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Dephasing of a superconducting flux qubit

WebSep 22, 2024 · Flux-tunable qubits are a useful resource for superconducting quantum processors. They can be used to perform cphase gates, facilitate fast reset protocols, avoid qubit-frequency collisions in large processors, and enable certain fast readout schemes. WebJan 26, 2007 · Dephasing of a superconducting flux qubit Phys Rev Lett. 2007 Jan 26;98 (4):047004. doi: 10.1103/PhysRevLett.98.047004. Epub 2007 Jan 23. Authors K Kakuyanagi 1 , T Meno , S Saito , H Nakano , K Semba , H Takayanagi , F Deppe , A Shnirman Affiliation 1 NTT Basic Research Laboratories, NTT Corporation, Kanagawa, 243-0198, …

PRX Quantum 2, 040204 (2024) - Superconducting Circuit …

WebMar 5, 2024 · Encoding a qubit in logical quantum states with wave functions characterized by disjoint support and robust energies can offer simultaneous protection against relaxation and pure dephasing. One of the most promising candidates for such a fully protected superconducting qubit is the 0 – π circuit [Brooks et al., Phys. Rev. A 87, 052306 (2013)]. WebJan 12, 2024 · Superconducting quantum circuits are a strong candidate for quantum computing, 1,2,3 and a convenient platform for quantum optics 4,5,6 and quantum simulation. 7,8 Extensive efforts have been made ... chucksmith.org https://smediamoo.com

Decoherence benchmarking of superconducting qubits

WebJan 25, 2011 · In this work we demonstrate how dynamical-decoupling techniques can moderate the dephasing effects of low-frequency noise on a superconducting qubit with energy-relaxation time T1 = 1/Gamma1 = 12 us. Using the CPMG sequence with up to 200 pi-pulses, we demonstrate a 50-fold improvement in the transverse relaxation time T2 … WebJan 18, 2024 · Here we apply weak in-plane magnetic fields to a capacitively-shunted flux qubit (where the Zeeman splitting of surface spins lies below the device temperature) and study the flux-noise-limited qubit dephasing, revealing previously unexplored trends that may shed light on the dynamics behind the emergent noise. WebThe microscopic of 1 / f magnetic flux noise in superconducting circuits has remained an open question for several decades despite extensive experimental and theoretical investigation. Recent progress in superconducting devices for quantum information has highlighted the need to mitigate sources of qubit decoherence, driving a renewed … desmidts golf course crivitz wisconsin

Decoherence of Flux Qubits due to $1/f$ Flux Noise

Category:Physical Review Letters - Accepted Paper: Evolution of $1/f$ flux …

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Dephasing of a superconducting flux qubit

The Flux Qubit Revisited - arXiv

WebFeb 1, 2007 · In order to gain a better understanding of the origin of decoherence in superconducting flux qubits, we have measured the magnetic field dependence of the characteristic energy relaxation time... WebWe develop and characterize a symmetry-protected superconducting qubit that offers simultaneous exponential suppression of energy decay from charge and flux noises, and dephasing from flux noise ...

Dephasing of a superconducting flux qubit

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WebIn quantum computing, more specifically in superconducting quantum computing, flux qubits (also known as persistent current qubits) are micrometer sized loops of … WebApr 10, 2024 · Here, we report on the construction of transmon-type superconducting qubits based on B i 2 S e 3 topological insulator nanowires (TINWs). The Josephson supercurrent in the qubit is carried through the Andreev bound states in the S-TINW-S junctions (where S denotes the superconductor) and is tunable by varying a magnetic flux.

WebDec 19, 2024 · We show how two-tone modulation of the flux bias, a bichromatic modulation, gives rise to a continuum of dynamical sweet spots where dephasing due to slow flux noise is suppressed to first order for a wide range of … WebJun 26, 2024 · However, a fluctuating qubit frequency necessarily leads to qubit dephasing so it is important to quantify this fluctuation and therefore aid in efforts to …

WebMay 8, 2011 · In our test system, a superconducting (persistent-current) flux qubit 24,25, we carry out noise spectroscopy by dynamical decoupling over the wide frequency range 0.2–20 MHz: the obtained noise ... WebApr 10, 2024 · The Josephson supercurrent in the qubit is carried through the Andreev bound states in the S-TINW-S junctions (where S denotes the superconductor) and is …

WebDec 14, 2024 · 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.

WebWith this thought in mind, we take the superconducting flux qubit coupling mechanism described in Plourde et al. (Phys. Rev. B, 70, 140501(R) (2004)) and extend it to allow approximately 500 MHz ... chuck smith obituaryWebOct 17, 2006 · Abstract. We have investigated decoherence in Josephson-junction flux qubits. Based on the measurements of decoherence at various bias conditions, we discriminate contributions of different noise sources. We present a Gaussian decay function extracted from the echo signal as evidence of dephasing due to 1/f flux noise whose … chuck smith pittsburg ksWebMay 22, 2012 · We report a direct measurement of the low-frequency noise spectrum in a superconducting flux qubit. Our method uses the noise sensitivity of a free-induction Ramsey interference experiment, comprising free evolution in the presence of noise for a fixed period of time followed by single-shot qubit-state measurement. Repeating this … chuck smith of calvary chapelWebrevisit the design and fabrication of the superconducting flux qubit, achieving a planar device with broad frequency tunability, strong anharmonicity, high reproducibility, and relaxation times in excess of 40 P s at its flux -insensitive point. Qubit rel axation times . T. 1. across 22 qubits are consistently matched with a single des ming wayWebThe microscopic of 1 / f magnetic flux noise in superconducting circuits has remained an open question for several decades despite extensive experimental and theoretical … chuck smith philippians 2WebDec 18, 2005 · Dephasing of a superconducting qubit induced by photon noise. We have studied the dephasing of a superconducting flux-qubit coupled to a DC-SQUID based … de smid witgoed service b.vWebApr 25, 2014 · We study a flux qubit made of a superconducting loop interrupted by three Josephson junctions, which is subject to a temperature gradient. We show that the heat … de smit food international co ltd panjiva