A5012805731- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Photonic and Optical Devices
- Physics of Superconductivity and Magnetism
- Mechanical and Optical Resonators
- Optical Network Technologies
- Advanced Electrical Measurement Techniques
- Advanced Database Systems and Queries
- Quantum Computing Algorithms and Architecture
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Thermoelectric Materials and Devices
- Strong Light-Matter Interactions
- Data Stream Mining Techniques
- Semiconductor Lasers and Optical Devices
- Gyrotron and Vacuum Electronics Research
- Advanced Fiber Laser Technologies
- Cloud Computing and Resource Management
- Advanced Thermodynamics and Statistical Mechanics
- Nonlinear Dynamics and Pattern Formation
- Superconducting and THz Device Technology
- Thermal properties of materials
- Semiconductor Quantum Structures and Devices
Chalmers University of Technology
2019-2024
We report on the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use superconducting nonlinear asymmetric inductive element (SNAIL) loops, biased with dc magnetic flux. In addition, equip device dispersion engineering features to create stopband at second harmonic pump and suppress propagation higher harmonics otherwise degrade amplification. With chain 440 SNAILs, provides up 20 dB gain 3-dB...
We investigate the peripheral circuits required to enable ideal performance for a high-gain traveling-wave parametric amplifier (TWPA) based on three-wave mixing . By embedding TWPA in network of superconducting diplexers, hybrid couplers, and impedance matching networks, can deliver high stable gain with near-quantum-limited noise performance, suppressed ripples, while eliminating reflections signal, idler pump as well transmission all unwanted tones. also demonstrate configuration where...
Abstract We demonstrate an on-demand source of microwave single photons with 71–99% intrinsic quantum efficiency. The is narrowband (300 kHz) and tuneable over a 600 MHz range around 5.2 GHz. Such device important element in numerous technologies applications. consists superconducting transmon qubit coupled to the open end transmission line. A π -pulse excites qubit, which subsequently rapidly emits photon into cancellation pulse then suppresses reflected by 33.5 dB, resulting 0.005 leaking...
We extend the theory for a Josephson-junction traveling-wave parametric amplifier (TWPA) operating in three-wave-mixing regime and we propose scheme achieving high gain. The continuous three-mode model [P.K. Tien, J. Appl. Phys. 29, 1347 (1958)] is, on one hand, extended to describe discrete chain of Josephson junctions at frequencies close spectral cutoff where there is no up-conversion. On other also develop multimode small frequency limit dispersion linear. find that both cases gain...
We characterise a small footprint travelling-wave parametric amplifier (TWPA). The TWPA is built with magnetically flux-tunable superconducting nonlinear asymmetric inductive elements (SNAILs) and parallel-plate capacitors. It implements three-wave mixing (3WM) resonant phase matching (RPM), cutoff frequency for high gain per unitcell impedance networks large bandwidth matching. device has 200 unitcells physical of only 1.1 mm^2, yet demonstrates an average 19 dB over 3 GHz bandwidth,...
Predicting the performance of traveling-wave parametric amplifiers (TWPAs) based on nonlinear elements like superconducting Josephson junctions (JJs) is vital for qubit read-out in quantum computers. The purpose this article twofold: (a) to demonstrate how inductors combinations JJs can be modeled commercial circuit simulators, and (b) show harmonic balance (HB) used reliable prediction amplifier e.g., gain pump power conversion. Experimental characterization two types TWPA architectures...
We investigate the required peripheral circuits to enable ideal performance for a high-gain travelling-wave parametric amplifier (TWPA) based on three-wave mixing (3WM). By embedding TWPA in network of superconducting diplexers, hybrid couplers and impedance matching networks, can deliver high stable gain with near-quantum-limited noise performance, suppressed ripples, while eliminating reflections signal, idler pump as well transmission all unwanted tones. also demonstrate configuration...
Streaming applications are used for analysing large volumes of continuous data. Achieving efficiency and effectiveness in data streaming imply challenges that gen all the more important when different parties (i) define applications' semantics, (ii) choose stream Processing Engine (SPE) to use, (iii) provide processing infrastructure (e.g., cloud or fog), one party's decisions how deploy trigger adaptive reconfigurations) depend on information held by a distinct (and possibly hard retrieve)....
We extend the theory for a Josephson junction travelling wave parametric amplifier (TWPA) operating in three-wave mixing regime and we propose scheme achieving high gain. The continuous three-mode model [P. K. Tien, J. Appl. Phys. 29, 1347 (1958)] is on one hand extended to describe discrete chain of junctions at frequencies close spectral cutoff where there no up-conversion. On other hand, also develop multimode low-frequency region frequency dispersion linear. find that both cases gain...
We report the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use superconducting nonlinear asymmetric inductive element (SNAIL) loops, biased with dc magnetic flux. In addition, equip device dispersion engineering features to create stop-band at second harmonic pump and suppress propagation higher harmonics otherwise degrade amplification. With chain 440 SNAILs, provides up 20 dB gain 3-dB...