Advanced Concepts in Josephson Junction Reflection Amplifiers

Abstract

Low-noise amplification atmicrowave frequencies has become increasingly important for the research related to superconducting qubits and nanoelectromechanical systems. The fundamental limit of added noise by a phase-preserving amplifier is the standard quantum limit, often expressed as noise temperature $T_q=\hslash \omega /2k_B$. Towards the goal of the quantum limit, we have developed an amplifier based on intrinsic negative resistance of a selectively damped Josephson junction. Here we present measurement results on previously proposed wide-band microwave amplification and discuss the challenges for improvements on the existing designs. We have also studied flux-pumped metamaterial-based parametric amplifiers, whose operating frequency can be widely tuned by external DC-flux, and demonstrate operation at $2\omega$ pumping, in contrast to the typical metamaterial amplifiers pumped via signal lines at $\omega$.

9 pages, 6 figures

References in corpus (10)

• Introduction to Quantum Noise, Measurement and Amplification
• A SQUID-based microwave cavity search for dark-matter axions
• Amplification and squeezing of quantum noise with a tunable Josephson metamaterial
• Nanomechanical motion measured with precision beyond the standard quantum limit
• Phase preserving amplification near the quantum limit with a Josephson Ring Modulator
• Dynamical Casimir effect in a Josephson metamaterial
• A widely tunable parametric amplifier based on a SQUID array resonator
• Dispersive magnetometry with a quantum limited SQUID parametric amplifier
• Input Impedance and Gain of a Gigahertz Amplifier Using a DC SQUID in a Quarter Wave Resonator
• Dielectric losses in multi-layer Josephson junction qubits

Cited by in corpus (10)

• Quantum systems under frequency modulation
• Coherence and multimode correlations from vacuum fluctuations in a microwave superconducting cavity
• Quantum limited amplification from inelastic Cooper pair tunneling
• Entanglement, coherence, and redistribution of quantum resources in double spontaneous downconversion processes
• Broadband lumped-element Josephson parametric amplifier with single-step lithography
• Theory of noiseless phase-mixing amplification in a cavity optomechanical system
• Phase diffusion and the small-noise approximation in linear amplifiers: Limitations and beyond
• Optimal gain sensing of quantum-limited phase-insensitive amplifiers
• Implementation of traveling odd Schr$\ddot{o}$dinger cat states in circuit-QED
• Phase diffusion and noise temperature of a microwave amplifier based on single unshunted Josephson junction