W. Ebbesen, Nature 424, 824 (2003).
[CrossRef]

A. V. Akimov, A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin, Nature 450, 402 (2007).
[CrossRef]

Opt. Express (1)

Opt. Lett. (3)

Phys. Rev. (1)

U. Fano, Phys. Rev. 124, 1866 (1961).
[CrossRef]

Phys. Rev. A (1)

Y. N. Chen, G. Y. Chen, D. S. Chuu, and T. Brandes, Phys. Rev. A 79, 033815 (2009).
[CrossRef]

Phys. Rev. B (3)

G. Y. Chen, N. Lambert, C. H. Chou, Y. N. Chen, and F. Nori, Phys. Rev. B 84, 045310 (2011).
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Figures (3)

Fig. 1.
Fig. 1.

Schematic diagrams of a metal nanowire coupled to two semiconductor QDs. The two-level QDs are coherently interconnected via the metal-nanowire surface plasmons.

Fig. 2.
Fig. 2.

Transmission spectra of the incident SP for (a) the ratio of the coupling strength g1/g2=2 (red-dashed) and 5 (black-solid). (b) g1/g2=5 and the detuning δ2=0.5 (black-solid), 0.3 (red-dashed), 0.1 (blue-dotted), and 0 (green-dot-dashed). Here, the inter-QD distance d is assumed to be much smaller than the wavelength of the incident SP. The detuning δ1 is fixed to be 0.5, k0 is set to be 15, and A is set to be 0.1. Parameters are in units of g1.

Fig. 3.
Fig. 3.

(a) Comparison between the transmission spectrum (black-solid) and the two-qubit concurrence C (red-dashed) for δ1=0.5, δ2=0.5, k0=15, g1/g2=5, and A=0.1. (b) The corresponding population probabilities ξkj of the concurrence in (a). (c) The concurrence C as functions of the wave vector k and the detuning δ2. Other parameters are adopted from those in (a). Here, the inter-QD distance d is assumed to be much smaller than the wavelength of the incident SP. Parameters are in units of g1.

Equations (4)

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H=kωkakak+j=1,2Ωjσej,ej+kj=1,2gj[akeik(j1)dσej,gj+H.c.],
|Ek=dz[ϕk,R(z)CR(z)+ϕk,L(z)CL(z)]|g1,g2|0+j=1,2ξkjσej,gj|g1,g2|0,
k=k0±(g12δ2+g22δ1)A(g12+g22),
k=k0±(g1δ2+g2δ1)A(g1+g2)ork=k0±(g1δ2g2δ1)A(g1g2).

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