Evidence map›Paper›PMID 39942235›Full record

ArticleMaterials (Basel, Switzerland)2025

Probing Non-Equilibrium Pair-Breaking and Quasiparticle Dynamics in Nb Superconducting Resonators Under Magnetic Fields.

Joong-Mok Park, Zhi Xiang Chong, Richard H J Kim, Samuel Haeuser, Randy Chan, Akshay A Murthy, Cameron J Kopas, Jayss Marshall, Daniel Setiawan, Ella Lachman and 5 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Materials (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Joong-Mok ParkAmes National Laboratory, U.S. Department of Energy, Ames, IA 50011, USA.ORCID 0000-0001-9936-7512
Zhi Xiang ChongDepartment of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.
Richard H J KimAmes National Laboratory, U.S. Department of Energy, Ames, IA 50011, USA.ORCID 0000-0002-4244-9653
Samuel HaeuserDepartment of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.ORCID 0000-0003-4262-5538
Randy ChanDepartment of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.ORCID 0009-0009-6368-8918
Akshay A MurthyFermi National Accelerator Laboratory, Batavia, IL 60510, USA.
Cameron J KopasRigetti Computing, Berkeley, CA 94710, USA.ORCID 0000-0002-6184-2987
Jayss MarshallRigetti Computing, Berkeley, CA 94710, USA.
Daniel SetiawanRigetti Computing, Berkeley, CA 94710, USA.
Ella LachmanRigetti Computing, Berkeley, CA 94710, USA.ORCID 0000-0001-6967-890X
Joshua Y MutusRigetti Computing, Berkeley, CA 94710, USA.
Kameshwar YadavalliRigetti Computing, Berkeley, CA 94710, USA.
Anna GrassellinoFermi National Accelerator Laboratory, Batavia, IL 60510, USA.
Alex RomanenkoFermi National Accelerator Laboratory, Batavia, IL 60510, USA.
Jigang WangAmes National Laboratory, U.S. Department of Energy, Ames, IA 50011, USA.ORCID 0000-0002-6159-4119

Funding

Department of Energy of USA DE-AC02-07CH11359
6 · The paper itself

Abstract

We conducted a comprehensive study of the non-equilibrium dynamics of Cooper pair breaking, quasiparticle (QP) generation, and relaxation in niobium (Nb) cut from superconducting radio-frequency (SRF) cavities, as well as various Nb resonator films from transmon qubits. Using ultrafast pump-probe spectroscopy, we were able to isolate the superconducting coherence and pair-breaking responses. Our results reveal both similarities and notable differences in the temperature- and magnetic-field-dependent dynamics of the SRF cavity and thin-film resonator samples. Moreover, femtosecond-resolved QP generation and relaxation under an applied magnetic field reveals a clear correlation between non-equilibrium QPs and the quality factor of resonators fabricated by using different deposition methods, such as DC sputtering and high-power impulse magnetron sputtering. These findings highlight the pivotal influence of fabrication techniques on the coherence and performance of Nb-based quantum devices, which are vital for applications in superconducting qubits and high-energy superconducting radio-frequency applications.

Indexed as

non-equilibrium quasiparticlessuperconducting quantum computersuperconducting radio frequency (SRF)superconductivityultrafast pump–probe

Identifiers

PMID39942235
PMCPMC11818216

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.