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A Fast Tunable 3D-Transmon Architecture for Superconducting Qubit-Based Hybrid Devices

Sourav Majumder, Tanmoy Bera, Ramya Suresh +1 more

arXiv:2204.00240Journal of Low Temperature PhysicsMar 25, 20225 citations

Construction of controlled-NOT gate based on microwave-activated phase (MAP) gate in two transmon system

Taewan Noh, Gwanyeol Park, Soon-Gul Lee +2 more

We experimentally constructed an all-microwave scheme for the controlled-NOT (cNOT) gate between two superconducting transmon qubits in a three dimensional cavity. Our cNOT gate is based on the microwave-activated phase (MAP) gate, which requires an additional procedure to compensate the accumulated phases during the operation of the MAP gate. We applied Z-axis phase gates using microwave hyperbolic secant pulse on both qubits with adequate rotation angles systematically calibrated by separate measurements. We evaluated the gate performance of the constructed cNOT gate by performing two-qubit quantum process tomography (QPT). Finally, we present the experimental implementation of the Deutsch-Jozsa algorithm using the cNOT gate.We experimentally constructed an all-microwave scheme for the controlled-NOT (cNOT) gate between two superconducting transmon qubits in a three dimensional cavity. Our cNOT gate is based on the microwave-activated phase (MAP) gate, which requires an additional procedure to compensate the accumulated phases during the operation of the MAP gate. We applied Z-axis phase gates using microwave hyperbolic secant pulse on both qubits with adequate rotation angles systematically calibrated by separate measurements. We evaluated the gate performance of the constructed cNOT gate by performing two-qubit quantum process tomography (QPT). Finally, we present the experimental implementation of the Deutsch-Jozsa algorithm using the cNOT gate.

arXiv:1803.04105Scientific ReportsSep 5, 20188 citations

Tunable phase gate for microwave photon qubits

Sakari Saarenpää

Nov 30, 20140 citations

All-microwave CNOT gate between two transmon qubits

Shavindra Premaratne, Jen-Hao Yeh, F. C. Wellstood +1 more

Bulletin of the American Physical SocietyMar 7, 20180 citations

Implementation of all-microwave entanglement schemes in 3D transmon two qubit system

Yonuk Chong, Taewan Noh, Gwanyeol Park +5 more

We implemented all-microwave two qubit entanglement scheme via Stark shift-induced controlled phase gate, as suggested by J. Chow et al., [1]. Our system consists of two superconducting transmon qubits, one of which is a tunable-frequency qubit and the other is a fixed-frequency qubit, embedded in a three dimensional copper cavity. As we align higher quantum states outside the computational states, i.e., \\textbar 12\\textgreater and \\textbar 03\\textgreater , we could achieve controlled phase gate by applying a microwave tone which induces the Stark shift. The gate time can be controlled depending on how close we align the levels. We will present our results on the estimation of the fidelity of generated Bell states with tomographic reconstruction of the two-qubit states as a function of the gate time. [1] J. Chow et al., New J. Phys. 15, 115012 (2013).We implemented all-microwave two qubit entanglement scheme via Stark shift-induced controlled phase gate, as suggested by J. Chow et al., [1]. Our system consists of two superconducting transmon qubits, one of which is a tunable-frequency qubit and the other is a fixed-frequency qubit, embedded in a three dimensional copper cavity. As we align higher quantum states outside the computational states, i.e., \\textbar 12\\textgreater and \\textbar 03\\textgreater , we could achieve controlled phase gate by applying a microwave tone which induces the Stark shift. The gate time can be controlled depending on how close we align the levels. We will present our results on the estimation of the fidelity of generated Bell states with tomographic reconstruction of the two-qubit states as a function of the gate time. [1] J. Chow et al., New J. Phys. 15, 115012 (2013).

Bulletin of the American Physical SocietyMar 14, 20170 citations

Microwave-based CPHASE Gates for Transmon Qubits

George S. Barron, F. A. Calderon-Vargas, Junling Long +2 more

Bulletin of the American Physical SocietyMar 3, 20190 citations

Detailed Study of microwave-activated c-Phase (MAP) gate in tunable 3D transmon two qubit system

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