Broadband Sample Holder for Microwave Spectroscopy of Superconducting Qubits

Abstract

We present a practical design and implementation of a broadband sample holder suitable for microwave experiments with superconducting integrated circuits at millikelvin temperatures. Proposed design can be easily integrated in standard dilution cryostats, has flat pass band response in a frequency range from 0 to 32 GHz, allowing the RF testing of the samples with substrate size up to 4x4 mm. The parasitic higher modes interference in the holder structure is analyzed and prevented via design considerations. The developed setup can be used for characterization of superconducting parametric amplifiers, bolometers and qubits. We tested the designed sample holder by characterizing of a superconducting flux qubit at 20 mK temperature.

arXiv comment11 pages, 7 figures

References in corpus (11)

• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• Coupling Superconducting Qubits via a Cavity Bus
• Preparation and Measurement of Three-Qubit Entanglement in a Superconducting Circuit
• An RF-Driven Josephson Bifurcation Amplifier for Quantum Measurements
• A widely tunable parametric amplifier based on a SQUID array resonator
• NIKA: A millimeter-wave kinetic inductance camera
• Frequency Division Multiplexing Readout and Simultaneous Manipulation of an Array of Flux Qubits
• Directional amplification with a Josephson circuit
• Radio-Frequency Method for Investigation of Quantum Properties of Superconducting Structures
• Spectroscopy of a Qubit Array via a Single Transmission Line
• Parametric amplification by coupled flux qubits

Cited by in corpus (4)

• Triangle geometry of the qubit state in the probability representation expressed in terms of the triada of Malevich's Squares
• On Testing Entropic Inequalities for Superconducting Qudit
• Extensible 3D architecture for superconducting quantum computing
• ${}^4$He sample probe for combined microwave and dc transport measurements