Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator
Decoherence of a charge qubit is usually credited to charge noise in the environment. Here we show that charge noise may not be the limiting factor for the qubit coherence. To this end, we study coherence properties of a crystal-phase defined semiconductor nanowire double quantum dot (DQD) charge qu...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-11-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.043134 |
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| _version_ | 1846167676195438592 |
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| author | Antti Ranni Subhomoy Haldar Harald Havir Sebastian Lehmann Pasquale Scarlino Andreas Baumgartner Christian Schönenberger Claes Thelander Kimberly A. Dick Patrick P. Potts Ville F. Maisi |
| author_facet | Antti Ranni Subhomoy Haldar Harald Havir Sebastian Lehmann Pasquale Scarlino Andreas Baumgartner Christian Schönenberger Claes Thelander Kimberly A. Dick Patrick P. Potts Ville F. Maisi |
| author_sort | Antti Ranni |
| collection | DOAJ |
| description | Decoherence of a charge qubit is usually credited to charge noise in the environment. Here we show that charge noise may not be the limiting factor for the qubit coherence. To this end, we study coherence properties of a crystal-phase defined semiconductor nanowire double quantum dot (DQD) charge qubit strongly coupled to a high-impedance resonator using radio-frequency reflectometry. Response of this hybrid system is measured both at a charge noise sensitive operation point (with finite DQD detuning) and at an insensitive point (so-called sweet spot with zero detuning). A theoretical model based on the Jaynes-Cummings Hamiltonian matches the experimental results well and yields only a 10% difference in decoherence rates between the two cases, despite that the sensitivity to detuning charge noise differs by a factor of 5. Therefore, the charge noise is not limiting the coherence in this experiment with this type of semiconducting nanowire qubits. |
| format | Article |
| id | doaj-art-6eb028bc961c44f58dba7941781cd93d |
| institution | Kabale University |
| issn | 2643-1564 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-6eb028bc961c44f58dba7941781cd93d2024-11-14T15:17:05ZengAmerican Physical SocietyPhysical Review Research2643-15642024-11-016404313410.1103/PhysRevResearch.6.043134Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonatorAntti RanniSubhomoy HaldarHarald HavirSebastian LehmannPasquale ScarlinoAndreas BaumgartnerChristian SchönenbergerClaes ThelanderKimberly A. DickPatrick P. PottsVille F. MaisiDecoherence of a charge qubit is usually credited to charge noise in the environment. Here we show that charge noise may not be the limiting factor for the qubit coherence. To this end, we study coherence properties of a crystal-phase defined semiconductor nanowire double quantum dot (DQD) charge qubit strongly coupled to a high-impedance resonator using radio-frequency reflectometry. Response of this hybrid system is measured both at a charge noise sensitive operation point (with finite DQD detuning) and at an insensitive point (so-called sweet spot with zero detuning). A theoretical model based on the Jaynes-Cummings Hamiltonian matches the experimental results well and yields only a 10% difference in decoherence rates between the two cases, despite that the sensitivity to detuning charge noise differs by a factor of 5. Therefore, the charge noise is not limiting the coherence in this experiment with this type of semiconducting nanowire qubits.http://doi.org/10.1103/PhysRevResearch.6.043134 |
| spellingShingle | Antti Ranni Subhomoy Haldar Harald Havir Sebastian Lehmann Pasquale Scarlino Andreas Baumgartner Christian Schönenberger Claes Thelander Kimberly A. Dick Patrick P. Potts Ville F. Maisi Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator Physical Review Research |
| title | Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator |
| title_full | Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator |
| title_fullStr | Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator |
| title_full_unstemmed | Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator |
| title_short | Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator |
| title_sort | decoherence in a crystal phase defined double quantum dot charge qubit strongly coupled to a high impedance resonator |
| url | http://doi.org/10.1103/PhysRevResearch.6.043134 |
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