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arXiv:2103.01225v3 [quant-ph] 10 Nov 2023

In addition, a new current injection circuit branch using H-bridge structure is designed to recycle the residual capacitor voltage from the previous fault stage to trigger …

[2203.09592] Compact superconducting microwave resonators based on Al-AlOx-Al capacitor …

View a PDF of the paper titled Compact superconducting microwave resonators based on Al-AlOx-Al capacitor, by Julia Zotova and 6 other authors View PDF TeX Source

Supercapacitance and superinductance of TiN and NbTiN films in the vicinity of superconductor-to-insulator transition …

The impedance crosses over from capacitive to inductive behavior as films go across the transition. We investigate the low-temperature complex impedance of disordered insulating thin TiN and NbTiN ...

arXiv:2103.01225v3 [quant-ph] 10 Nov 2023

3 couplers and multibody interactions. In Section XII we present an overview of the methods and give a perspective on where to go from here. To students and researchers entirely new to the field of superconducting qubits, who just want to start ana-lyzing their first

Superconducting quantum computing

Superconducting quantum computing

2.2 CAPACITORS AND SUPERCAPACITORS

In order to avoid resistive losses in the coil, superconducting materials are used to carry the current. Energy is recovered by extracting the current from the coil. These two …

Superconducting circuit protected by two-Cooper-pair …

We present a protected superconducting qubit based on an effective circuit element that only allows pairs of Cooper pairs to tunnel.

A Brief Introduction to Superconducting Charge Qubits

A Cooper pair box can be used to build a type of superconducting qubit known as a charge qubit where the state of the qubit is determined by the number of Cooper pairs that have …

Superconducting Parallel Plate Capacitors with High Kinetic …

Cooper-pair and so all of the electrons flow without any resistance. Superconducting Parallel Plate Capacitors Superconducting devices are electronic devices that utilize the zero-resistance properties of superconductors. In general, these devices are used for

The Quantum Capacitor Detector: A Single Cooper Pair Box Based Readout for Pair …

The detector we propose is an example of a superconducting pair-breaking detector. Photons with energy hν > 2Δ, where is the superconducting gap, can break Cooper Δ pairs (weakly bound pairs of electrons which are …

Superconducting Parallel Plate Capacitors with High Kinetic …

Parallel Plate Capacitors. Process for creating vias to galvanically connect two planes. Highlights of the Fall Quarter: Total Expenditure: $5632.01. Nb deposition. Selective Nb …

Superconducting Parallel Plate Capacitors with High Kinetic …

Josephson parametric amplifiers (JPAs) have become a crucial component of superconducting qubit measurement circuitry, enabling recent studies of quantum …

Tunable capacitor for superconducting qubits using an …

We propose a voltage-controlled capacitive coupling element between neighboring superconducting qubits using a III–V semiconductor 2DEG in an …

Introduction to Superconducting Quantum Computing …

Introduction to Superconducting Quantum Computing Basics

Superconducting nanowires as quantum phase-slip junctions

A phase-slip event in a superconducting nanowire changes the phase difference over the wire by 2π; it is the dual process to Cooper-pair tunnelling in a Josephson junction.

Superconducting Qubits

The charge qubit consists of a dc voltage source and gate capacitor connected to a Josephson junction (Fig. 22.26), forming a superconducting island (also known as a "Cooper pair box") []. Inductance is irrelevant in this circuit.

Superior carrier tuning in ultrathin superconducting materials by …

Ultrathin 2D superconductors are a useful platform for understanding the superconducting mechanism, exploring new quantum physics and searching for new high-temperature superconductors 1,2,3,4 ...

Superconducting electrode capacitor based on double-sided YBCO thin film for wireless power transfer applications …

A high-temperature superconducting (HTS) electrode capacitor (HTS capacitor) has been reported for the first time in the form of a superconductor–insulator–superconductor structure. Double-sided HTS thin film might be inherently suitable for the raw material choice ...

The superconducting quasicharge qubit

A fundamental superconducting qubit is introduced: ''blochnium'' is dual to the transmon, relies on a circuit element called hyperinductance, and its fundamental physical variable is the ...

arXiv:2103.01225v3 [quant-ph] 10 Nov 2023

of superconducting circuits is the fact that microscopic features such as energy spectra, coupling strengths, and ... Such a Josephson junction and capacitor pair is considered a transmonlike qubit, see Section XIA2. An external flux is threading the inductive Ib ...

Superconducting circuit protected by two-Cooper-pair …

Superconducting circuit protected by two-Cooper-pair ...

Material matters in superconducting qubits

This review article is organized as follows: Section 2 will focus on the various aspects of dielectric loss that can impact qubit performance. In Section 3, we describe ways to calculate loss mechanisms within various resonator and qubit designs, followed by the effects pertinent to superconducting metallization and tunneling barriers …

A Brief Introduction to Superconducting Charge Qubits

H= Q^2 2C J 1 2 E J X N jNihN+ 1j+ jN+ 1ihNj In this Hamiltonian the capacitive term accounts for the energy associated with adding Cooper pairs to the superconducting island while the tunneling term accounts for the energy associated with …

2D materials shrink superconducting qubits

With such capacitors, the superconducting transmon qubit is scaled down by orders of magnitude ... which was based on the Cooper-pair box 4, it was realized that charge noise is a dominating ...

Tunable capacitor for superconducting qubits using an …

We propose a voltage-controlled capacitive coupling element between neighboring superconducting qubits using a III–V semiconductor 2DEG in an InAs/InGaAs heterostructure. The capacitance of the coupler tunes as a function of a gate voltage or series of gate voltages applied to the 2DEG, repelling electrons away from the region …

PRX Quantum 2, 040204 (2021)

The analysis of superconducting circuits usually revolves around making efficient two-level quantum systems, also known as qubits, from circuits consisting of capacitors, linear inductors, and a nonlinear inductor also known as a Josephson junction.

Charge qubit

Circuit diagram of a charge qubit circuit. The island (dotted line) is formed by the superconducting electrode between the gate capacitor and the junction capacitance. In quantum computing, a charge qubit (also known as Cooper-pair box) is a qubit whose basis states are charge states (i.e. states which represent the presence or absence of …

Quasiparticle tunneling as a probe of Josephson junction barrier and capacitor material in superconducting …

barrier and capacitor material in superconducting qubits C. Kurter 1, C. E. Murray, R. T. Gordon, B. B. Wymore 1, ... broken Cooper pairs out of the superconducting condensate at low ...

Superconducting Capacitor for Energy Storage?

Perhaps Cooper pairs within a superconductor want to stay paired. For example, if electrons in the surface of the superconductor are feeling a high electric field and want to be ripped from the surface, maybe something about being paired with another electron would compel them to stay within the bulk of the superconductor.

Superconducting quantum bits – Physics World

The charge qubit consists of a small volume of superconductor, known as a Cooper-pair box, that is connected to a weak Josephson junction and driven with a gate voltage, V g, through a capacitor. If V g = e / C g, where C g is the capacitance of the gate, then the classical states in which there are zero (|0>) and one (|1>) extra Cooper pairs in …