Tuned transition from quantum to classical for macroscopic quantum states

Physical Review Letters

Volumn 106, Issue 17, 2011, Pages

  Fedorov, A ^a,d   MacHa, P ^a,b   Feofanov, A K ^a,c   Harmans, C J P M ^a   Mooij, J E ^a  

^a DELFT UNIVERSITY OF TECHNOLOGY   (Netherlands)

^b LEIBNIZ INSTITUTE OF PHOTONIC TECHNOLOGY   (Germany)

^c KARLSRUHE INSTITUTE OF TECHNOLOGY   (Germany)

^d ETH ZURICH   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

COHERENT OSCILLATIONS; FLUX QUBITS; MACROSCOPIC QUANTUM STATE; NON EQUILIBRIUM; PERSISTENT CURRENTS; PHASE COHERENCE; QUANTUM WORLD; TUNNEL BARRIER;

EID: 79960661070     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.106.170404     Document Type: Article

References (22)

1. A.J. Leggett, J. Phys. Condens. Matter JCOMEL 0953-8984 14, R415 (2002); 10.1088/0953-8984/14/15/201 (Pubitemid 34531543)
2. A.J. Leggett and A. Garg, Phys. Rev. Lett. 54, 857 (1985). PRLTAO 0031-9007 10.1103/PhysRevLett.54.857
3. M. Arndt, Nature (London) NATUAS 0028-0836 401, 680 (1999); 10.1038/44348 (Pubitemid 29485208)
4. L. Thomas, Nature (London) NATUAS 0028-0836 383, 145 (1996); 10.1038/383145a0 (Pubitemid 26303971)
5. J.R. Friedman, M.P. Sarachik, J. Tejada, and R. Ziolo, Phys. Rev. Lett. 76, 3830 (1996). PRLTAO 0031-9007 10.1103/PhysRevLett.76.3830
6. Y. Nakamura, Yu.A. Pashkin, and J.S. Tsai, Nature (London) NATUAS 0028-0836 398, 786 (1999). 10.1038/19718 (Pubitemid 29205341)
7. A. Palacios-Laloy, Nature Phys. 6, 442 (2010); NPAHAX 1745-2473 10.1038/nphys1641
8. M. Ansmann, Nature (London) NATUAS 0028-0836 461, 504 (2009). 10.1038/nature08363
9. J.I. Korsbakken, F.K. Wilhelm, and K.B. Whaley, Europhys. Lett. 89, 30003 (2010). EULEEJ 0295-5075 10.1209/0295-5075/89/30003
10. C.H. van der Wal, Science 290, 773 (2000); SCIEAS 0036-8075 10.1126/science.290.5492.773
11. J.R. Friedman, V. Patel, W. Chen, S.K. Tolpygo, and J.E. Lukens, Nature (London) NATUAS 0028-0836 406, 43 (2000). 10.1038/35017505 (Pubitemid 30460202)
12. V.E. Manucharyan, J. Koch, M. Brink, L.I. Glazman, and M.H. Devoret, arXiv:0910.3039.
13. S. Poletto, New J. Phys. 11, 013009 (2009). NJOPFM 1367-2630 10.1088/1367-2630/11/1/013009
14. M. Grajcar, A. Izmalkov, and E. Il'ichev, Phys. Rev. B PRBMDO 1098-0121 71, 144501 (2005). 10.1103/PhysRevB.71.144501 (Pubitemid 41755530)
15. J. Majer, J. Butcher, and J.E. Mooij, Appl. Phys. Lett. 80, 3638 (2002). APPLAB 0003-6951 10.1063/1.1478150 (Pubitemid 34637345)
16. F.G. Paauw, A. Fedorov, C.J.P.M Harmans, and J.E. Mooij, Phys. Rev. Lett. 102, 090501 (2009). PRLTAO 0031-9007 10.1103/PhysRevLett.102.090501
17. P. Bertet, Phys. Rev. Lett. 95, 257002 (2005). PRLTAO 0031-9007 10.1103/PhysRevLett.95.257002 (Pubitemid 41816021)
18. S.O. Valenzuela, Science 314, 1589 (2006). SCIEAS 0036-8075 10.1126/science.1134008 (Pubitemid 44907150)
19. M. Grajcar, Nature Phys. 4, 612 (2008). NPAHAX 1745-2473 10.1038/nphys1019
20. I. Bloch, Nature (London) NATUAS 0028-0836 453, 1016 (2008); 10.1038/nature07126 (Pubitemid 351871744)
21. J.R. Petta, Science 309, 2180 (2005). SCIEAS 0036-8075 10.1126/science.1116955 (Pubitemid 41396061)
22. See supplemental material at http://link.aps.org/supplemental/10.1103/ PhysRevLett.106.170404 for an analysis of decoherence for the flux qubit with tunable gap. The regime of low gaps is discussed in detail.