42results 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).

A traveling-wave parametric amplifier (TWPA) transmission line having an improved bandwidth includes one or more unit cells. Each unit cell includes a capacitor and a Josephson junction connected in series and leading to ground, configured to provide inductance and non-linearity. One or more distributed resonators are coupled to the transmission line. The distributed resonators are configured to (i) use a first harmonic mode of the resonator for resonance phase matching in the transmission line and (ii) prevent the second mode of the resonator from interacting with the intermodulation product of the transmission line.

Embodiments of the present application disclose an optical signal replication device and an optical parametric amplifier, which are applied to the communication field. In the embodiments of the present application, the optical signal replication device included in the optical parametric amplifier generates an invalid signal during the process of transmitting the signal light and the pump light. The optical signal replication device can separate the signal light from the invalid signal and then transmit it to the signal processing module. In this way, the signal processing module can directly process the signal light that does not include the invalid signal, and the invalid signal will not occupy the transmission bandwidth of the optical parametric amplifier, so the effective transmission bandwidth of the optical parametric amplifier is relatively large.

The present application provides a method and apparatus for determining 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, and the method for determining a superconducting impedance transformation parametric amplifier includes the steps of: 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 a wavelength parameter, a gain parameter, and a bandwidth parameter; calculating a linewidth size of a coplanar waveguide of the superconducting impedance transformation parametric amplifier based on the impedance value of the impedance transformation line; calculating a stub size of the superconducting impedance transformation parametric amplifier based on the impedance value of the impedance transformation line and the capacitance value of the amplifier; and determining a structural parameter of the superconducting impedance transformation parametric amplifier based on the linewidth size and the stub size.

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.

In certain aspects, an apparatus includes a transformer including an input inductor and an output inductor, wherein the input inductor is magnetically coupled to the output inductor. The apparatus also includes a transconductance driver configured to drive the input inductor based on an input signal. The apparatus further includes a feedback circuit configured to detect an output voltage swing at the output inductor, generate a regulated voltage at the input inductor, and control the regulated voltage based on the detected output voltage swing.

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 Josephson traveling wave parametric amplifier (JTWPA) comprising an input for receiving a signal, an output for providing an amplified output of the signal and one or more circuit segments in series between the input and the output and is configured for receiving a pump tone for transferring energy from the pump tone to the signal and to an idler tone. Each of the one or more circuit segments comprises, in series, one or more superconducting nonlinear elements in series, and a first resonator with a first fundamental resonance frequency configured for phase matching the pump tone with the signal and the idler tone and a second resonator with a second fundamental resonance frequency configured for mitigating pump depletion at a frequency corresponding to a higher harmonic of the pump tone with the second fundamental resonance frequency being higher than the first fundamental resonance frequency.

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,

The present invention provides a method, device, equipment and readable medium for preparing a superconducting quantum parametric amplifier. The method includes: fabricating a transmission line and a Josephson junction on a parametric amplifier chip, and exposing and etching a space with a preset size at a preset position on the transmission line; placing a patch capacitor in the space with the preset size, and fixing the patch capacitor in the space with the preset size using cryogenic glue; connecting both ends of the patch capacitor to both sides of the Josephson junction. By using the solution of the present invention, the fabrication yield of the parametric amplifier can be improved, and the use of commercial patch capacitors can make the parametric amplifier no longer rely on the insulating layer, so that the performance of the parametric amplifier remains stable.

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.

The invention relates to a microwave signal amplifier comprising a chain of nonlinear inductive dipole elements, each forming a superconducting asymmetric loop with Josephson junctions, the chain being arranged between an input of the chain for applying a signal to be amplified and an output of the chain at which an output signal is generated, the amplifier further comprising a controllable magnetic flux generation system for circulating a current in the loops, the amplifier further comprising a first microwave pump and a means for coupling the input of the chain to the first pump, the first pump generating, through the first coupling means, a wave in the chain in the direction from the input towards the output, the frequency of which wave is adjusted in order to transfer power at the frequency of the signal to be amplified. The device further comprises a second microwave pump and a second means for coupling the output of the chain to the second pump, the second pump generating, through the second coupling means, a wave in the chain in the direction from the output towards the input, at a frequency that is different from that of the first pump, so as to attenuate, in said direction from the output towards the input, the microwaves propagating at the frequency of the signal to be amplified.

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).

An embodiment of the present application discloses a method, device, storage medium, and electronic device for real-time positioning of respiratory phases in an olfactory decoding system, which relates to the field of olfactory decoding. In the present application, a low-pass filter unit filters the digital respiratory signal generated by an analog-to-digital converter, and the filtered digital respiratory signal is cycle-locked to generate a respiratory cycle-locked signal. When it is detected that the odor delivery signal is valid, the zero-crossing points of the digital respiratory signal are detected within the first respiratory cycle determined by the respiratory cycle-locked signal, and the phase of the zero-crossing point is used as the starting position for olfactory decoding, realizing the rapid positioning of the respiratory phase after odor delivery and making it possible for the subsequent real-time odor decoding of the olfactory decoding system.

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 cryogenic amplification device (1) is according to the invention configured to include at least two parallel parametric amplification lines (7, 8) to thereby enable reduction of gain ripples in the total frequency spectrum of the amplifier bandwidth. (Fig. 1)

A cryogenic amplification device (1) is according to the invention configured to include at least two parallel parametric amplification lines (7, 8) to thereby enable reduction of gain ripples in the total frequency spectrum of the amplifier bandwidth.

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.