21results about "Parametric amplifiers" patented technology

The application discloses a communication method, device and system, and belongs to the technical field of communication. The method comprises the following steps: a target third node receives a first electromagnetic wave signal sent by a first adjacent node, carries out target processing on the first electromagnetic wave signal to obtain a second electromagnetic wave signal, and sends the second electromagnetic wave signal to a second adjacent node. The first node, at least one third node and the second node are sequentially arranged on a cable, the target third node is adjacent to the first adjacent node and the second adjacent node among the nodes, and the target processing comprises processing for carrying out conjugate inversion on the spectrum of the electromagnetic wave signal. The application can solve the problem that nodes cannot effectively communicate, and is used for processing electromagnetic wave signals transmitted on the cable.

A frequency selector for superconducting parametric amplifiers. According to illustrative embodiments, a frequency selector system for superconducting parametric amplifiers may comprise a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency, a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency, and an inverse diplexer electrically connected to the resonator for separating the signal frequency and the idler frequency. In some embodiments, a frequency selector system for superconducting parametric amplifiers, comprising a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency; a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency; and a multiplexer electrically connected to the resonator for separating the signal frequency and the idler frequency.

To provide a superconducting device implemented with a surface acoustic wave resonator and a superconducting microwave resonator that are coupled to a Josephson ring modulator, and methods of applications thereof.SOLUTION: A method comprises: receiving, by a microwave Josephson mixer and from a superconducting surface acoustic wave resonator of a superconducting device, a surface acoustic wave signal that comprises one or more phonons that resonate at a first frequency; receiving, by the microwave Josephson mixer and from a superconducting microwave resonator of the superconducting device, a microwave signal that comprises one or more photons that can resonate at a second frequency; and mixing, by the microwave Josephson mixer, the surface acoustic wave signal and the microwave signal on the basis of a microwave control signal received from a microwave source operatively coupled to the microwave Josephson mixer.SELECTED DRAWING: Figure 8

The present disclosure relates to a frequency multiplexer (1) comprising a first port (2a), a plurality of second ports (2b), each second port (2b) being associated with a specific frequency band and a plurality of signal filtering portions (30, 40, 50, 60) connecting each second port to said first port (2b). Each signal filtering portion (30, 40, 50, 60) is one of a high-pass signal filtering portions (30), low-pass signal filtering portions (40), band-pass signal filtering portions (50), and band-stop signal filtering portion (60). Furthermore, each signal filtering portion (30, 40, 50, 60) comprises chains of superconducting junctions (35, 45, 55, 65).

According to an example aspect of the present invention, there is provided a travelling wave parametric amplifier comprising a transmission line comprising therein a plurality of Josephson elements and a plurality of shunt capacitors, and wherein at least some of the shunt capacitors are dispersive capacitors comprising an open- ended, distributed transmission line.

An apparatus and a method for facilitating a first frequency filtering and a second frequency filtering together with non-reciprocal frequency conversion for electromagnetic isolation.

The invention discloses a superconducting parameter amplifier, a quantum calculation amplification module and a readout circuit, and the amplifier comprises an input end which is used for receiving a quantum signal transmitted by a quantum chip; the filter circuit receives the quantum signal sent by the input end and filters the quantum signal to obtain a first signal; the amplifying circuit is used for receiving the first signal sent by the filter circuit and the input control signal, and amplifying the first signal to obtain a second signal; the amplification circuit sends the second signal to the filter circuit, and filters again to generate a third signal; the output end outputs a third signal; a filter circuit is integrated on the superconducting parameter amplifier, so that a quantum signal is filtered by the filter circuit and then sent to an amplifying circuit, superconducting parameters are amplified to obtain a second signal, and the second signal is output by the filter circuit again, and on the basis of keeping the function of a quantum circuit, the number of components in a temperature zone is reduced, and the space and cooling capacity pressure of the temperature zone is relieved; and more quantum bits can be expanded conveniently.

A variable temperature load (VTL) or noise source including a grounded coplanar waveguide (GCPW) comprising a first metallization patterned on a fused quartz substrate, the first metallization comprising a first end for connecting to a coaxial connector and a second end for connecting to a coplanar waveguide (CPW); the CPW coupled to a 50 ohm termination and comprising a second metallization patterned on a top surface of a crystal quartz substrate; a temperature sensing diode thermally coupled to the crystal quartz substrate and the second metallization; and a heater resistor coupled to the crystal quartz substrate via contact metallization.

[Problem] To provide a magnetic flux-type superconducting quantum circuit element that has a practically tolerable anharmonicity and enables densification by avoiding addition of a shunt capacitor, thereby achieving an increased coherence time, and a superconducting quantum computer in which the element is used. [Solution] The problem is solved by a large-area junction magnetic flux-type superconducting quantum circuit element characterized in that the superconducting quantum circuit element is based on a magnetic flux-type superconducting quantum circuit element which comprises three Josephson junctions for one loop and into which an α junction ratio is introduced such that the area of one Josephson junction among the three Josephson junctions is α (0.3≦α≦0.7) times the area of the other Josephson junctions having an equal area, wherein the junction cross-sectional area of the three Josephson junctions is set to be large at β (2≦β≦200) times the junction cross-sectional area of the basic magnetic flux-type superconducting quantum circuit element while the α junction ratio is maintained, whereby an increased coherence time is achieved.

The present disclosure relates to a TWPA device (1) for a quantum computer, which has a two-band dispersion relation and is configured to perform three-wave mixing. The TWPA device (1) comprises a chain of unit cells (φ), each comprising a non-linear inductance element (5) and a capacitor (6) connected to its ground (7). The unit cell (φ) further comprises a resonator circuit (8) and one of the periodically modulated input parameters. The two-band dispersion relation is composed of a lower frequency band and a higher frequency band, sandwiching a frequency gap. Further, the TWPA device (1) is configured to receive an amplified signal and a pump signal at the input (2). The pump signal is in the higher frequency band described above and has a frequency that is at least 2 / 3 of the cut-off frequency of the TWPA device (1) described above, or the pump signal described above is in the lower frequency band described above and its second harmonic has a frequency within the frequency gap described above.

The invention relates to an acoustic signal amplifier adapted for connection to a loudspeaker and for communication with a digital computer via at least one first data bus. The amplifier is characterized in that it comprises: a sampling register including several current samples captured at a sampling frequency; a first threshold volume register associated with a first threshold value; a first comparator adapted for comparing current samples from the sampling register to the first threshold value of the first volume register; a first time counter adapted for being triggered when a compared current sample is greater than the first threshold value and adapted for being reset when another compared current sample is less than the first threshold value; and an alert unit.adapted to send an alert on the first data bus to the digital computer when the first time counter reaches a first threshold time value. Figure 2a,

Disclosed is a method of manufacturing a Josephson travelling wave parametric amplifier, JTWPA (400), which comprises providing, on a substrate (406), a bottom conductive layer (404, 405), a dielectric layer (408), and a top conductive layer (403), the top conductive layer at least partly forming nonlinear inductors (409), top capacitor plates of parallel plate capacitors and / or conductive strips interrupted by nonlinear inductors, wherein the top conductive layer (403) is formed using a single instance of an angled evaporation method. The nonlinear inductors (409) may comprise one or more Josephson junctions, and the bottom conductive layer (404, 405) may form a CPW transmission line structure (402).

Apparatus and methods are disclosed for facilitating first and second frequency filtering along with non-reciprocal frequency transformation for electromagnetic isolation.

A device comprises a superconducting parametric interferometric circuit, which comprises a signal input port (P1) and a signal output port (P2), and a first parametric mixing circuit (420-1) and a second parametric mixing circuit (420-2) coupled in parallel between the signal input port and the signal output port. The signal input port configured to receive an input signal having a first frequency. The first parametric mixing circuit is configured to convert the input signal to a first output signal having a second frequency, and the second parametric mixing circuit is configured to convert the input signal to a second output signal having the second frequency. The superconducting parametric interferometric circuit is configured to constructively combine the first and second output signals at the signal output port to generate an output signal having the second frequency, and provide isolation of the signal input port from a signal which is present at the signal output port. Alternatively, the first parametric mixing circuit (620-1) and the second parametric mixing circuit (620-2) are serially cascaded and a delay line (630) is coupled in parallel between the signal input port and the signal output port.

A bandpass parametric amplifier circuit includes a plurality of unit cells. At least one unit cell includes a first inductor having a first node coupled to a center conductor and a second node coupled to ground. There is a first capacitor having a first node coupled to the center conductor and a second node coupled to ground. There is a second inductor having a first node coupled to the center conductor. A second capacitor has a first node coupled to a second node of the second inductor. The second capacitor and the second inductor are in series with the center conductor.

This disclosure relates to a frequency multiplexer (1) comprising a first port (2a), a plurality of second ports (2b), each associated with a specific frequency band, and a plurality of signal filtering sections (30, 40, 50, 60) connecting each of the second ports (2b) to the first port (2a). Each signal filtering section (30, 40, 50, 60) is one of a high-pass signal filtering section (30), a low-pass signal filtering section (40), a band-pass signal filtering section (50), and a band-stop signal filtering section (60). Furthermore, each signal filtering section (30, 40, 50, 60) comprises a chain of superconducting junctions (35, 45, 55, 65).

A parametric traveling wave amplifier (200) is disclosed in which the amplifiers include: a co-planar waveguide, in which the co-planar waveguide includes at least one Josephson junction (210) interrupting a center trace (204) of the co-planar waveguide; and at least one shunt capacitor coupled to the co-planar waveguide, in which each shunt capacitor of the at least one shunt capacitor includes a corresponding superconductor trace (214) extending over an upper surface of the center trace of the co-planar waveguide, and in which a gap separates the superconductor trace from the upper surface of the center trace, and in which the co-planar waveguide including the at least one Josephson junction and the shunt capacitor establish a predefined overall impedance for the traveling wave parametric amplifier.

A bandpass parametric amplifier circuit includes a plurality of unit cells. At least one unit cell includes a first inductor having a first node coupled to a center conductor and a second node coupled to ground. A first capacitor is present having a first node coupled to the center conductor and a second node coupled to ground. A second inductor is present having a first node coupled to the center conductor. A second capacitor has a first node coupled to a second node of the second inductor. The second capacitor and the second inductor are in series with the center conductor.

This invention provides a quantum device, a quantum computing system, and a method for reading out a quantum device that can perform multiple readouts on multiple qubit circuits. [Solution] The quantum device comprises a first qubit circuit, a second qubit circuit, and a cover chip, wherein the first qubit circuit comprises a first port, a first qubit, and a first resonator coupled to the first qubit and the first port and having a first resonant frequency, the second qubit circuit comprises a second port, a second qubit, and a second resonator coupled to the second qubit and the second port and having a second resonant frequency different from the first resonant frequency, and the cover chip comprises waveguides coupled to the first port and the second port. The quantum device can be used, for example, in quantum computing.

The present disclosure relates to a frequency multiplexer (1) comprising a first port (2a); a plurality of second ports (2b), each second port (2b) being associated with a particular frequency band; and a plurality of signal filtering sections (30, 40, 50, 60) connecting each second port to the first port (2b). Each signal filtering section (30, 40, 50, 60) is one of a high-pass signal filtering section (30), a low-pass signal filtering section (40), a band-pass signal filtering section (50), and a band-stop signal filtering section (60). Furthermore, each signal filtering portion (30, 40, 50, 60) comprises a chain (35, 45, 55, 65) of superconducting junctions.

Provided in the present application are a determination method and apparatus for a superconducting impedance transformation parametric amplifier, a superconducting impedance transformation parametric amplifier, an electronic device, a computer program product and a computer-readable storage medium. The method comprises: based on a wavelength parameter, a gain parameter and a bandwidth parameter, calculating an impedance value of an impedance transformation line of a superconducting impedance transformation parametric amplifier and a capacitance value of the amplifier; based on the impedance value of the impedance transformation line, calculating a linewidth dimension of a coplanar waveguide of the superconducting impedance transformation parametric amplifier; based on the impedance value of the impedance transformation line and the capacitance value of the amplifier, calculating a stub dimension of the superconducting impedance transformation parametric amplifier; and based on the linewidth dimension and the stub dimension, determining structural parameters of the superconducting impedance transformation parametric amplifier.