Daniel Setiawan
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Daniel Setiawan has a total of 14 co-authors. Here are the top co-authors by number of shared publications:
- Akshay A. Murthy
Fermi National Accelerator Laboratory
2 shared publications - Alexander Romanenko
Fermi National Accelerator Laboratory
2 shared publications - Anna Grassellino
Superconducting Quantum Materials and Systems Center (SQMS) Division Fermi National Accelerator Laboratory 60510 Batavia IL USA
2 shared publications - Cameron J. Kopas
Rigetti Computing 3 , Berkeley, California 94710
2 shared publications - Ella Lachman
Rigetti Computing 3 , Berkeley, California 94710
2 shared publications - Jayss Marshall
Rigetti Computing, Berkeley, CA 94710, USA
2 shared publications
Latest Publications
- Open Access
Probing Non-Equilibrium Pair-Breaking and Quasiparticle Dynamics in Nb Superconducting Resonators Under Magnetic Fields
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.
Open AccessProbing Non-Equilibrium Pair-Breaking and Quasiparticle Dynamics in Nb Superconducting Resonators Under Magnetic Fields
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.
- Open Access
- 19 November 2024
- Published by MDPI AG in Preprints.org
Probing Non-Equilibrium Pair Breaking and Quasiparticle Dynamics in Nb Superconducting Resonators under Magnetic Fields
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 cavities, as well as various Nb resonator films from transomon qubits. Using ultrafast pump-probe spectroscopy in the regime of minimal condensate depletion, 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 various Nb samples. Particularly, 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.
- 19 November 2024
- Published by MDPI AG in Preprints.org
Open AccessProbing Non-Equilibrium Pair Breaking and Quasiparticle Dynamics in Nb Superconducting Resonators under Magnetic Fields
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 cavities, as well as various Nb resonator films from transomon qubits. Using ultrafast pump-probe spectroscopy in the regime of minimal condensate depletion, 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 various Nb samples. Particularly, 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.