aqora

Transmon Qubit Designs Toward Giga‐Scale Integration

Shi‐Li Zhang, Yao Yao, Ngan Hoang Pham +1 more

SmartSysJan 28, 20261 citation

Tunable coupling between fixed-frequency superconducting transmon qubits, Part I: Concept, design, and prospects

Stefan Filipp, David C. McKay, Easwar Magesan +3 more

Bulletin of the American Physical SocietyMar 15, 20160 citations

Weakly-tunable transmon qubits in a multi-qubit architecture

Jared Hertzberg, Nicholas T. Bronn, Antonio D. Corcoles +7 more

Bulletin of the American Physical SocietyMar 16, 20160 citations

Concentric transmon qubit featuring fast tunability and site-selective Z coupling

Jochen Braumüller, Martin Sandberg, Michael R. Vissers +10 more

We present a planar qubit design based on a superconducting circuit that we call concentric transmon. While employing a straightforward fabrication process using Al evaporation and lift-off lithography, we observe qubit lifetimes and coherence times in the order of 10us. We systematically characterize loss channels such as incoherent dielectric loss, Purcell decay and radiative losses. The implementation of a gradiometric SQUID loop allows for a fast tuning of the qubit transition frequency and therefore for full tomographic control of the quantum circuit. Due to the large loop size, the presented qubit architecture features a strongly increased magnetic dipole moment as compared to conventional transmon designs. This renders the concentric transmon a promising candidate to establish a site-selective passive direct Z coupling between neighboring qubits, being a pending quest in the field of quantum simulation.We present a planar qubit design based on a superconducting circuit that we call concentric transmon. While employing a straightforward fabrication process using Al evaporation and lift-off lithography, we observe qubit lifetimes and coherence times in the order of 10us. We systematically characterize loss channels such as incoherent dielectric loss, Purcell decay and radiative losses. The implementation of a gradiometric SQUID loop allows for a fast tuning of the qubit transition frequency and therefore for full tomographic control of the quantum circuit. Due to the large loop size, the presented qubit architecture features a strongly increased magnetic dipole moment as compared to conventional transmon designs. This renders the concentric transmon a promising candidate to establish a site-selective passive direct Z coupling between neighboring qubits, being a pending quest in the field of quantum simulation.

Sep 26, 20150 citations

Optimization of Transmon Qubit Fabrication

Josephine Chang, Mary Beth Rothwell, George Keefe

Bulletin of the American Physical SocietyMar 18, 20130 citations

Concentric transmon qubit featuring fast tunability and an anisotropic magnetic dipole moment

Jochen Braumüller, Martin Sandberg, Michael R. Vissers +10 more

We present a planar qubit design based on a superconducting circuit that we call concentric transmon. While employing a straightforward fabrication process using Al evaporation and lift-off lithography, we observe qubit lifetimes and coherence times in the order of 10 μs. We systematically characterize loss channels such as incoherent dielectric loss, Purcell decay and radiative losses. The implementation of a gradiometric SQUID loop allows for a fast tuning of the qubit transition frequency and therefore for full tomographic control of the quantum circuit. Due to the large loop size, the presented qubit architecture features a strongly increased magnetic dipole moment as compared to conventional transmon designs. This renders the concentric transmon a promising candidate to establish a site-selective passive direct Ẑ coupling between neighboring qubits, being a pending quest in the field of quantum simulation.We present a planar qubit design based on a superconducting circuit that we call concentric transmon. While employing a straightforward fabrication process using Al evaporation and lift-off lithography, we observe qubit lifetimes and coherence times in the order of 10 μs. We systematically characterize loss channels such as incoherent dielectric loss, Purcell decay and radiative losses. The implementation of a gradiometric SQUID loop allows for a fast tuning of the qubit transition frequency and therefore for full tomographic control of the quantum circuit. Due to the large loop size, the presented qubit architecture features a strongly increased magnetic dipole moment as compared to conventional transmon designs. This renders the concentric transmon a promising candidate to establish a site-selective passive direct Ẑ coupling between neighboring qubits, being a pending quest in the field of quantum simulation.

arXiv:1509.08014Applied Physics LettersJan 18, 201669 citations

Systematic Design of Tuned Transmon Qubits

Related papers

Systematic Design of Tuned Transmon Qubits

Related papers