Measurement of geometric dephasing using a superconducting qubit

Verfasser / Beitragende:
[Stefan Berger, Marek Pechal, Philipp Kurpiers, Abdufarrukh A. Abdumalikov, Christopher Eichler, Jonas A. Mlynek, Alexander G. Shnirman, Yuval Gefen, Andreas Wallraff, Stefan Filipp]
Ort, Verlag, Jahr:
2015
Enthalten in:
Nature Communications, 6, p. 8757
Format:
Artikel (online)
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024 7 0 |a 10.3929/ethz-b-000106305  |2 doi 
024 7 0 |a 10.1038/ncomms9757  |2 doi 
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245 0 0 |a Measurement of geometric dephasing using a superconducting qubit  |h [Elektronische Daten]  |c [Stefan Berger, Marek Pechal, Philipp Kurpiers, Abdufarrukh A. Abdumalikov, Christopher Eichler, Jonas A. Mlynek, Alexander G. Shnirman, Yuval Gefen, Andreas Wallraff, Stefan Filipp] 
246 0 |a Nat Commun 
506 |a Open access  |2 ethresearch 
520 3 |a A quantum system interacting with its environment is subject to dephasing, which ultimately destroys the information it holds. Here we use a superconducting qubit to experimentally show that this dephasing has both dynamic and geometric origins. It is found that geometric dephasing, which is present even in the adiabatic limit and when no geometric phase is acquired, can either reduce or restore coherence depending on the orientation of the path the qubit traces out in its projective Hilbert space. It accompanies the evolution of any system in Hilbert space subjected to noise. 
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700 1 |a Berger  |D Stefan  |e joint author 
700 1 |a Pechal  |D Marek  |e joint author 
700 1 |a Kurpiers  |D Philipp  |e joint author 
700 1 |a Abdumalikov  |D Abdufarrukh A.  |e joint author 
700 1 |a Eichler  |D Christopher  |e joint author 
700 1 |a Mlynek  |D Jonas A.  |e joint author 
700 1 |a Shnirman  |D Alexander G.  |e joint author 
700 1 |a Gefen  |D Yuval  |e joint author 
700 1 |a Wallraff  |D Andreas  |e joint author 
700 1 |a Filipp  |D Stefan  |e joint author 
773 0 |t Nature Communications  |d London : Nature Publishing Group  |g 6, p. 8757  |x 2041-1723 
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950 |B ETHRESEARCH  |P 700  |E 1-  |a Berger  |D Stefan  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Pechal  |D Marek  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Kurpiers  |D Philipp  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Abdumalikov  |D Abdufarrukh A.  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Eichler  |D Christopher  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Mlynek  |D Jonas A.  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Shnirman  |D Alexander G.  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Gefen  |D Yuval  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Wallraff  |D Andreas  |e joint author 
950 |B ETHRESEARCH  |P 700  |E 1-  |a Filipp  |D Stefan  |e joint author 
950 |B ETHRESEARCH  |P 773  |E 0-  |t Nature Communications  |d London : Nature Publishing Group  |g 6, p. 8757  |x 2041-1723 
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