96 citations · 480 across the 26 of their papers we have counts for
27 papers
Effects of Josephson Junction Non-idealities on Adiabatic Quantum Flux Parametron Circuits
Daryoush Shiri, Likai Yang, Mohamed A. Hassan +2
Adiabatic quantum flux parametron (AQFP) gate is a promising approach to scale up the cryogenic microwave electronics for superconducting qubit multiplexed control. However, the pe…
Impact of Pump Phase-Noise on Josephson Traveling-Wave Parametric Amplifiers
Daryoush Shiri, Likai Yang, Saesun Kim +3
Superconducting traveling-wave parametric amplifiers (TWPAs) are essential elements for enhancing the signal-to-noise ratio (SNR) and thus the read-out fidelity of superconducting…
Mitigating transients in flux-control signals in a superconducting quantum processor
Anuj Aggarwal, Jorge Fernández-Pendás, Tahereh Abad +12
Flux-tunable qubits and couplers are common components in superconducting quantum processors. However, dynamically controlling these elements via current pulses poses challenges du…
Fast unconditional reset and leakage reduction in fixed-frequency transmon qubits
Liangyu Chen, Simon Pettersson Fors, Zixian Yan +24
The realization of fault-tolerant quantum computing requires the execution of quantum error-correction (QEC) schemes, to mitigate the fragile nature of qubits. In this context, to…
Low-Temperature Electron Transport in [110] and [100] Silicon Nanowires: A DFT - Monte Carlo study
Daryoush Shiri, Reza Nekovei, Amit Verma
The effects of very low temperature on the electron transport in a [110] and [100] axially aligned unstrained silicon nanowires (SiNWs) are investigated. A combination of semi-empi…
A small footprint travelling-wave parametric amplifier with a high Signal-to-Noise Ratio improvement in a wide band
Hampus Renberg Nilsson, Liangyu Chen, Giovanna Tancredi +6
We characterise a small footprint travelling-wave parametric amplifier (TWPA). The TWPA is built with magnetically flux-tunable superconducting nonlinear asymmetric inductive eleme…
Signal crosstalk in a flip-chip quantum processor
Sandoko Kosen, Hang-Xi Li, Marcus Rommel +15
Quantum processors require a signal-delivery architecture with high addressability (low crosstalk) to ensure high performance already at the scale of dozens of qubits. Signal cross…
Peripheral circuits for ideal performance of a travelling-wave parametric amplifier
Hampus Renberg Nilsson, Daryoush Shiri, Robert Rehammar +2
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 embeddi…
Modeling and Harmonic Balance Analysis of Parametric Amplifiers for Qubit Read-out
Daryoush Shiri, Hampus Renberg Nilsson, Pavan Telluri +4
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…
Experimentally verified, fast analytic and numerical design of superconducting resonators in flip-chip architectures
Hang-Xi Li, Daryoush Shiri, Sandoko Kosen +10
In superconducting quantum processors, the predictability of device parameters is of increasing importance as many labs scale up their systems to larger sizes in a 3D-integrated ar…
Extracting the Dispersion of Periodic Lossless LC Circuits Using White Noise
Daryoush Shiri, Andreas Isacsson
The spectral energy density (SED) method is used to obtain the phonon dispersion of materials in molecular dynamics codes, e.g., LAMMPS. We show how the electric analog of the SED…
Three-wave mixing traveling-wave parametric amplifier with periodic variation of the circuit parameters
Anita Fadavi Roudsari, Daryoush Shiri, Hampus Renberg Nilsson +8
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 the superconduc…
A high gain travelling-wave parametric amplifier based on three-wave mixing
Hampus Renberg Nilsson, Anita Fadavi Roudsari, Daryoush Shiri +2
We extend the theory for a Josephson junction travelling wave parametric amplifier (TWPA) operating in the three-wave mixing regime and we propose a scheme for achieving high gain.…
Qubit-compatible substrates with superconducting through-silicon vias
K. Grigoras, N. Yurttagül, J. -P. Kaikkonen +21
We fabricate and characterize superconducting through-silicon vias and electrodes suitable for superconducting quantum processors. We measure internal quality factors of a million…
Building Blocks of a Flip-Chip Integrated Superconducting Quantum Processor
Sandoko Kosen, Hang-Xi Li, Marcus Rommel +24
We have integrated single and coupled superconducting transmon qubits into flip-chip modules. Each module consists of two chips -- one quantum chip and one control chip -- that are…
Improved success probability with greater circuit depth for the quantum approximate optimization algorithm
Andreas Bengtsson, Pontus Vikstål, Christopher Warren +12
Present-day, noisy, small or intermediate-scale quantum processors---although far from fault-tolerant---support the execution of heuristic quantum algorithms, which might enable a…
Heat-to-Mechanical Energy Conversion in Graphene: Manifestation of Umklapp Enhancement with Strain
Daryoush Shiri, Andreas Isacsson
Conversion of heat-flux, from a steady state temperature difference, to mechanical vibration is demonstrated in graphene nanoribbons using direct non-equilibrium molecular dynamics…
Optical Transitions and Localized Edge States in Skewed Phosphorene Nanoribbons
Sima Shekarforoush, Farhad Khoeini, Daryoush Shiri
Using the Tight Binding (TB) parameters extracted from Density Functional Theory (DFT) and Recursive Green's Function method, it is shown that skewed-zigzag black phosphorous (phos…
Nonlinear Optical Susceptibilities and Linear Absorption in Phosphorene Nanoribbons: Ab initio study
Sima Shekarforoush, Daryoush Shiri, Farhad Khoeini
Using Density Functional Theory (DFT) method we compute linear optical absorption spectra and nonlinear optical susceptibilities of hydrogen passivated armchair and zigzag Phosphor…
Gunn Effect in Silicon Nanowires: Charge Transport under High Electric Field
Daryoush Shiri, Amit Verma, Reza Nekovei +3
Gunn (or Gunn-Hilsum) Effect and its associated negative differential resistivity (NDR) emanates from transfer of electrons between two different energy bands in a semiconductor. I…
Photoconductive response of strained silicon nanowires: A Monte Carlo study
Daryoush Shiri, Amit Verma, Mahmoud M. Khader
Using Ensemble Monte Carlo simulations the photocurrent in a 500nm long strained [110] silicon nanowire with diameter of 3.1 nm is investigated. It was observed that a phototransis…
Ab initio Study of Nonlinear Optical Susceptibilities in Silicon Nanowires
Daryoush Shiri
Using Time Independent Density Functional Theory (TIDFT) it is shown that the 2nd order optical susceptibilities of narrow (1nm-2nm) Silicon Nanowires (SiNW) are enhanced due to su…
Reversible Modulation of Spontaneous Emission by Strain in Silicon Nanowires
Daryoush Shiri, Amit Verma, C. R. Selvakumar +1
We computationally study the effect of uniaxial strain in modulating the spontaneous emission of photons in silicon nanowires. Our main finding is that a one to two orders of magni…
Dynamic in situ Control of Heat Rectification in Graphene Nano Ribbons using Electric Field-induced Strain
Daryoush Shiri, Andreas Isacsson
An increasing number of papers propose routes to implement thermal counterparts of electronic rectification. These schemes are mainly based on combinations of crystal anharmonicity…