Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits
Noise that exhibits significant temporal and spatial correlations across multiple qubits can be especially harmful to both fault-tolerant quantum computation and quantum-enhanced metrology. However, a complete spectral characterization of the noise environment of even a two-qubit system has not been...
| Main Authors: | , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/135261 |
| _version_ | 1826216550963609600 |
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| author | von Lüpke, Uwe Beaudoin, Félix Norris, Leigh M Sung, Youngkyu Winik, Roni Qiu, Jack Y Kjaergaard, Morten Kim, David Yoder, Jonilyn Gustavsson, Simon Viola, Lorenza Oliver, William D |
| author2 | Massachusetts Institute of Technology. Research Laboratory of Electronics |
| author_facet | Massachusetts Institute of Technology. Research Laboratory of Electronics von Lüpke, Uwe Beaudoin, Félix Norris, Leigh M Sung, Youngkyu Winik, Roni Qiu, Jack Y Kjaergaard, Morten Kim, David Yoder, Jonilyn Gustavsson, Simon Viola, Lorenza Oliver, William D |
| author_sort | von Lüpke, Uwe |
| collection | MIT |
| description | Noise that exhibits significant temporal and spatial correlations across
multiple qubits can be especially harmful to both fault-tolerant quantum
computation and quantum-enhanced metrology. However, a complete spectral
characterization of the noise environment of even a two-qubit system has not
been reported thus far. We propose and experimentally validate a protocol for
two-qubit dephasing noise spectroscopy based on continuous control modulation.
By combining ideas from spin-locking relaxometry with a statistically motivated
robust estimation approach, our protocol allows for the simultaneous
reconstruction of all the single-qubit and two-qubit cross-correlation spectra,
including access to their distinctive non-classical features. Only single-qubit
control manipulations and state-tomography measurements are employed, with no
need for entangled-state preparation or readout of two-qubit observables. While
our experimental validation uses two superconducting qubits coupled to a shared
engineered noise source, our methodology is portable to a variety of
dephasing-dominated qubit architectures. By pushing quantum noise spectroscopy
beyond the single-qubit setting, our work paves the way to characterizing
spatiotemporal correlations in both engineered and naturally occurring noise
environments. |
| first_indexed | 2024-09-23T16:49:26Z |
| format | Article |
| id | mit-1721.1/135261 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:49:26Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1352612023-01-27T21:08:11Z Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits von Lüpke, Uwe Beaudoin, Félix Norris, Leigh M Sung, Youngkyu Winik, Roni Qiu, Jack Y Kjaergaard, Morten Kim, David Yoder, Jonilyn Gustavsson, Simon Viola, Lorenza Oliver, William D Massachusetts Institute of Technology. Research Laboratory of Electronics Massachusetts Institute of Technology. Department of Physics Noise that exhibits significant temporal and spatial correlations across multiple qubits can be especially harmful to both fault-tolerant quantum computation and quantum-enhanced metrology. However, a complete spectral characterization of the noise environment of even a two-qubit system has not been reported thus far. We propose and experimentally validate a protocol for two-qubit dephasing noise spectroscopy based on continuous control modulation. By combining ideas from spin-locking relaxometry with a statistically motivated robust estimation approach, our protocol allows for the simultaneous reconstruction of all the single-qubit and two-qubit cross-correlation spectra, including access to their distinctive non-classical features. Only single-qubit control manipulations and state-tomography measurements are employed, with no need for entangled-state preparation or readout of two-qubit observables. While our experimental validation uses two superconducting qubits coupled to a shared engineered noise source, our methodology is portable to a variety of dephasing-dominated qubit architectures. By pushing quantum noise spectroscopy beyond the single-qubit setting, our work paves the way to characterizing spatiotemporal correlations in both engineered and naturally occurring noise environments. 2021-10-27T20:22:41Z 2021-10-27T20:22:41Z 2020 2021-03-16T15:06:36Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/135261 en 10.1103/PRXQUANTUM.1.010305 PRX Quantum Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Physical Society (APS) APS |
| spellingShingle | von Lüpke, Uwe Beaudoin, Félix Norris, Leigh M Sung, Youngkyu Winik, Roni Qiu, Jack Y Kjaergaard, Morten Kim, David Yoder, Jonilyn Gustavsson, Simon Viola, Lorenza Oliver, William D Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits |
| title | Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits |
| title_full | Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits |
| title_fullStr | Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits |
| title_full_unstemmed | Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits |
| title_short | Two-Qubit Spectroscopy of Spatiotemporally Correlated Quantum Noise in Superconducting Qubits |
| title_sort | two qubit spectroscopy of spatiotemporally correlated quantum noise in superconducting qubits |
| url | https://hdl.handle.net/1721.1/135261 |
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