Frequency-tuned microwave photon counter based on a superconductive quantum interferometer

Wu, Yue; Soroka, A. A.; Турутанов, О. Г.; Lyakhno, V. Yu.

doi:10.1063/1.5024538

Cited by 13 publications

(7 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Superconducting systems on the basis of nonlinear Josephson circuits with discrete energy spectra allow for the detection of microwave photons and magnons with single-quantum sensitivity. These systems are analogs of a single atom described with a discrete Hamiltonian and allow for efficient electromagnetic coupling between constituents in hybrid systems [501].…”

Section: H Towards Entangled Magnons In Hybrid Quantum Systemsmentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

View full text Add to dashboard Cite

Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of current challenges and the outlook of further development for each research direction.

show abstract

Section: H Towards Entangled Magnons In Hybrid Quantum Systemsmentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Therefore, any variations in the external magnetic flux in the RF SQUID causes a change in the total reactive impedance of the interferometer. In the hysteretic mode [5,7], the parameter β L = 2π • L • I c /Φ 0 > 1 and, with a slow sweep of the external flux φ e (t) with respect to the switching time of the interferometer Ω P ≪ R/L, the dependence of φ on the normalized external flux φ e = 2πΦ e /Φ 0 following from the stationary equation is multi-valued.…”

Section: Rf Squid In Hysteretic Mode β L >mentioning

confidence: 99%

“…In this case, the resonator noise limits the sensitivity of the RF SQUID in the non-hysteretic mode. One can, without much error, estimate this noise from expression (7), and for…”

Section: And T *mentioning

confidence: 99%

See 1 more Smart Citation

An RF SQUID readout for a flux qubit-based microwave single photon counter

Shapovalov¹,

Lyakhno²,

Kalenyuk³

et al. 2023

Supercond. Sci. Technol.

View full text Add to dashboard Cite

An analysis of the measurement of the magnetic flux in superconducting qubits based on RF SQUIDs was carried out with a 800 MHz bandwidth low power consumption cryogenic high-electron-mobility transistor (HEMT) amplifier. The preliminary experimental results obtained at temperatures 2 K and 4 K for RF SQUIDs in hysteretic and in two non-hysteretic regimes with a pump frequency of about $30$~MHz are discussed. Parameters of RF SQUIDs in the hysteretic and non-hysteretic modes are analyzed within the framework of the Resistively and Capacitively Shunted Junction (RCSJ) model for Josephson junctions. Its sensitivity at the temperature of 30 mK and frequency band (speed) are calculated and optimized to read the states of a flux qubit used as single microwave photon counter. It is shown that an RF SQUID, operated in an adiabatic non-hysteretic mode for qubit readout, allows to minimize its back-action effect and the dark count rate. This is owing to the absence of Josephson generation, the small amplitude of the resonator electromagnetic field, and the selection of the pump frequency that does not coincide with the characteristic frequencies of the flux qubit.

show abstract

“…Вєркіна НАН України, 47 Проспект Науки, Харків 61103, Україна 2 Інститут металофізики імені Г.В. Курдюмова НАН України, 03142, Київ, бульвар Академіка Вернадського, 36 3 Київський академічний університет, бульвар Академіка Вернадського, 36, Київ 03142, Україна Наразі квантові схеми для квантової інформатики, комунікаційного та вимірювального обладнання, що містить надпровідні потокові кубіти в планарному дизайні створюються методами квантової інженерії. Для нормальної роботи такі конструкції мають бути охолодженими у рефрижераторах розчинення до температури близько 10 мК.…”

Section: -28unclassified

Cooled ferromagnetic shield as a part hybrid system for isolation of a flux qubit from electromagnetic environment

Turutanov,

Lyakhno,

Boichenko

et al. 2021

The Journal of v. N. Karazin Kharkiv National University, Series "Physics"

View full text Add to dashboard Cite

Currently, circuits for quantum informatics, communications and measuring equipment containing superconducting flux qubits in a planar design are being created by quantum engineering techniques. To function, such structures must be cooled in a refrigerator down to about 10 mK. The flux qubits have linear size of superconducting circuit of some tens of micrometers and are very sensitive to external magnetic fields and their variations. The qubit built in the gradiometer-like design has reduced sensitivity to external uniform magnetic fields, but remains quite sensitive to their variations. To protect the qubit from unwanted external magnetic fields, which include the Earth's field, man-made fields, and residual magnetic fields of the cryostat parts, it is necessary to create efficient magnetic shields. Earlier, we proposed a scheme for a single-photon microwave counter, in which a planar flux qubit in a gradiometer version serves as the receiving element. To let it function properly, a 3-layer hybrid magnetic shield composed of two superconducting and one ferromagnetic cylinders, has been designed for installation in a dilution refrigerator at 10 mK temperature. The effectiveness of such a shield depends on the correct design of all three shells. This paper presents the results of calculation and magnetic measurements of a cylindrical ferromagnetic screen made of low-temperature permalloy Cryoperm 10 in dc and low-frequency alternating magnetic fields. Cryoperm 10 keeps high magnetic permeability at liquid helium temperatures and below. It is shown that this shield is able of reducing the absolute value of the magnetic field and its variations by 55-70 dB. Together with superconducting lead magnetic shields, this design will reduce the absolute value of the field by 70 dB, and the field variation by 200 dB, which will provide the necessary conditions for the operation of a single-photon counter based on a flux qubit.

show abstract

Frequency-tuned microwave photon counter based on a superconductive quantum interferometer

Cited by 13 publications

References 43 publications

Advances in Magnetics Roadmap on Spin-Wave Computing

Advances in Magnetics Roadmap on Spin-Wave Computing

An RF SQUID readout for a flux qubit-based microwave single photon counter

Cooled ferromagnetic shield as a part hybrid system for isolation of a flux qubit from electromagnetic environment

Contact Info

Product

Resources

About