5 papers
Tomography in the presence of stray inter-qubit coupling
Tanay Roy, Ziqian Li, Eliot Kapit +1
Tomography is an indispensable part of quantum computation as it enables diagnosis of a quantum process through state reconstruction. Existing tomographic protocols are based on de…
Universal fast flux control of a coherent, low-frequency qubit
Helin Zhang, Srivatsan Chakram, Tanay Roy +6
The \textit{heavy-fluxonium} circuit is a promising building block for superconducting quantum processors due to its long relaxation and dephasing time at the half-flux frustration…
Engineering Cross Resonance Interaction in Multi-modal Quantum Circuits
Sumeru Hazra, Kishor V. Salunkhe, Anirban Bhattacharjee +5
Existing scalable superconducting quantum processors have only nearest-neighbor coupling. This leads to reduced circuit depth, requiring large series of gates to perform an arbitra…
Multiplexed readout of four qubits in 3D cQED architecture using broadband JPA
Suman Kundu, Nicolas Gheeraert, Sumeru Hazra +4
We propose and demonstrate a frequency-multiplexed readout scheme in 3D cQED architecture. We use four transmon qubits coupled to individual rectangular cavities which are aperture…
A programmable three-qubit superconducting processor with all-to-all connectivity
Tanay Roy, Sumeru Hazra, Suman Kundu +3
Superconducting circuits are at the forefront of quantum computing technology because of the unparalleled combination of good coherence, fast gates and flexibility in design parame…