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159 results about "Squid" patented technology

A SQUID (for superconducting quantum interference device) is a very sensitive magnetometer used to measure extremely subtle magnetic fields, based on superconducting loops containing Josephson junctions.

Liquid nitrogen instant freezer for squids and instant freezing method

The squid liquid nitrogen instant freezer comprises a freezing chamber, the freezing chamber is provided with a conveying belt assembly, the conveying belt assembly is provided with a plurality of arc-shaped protrusions at equal intervals, and a plurality of material turning rod assemblies are installed on the side face, close to the freezing chamber, of a sliding plate; the driving motor drives the conveying belt assembly to move to convey squids to the position below the nitrogen injection assembly, meanwhile, due to the fact that arc-shaped protrusions arranged on the conveying belt assembly enable the squids and the surface of the conveying belt to be spaced and not to make close contact, and the driving motor can synchronously drive a reciprocating lead screw to rotate in the conveying process; and after squids are conveyed in place, the first gear column is separated from a driving gear, and the squids are not conveyed any more, so that the squids are statically located below the nitrogen injection assembly for air injection quick freezing, the contact time of the squids and nitrogen is prolonged, and the quick freezing effect of the squids is guaranteed.
Owner:NINGDE CITY YUEHAI AQUATIC PROD

Marine-derived lactobacillus rhamnosus and application thereof

The invention provides marine-derived lactobacillus rhamnosus S400M01 and application thereof, and relates to the technical field of heavy metal adsorption and removal, the marine-derived lactobacillus rhamnosus S400M01 is preserved in Guangdong Microbial Culture Collection Center (GDMCC) on November 28, 2022, the preservation address is Guangzhou, and the number is GDMCCNO: 63001. The strain can tolerate cadmium chloride concentration up to 1000 mg / L, can tolerate lead concentration up to 800 mg / L, can adsorb and remove heavy metals cadmium and lead in squid viscera, and reduces accumulation of cadmium and lead in viscera of live crucian in a heavy metal polluted water body.
Owner:NINGBO XINUOYA MARINE BIOTECH CO LTD

Rubidium-based magnetometer for BIO-sensing application

The invention relates to a Spin Exchange Relaxation-Free (SERF)-based magnetometer system (100) for detecting ultra- weak magnetic fields, particularly suited for bio¬ sensing applications such as MEG, MCG, and MRI. The system operates at room temperature and includes a VCSEL (101) emitting dual beams tuned to Rubidium-87 transitions, a microfabricated vapor cell (102) with LIAD-based heating (103), and an optical assembly (104) for polarization control. A detection unit (105) converts Faraday rotation into electrical signals, enhanced by lock-in amplification. Magnetic shielding (106), thermal management (107), and relaxation mitigation maintain SERF conditions. A calibration subsystem (109) and embedded machine learning module (110) optimize sensitivity in real time. The compact, cryogen-free architecture enables portable and wearable applications. The invention achieves femtotesla-level sensitivity while overcoming limitations of conventional SQUID-based systems, making it suitable for clinical and field deployments.
Owner:QUANTUMSTATS AI GLOBAL PTE LTD

Quantum processor unit architecture for quantum computing via an arbitrarily programmable interaction connectivity graph

A superconducting quantum processor unit for quantum computing is provided. The processor unit is formed from the union of a qubit chip and a wiring chip with superconducting bonding bumps and spacers. The bumps may be densely distributed around active elements between the two chips and effectively form a Faraday-Cage around the qubits, control signal waveguides etc. The qubit chip has strategically spaced qubits and an inductively coupled probe line and the wiring chip has a bus coupling resonator with a number of voltage nodes and anti-nodes, a resonator pump and at least one SQUID. Magnetic flux applied through the SQUIDs changes their impedances and modifies the microwave boundary conditions of the bus. This allows in-situ shifting of electric field distributions of the resonance modes of the bus along the length of the bus. This tunes the coupling rates of the bus to all qubits simultaneously.
Owner:RGT UNIV OF CALIFORNIA

Superconducting analog-to-digital converter (ADC) system

One example includes a superconducting analog-to-digital converter (ADC) system. The system includes a control line configured to propagate an interrogation pulse and a superconducting quantum interference device (SQUID) comprising a first Josephson junction and a second Josephson junction. The SQUID can be configured to receive an input current. The first Josephson junction can be configured to trigger to provide a first pulse in response to the interrogation pulse and a first polarity of the input current and the second Josephson junction can be configured to trigger to generate a second pulse in response to the interrogation pulse and a second polarity of the input current. The system further includes an output stage configured to propagate the first pulse to an output to indicate the first polarity of the input current.
Owner:NORTHROP GRUMMAN SYSTEMS CORP

Stepped wild domestication device for sepiella maindroni

The invention discloses a sepiella maindroni stepped wild domestication device which comprises a plurality of net cages arranged from inside to outside, each net cage is provided with a plurality of meshes, and the meshes in different net cages are gradually increased from inside to outside in a stepped manner; a plurality of suspension type fish reefs are arranged in the net cage, each suspension type fish reef comprises a plurality of single bodies horizontally installed on the floating rope, and each single body is a shell with a plurality of small holes formed in the shell wall. An area which is flat in terrain, relatively gentle in water flow, rich in plankton and about 10 m in water depth is selected near a sea area to be released as a domestication field, the device is put into the domestication field, and in-situ wild domestication is carried out on sepiella maindroni larvae; and the predation capability, the capability of avoiding enemies and the capability of coping with environmental stress after entering a natural sea area are improved, so that the enhancement and release effects are improved.
Owner:ZHEJIANG OCEAN UNIV

Balanced Squid Tunable Coupler

A tunable coupler system includes an input line configured to receive an input current and a signal line configured to provide a signal line current. The tunable coupler system further includes a first superconducting quantum interference device (SQUID) inductively coupled to the input line and the signal line, and a second SQUID inductively coupled to the input line and the signal line. In addition, the tunable coupler system includes a control line inductively coupled to the first SQUID and the second SQUID. The first SQUID and the second SQUID are configured to couple the input current in the input line to the signal line to form the signal line current. A coupling strength between the input line and the signal line is determined based on a control current in the control line.
Owner:NORTHROP GRUMMAN SYSTEMS CORP

Device and method for performing magnetic resonance imaging of metal or partially metal components and use of the method for imaging of

The invention relates to a magnetic resonance imaging (MRI) device (1) which is designed to image a substantially metallic component. The magnetic resonance imaging device comprises means (b '') for generating a polarized magnetic field intended to be applied to said component (a), radio frequency (RF) means (g) for exciting said component (a), detection means cooperating with antenna means for delivering a magnetic resonance imaging (MRI) signal, and means for processing said MRI signal for delivery with respect to said component (a) and a device for detecting feature information of the state. The component (a) is subjected to a very weak field of less than 10 mT, and the detection means comprise a pickup coil (h) magnetically coupled with the polarization means (b '') and the radio frequency means (g) and operating as a flux concentrator, and an SQUID (Superconducting Quantum Interference Device) detector arranged downstream of said pickup coil (h) via a transformer.
Owner:CHIPIRON

Structure for reducing area of SQUID (superconducting quantum interference device) superconducting loop and preparation method thereof

PendingCN120051199AJunction formationLine width
According to the structure for reducing the area of the SQUID superconducting loop and the preparation method thereof provided by the invention, the laminated structure is formed on the silicon substrate, and then the laminated structure is accurately etched, so that the 3D nano bridge junction is formed on the slope surface of the laminated structure and stretches across the insulating layer, and therefore, batch preparation of the structure for reducing the area of the SQUID superconducting loop can be realized; according to the SQUID probe, large-scale application of the SQUID probe is more facilitated, the plane of the 3D nanometer bridge junction is perpendicular to the plane where the SQUID superconducting loop is located, so that the width of the 3D nanometer bridge junction does not influence the effective loop area of the SQUID any more, the performance of the SQUID can be improved by independently regulating and controlling the thickness of the 3D nanometer bridge junction, the inhibition effect of a magnetic field on the superconducting characteristic of the 3D nanometer bridge junction is greatly weakened, and in addition, the SQUID probe can be applied to a large scale. The SQUID superconducting loop with the minimum line width of 10nm can be prepared by combining the electron beam lithography technology with higher precision, the area of the SQUID superconducting loop can be greatly reduced, and the spin sensitivity is improved, so that higher spatial resolution can be realized during scanning magnetic imaging.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Method for comprehensively evaluating cold resistance of porphyra yezoensis

PendingCN119985364AColor/spectral properties measurementsBiotechnologyPhotosynthetic pigment
The invention provides a cold resistance comprehensive evaluation method for porphyra yezoensis, and belongs to the technical field of biological breeding. Four phenotypic indexes related to the cold resistance character are obtained through screening experiments, the four phenotypic indexes are the leaf area of the porphyra yezoensis thallus, the maximum light quantum efficiency Fv / Fm, the photosynthetic pigment chlorophyll a and allophycocyanin respectively, and the four phenotypic indexes can not only meet sustainable determination in a lossless state, but also can be used for detecting the cold resistance character of the porphyra yezoensis. And the cold resistance evaluation model constructed based on the few phenotypic indexes can achieve the purpose of accurately, efficiently and comprehensively evaluating the cold resistance of the porphyra yezoensis. Experimental results show that the method provided by the invention is relatively consistent with the cold resistance of an actual porphyra yezoensis variety or strain, the cold resistance grade of a to-be-detected sample can be accurately identified, the blank of cold resistance evaluation of the porphyra yezoensis is filled, and a technical basis is provided for subsequent screening, identification and breeding of a cold-resistant porphyra yezoensis culture variety.
Owner:OCEAN UNIV OF CHINA

Primer probe composition, kit and application of primer probe composition and kit in identification of rhinogobio ventralis species or detection of rhinogobio ventralis population abundance

The invention provides a primer probe composition, a kit and application of the primer probe composition to identification of rhinogobio ventralis species or detection of rhinogobio ventralis population abundance. The primer probe composition disclosed by the invention is simple to use, accurate in result and high in repeatability; the method has high accuracy and can avoid errors caused by gene diversity in a population; the kit has high sensitivity, and the detected minimum DNA concentration can reach 1 * 10 < 3 > copies / mu L; the method also has good interspecific specificity, can effectively distinguish rhinogobio ventralis and other fishes, and even can distinguish rhinogobio ventralis and related species, such as rhinogobio ventralis and rhinogobio cylindrica. Under the background of continuous decline of rhinogobio ventralis population resources, accurate monitoring of rare species can be realized, and data support is provided for resource management protection of rhinogobio ventralis.
Owner:CHINA THREE GORGES CORPORATION

Superconducting quantum circuit

A superconducting quantum circuit includes first to fourth qubits, and a coupler including first and second electrodes and a nonlinear element bridging the first and second electrodes, wherein each of the first to fourth qubits includes a resonator including a SQUID loop circuit and a capacitor connected in parallel to the loop circuit, the first and second qubits and the third and fourth qubits capacitively coupled to the first and second electrodes of the coupler, respectively, wherein a magnitude relationship among a capacitance value C of a capacitive coupling between each of the first to fourth qubits and the coupler, a capacitance value CJ of the capacitor connected in parallel to the loop circuit for each of the first to fourth qubits, and a capacitance value Cg between the first and second electrodes of the coupler, is set to CJ>Cg>C.
Owner:NEC CORP

Diagnostic circuit

A diagnostic circuit includes a superconducting quantum interference device (SQUID) configured to be coupled to a test circuit such that an electronic noise present in the test circuit induces a first current that flows through the SQUID. The diagnostic circuit also includes a current path configured to receive a second current that flows through the SQUID. The SQUID is configured to generate an output in a form of: a first voltage in response to a sum of the first current and the second current being less than a threshold current and a second voltage in response to the sum of the first current and the second current being greater than the threshold current.
Owner:THE BOEING CO

A mixed culture method of Porphyra yezoensis and Ulva longissima

The present invention proposes a mixed culture method of Porphyra yezoensis and Ulva feldspar. The present invention comprises: 1) Porphyra yezoensis is planted in late September, and conchospore seedlings of Porphyra yezoensis are collected on a culture net, and the net is hung in the sea; 2) Porphyra yezoensis culture management is performed by drying and washing the net according to the epiphytic conditions of miscellaneous algae; 3) Porphyra yezoensis is harvested and cultured for 50-60 days, and Porphyra yezoensis is harvested; 4) Ulva feldspar seedlings and planting are collected, Ulva feldspar seed vegetables are washed, ripened, released, filtered, and sprinkled with Ulva feldspar spore water, and the Ulva feldspar seed vegetables are put into a net bag and hung on the culture net for culture; 5) Ulva feldspar culture management continues to harvest Porphyra yezoensis, and all Porphyra yezoensis on the net are harvested; 6) Ulva feldspar is harvested and cultured for 70-80 days, and Ulva feldspar is harvested. The invention has simple operation and fewer steps, improves the breeding efficiency, realizes the mixed breeding of Porphyra yezoensis and Ulva longissima, makes full use of the breeding sea area and equipment, reduces the cost, and achieves the effect of increasing production and income.
Owner:SHANDONG ACAD OF MARINE SCI (QINGDAO NAT MARINE SCI RES CENT)

Special compound feed for mottled bamboo shark parents and preparation method of special compound feed

The invention discloses a special compound feed for mottled bamboo shark parents and a preparation method of the special compound feed. The special compound feed comprises imported fish meal, domestic chicken meal, squid paste and the like. The preparation method comprises the following steps: crushing and mixing the raw materials, adding water, carrying out steam tempering and curing, granulating, and naturally cooling to obtain the special compound feed for the matta striata shark parents. The prepared special compound feed for the mottled bamboo shark parents is excellent in food calling performance, the problem that artificially domesticated sharks are anorexia and refusal to eat artificial compound feed can be successfully solved, chilled baits are effectively replaced, the breeding cost is reduced, and the pathogen invasion risk caused by unstable quality of the chilled baits is fundamentally avoided. The special compound feed for the parents can also optimize the water environment and realize ecological and healthy breeding of the sharks, the high stability of the special compound feed remarkably reduces the organic matter load of the water caused by bait dissolution loss, the concentration of ammonia nitrogen and nitrite in the water is controlled from the source, the water change frequency and the use of drugs are reduced, and a stable and clean breeding environment is provided for the parents.
Owner:广东华南珍稀野生动物物种保护中心

Magnet-less circulator for hybrid-classical qubit read-out systems with built-in phase modulation

The technology described herein is directed towards a cryogenic magnet-less circulator device, in which the circulator device is based on the spatiotemporal modulation of angular momentum for microwave photons, controlled using a modulated control signal. The circulator device is configured for integration with a quantum computer, e.g., to facilitate qubit measurements. The circulator topology and design are based on tank circuits, e.g., arranged in a star topology with different sets of radio frequency superconducting quantum interference devices (rf-SQUIDS) per tank circuit, that resonate out-of-phase based on the modulated control signal. A single control line can be used to operate the circulator. The circulator can be fabricated using standard semiconductor processes, allowing one or more circulators to be integrated on the same superconducting chip as the qubits. A classical computer can be used to output the modulated control signal, and adapt the modulated control signal as needed under varying conditions.
Owner:DELL PROD LP

High-temperature superconducting weak magnetic detection device and system

The invention provides a high-temperature superconducting weak magnetic detection device and system, and the device comprises a Dewar which is internally provided with a refrigerant; the reading circuit module comprises a reading circuit board and a shielding shell; an annular cavity is formed in the shielding shell, and the reading circuit board is arranged in the shielding shell; the embedded structure is inserted into the Dewar, an installation position of an SQUID chip is arranged on the embedded structure, and a lead channel is arranged on the side wall of the embedded structure; and the heat insulation structure is fixed and filled in the upper end opening of the embedded structure. According to the high-temperature superconducting weak magnetic detection device and system, connectors and fasteners do not need to be disassembled and assembled frequently in the refrigerant filling process, and operation is convenient; electrostatic point discharge is not easy to generate, and the electrostatic damage rate of the high-temperature SQUID is reduced; the high-temperature SQUID does not need to be exposed in the air in the refrigerant filling process, performance degradation of the SQUID is avoided, and the service life and the performance stability of the SQUID are further ensured; the fault rate of the system is reduced in practical application, and the reliability and stability of the system are improved.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Superconducting analog-to-digital converter (ADC) system

One example includes a superconducting analog-to-digital converter (ADC) system. The system includes a control line configured to propagate an interrogation pulse and a superconducting quantum interference device (SQUID) comprising a first Josephson junction and a second Josephson junction. The SQUID can be configured to receive an input current. The first Josephson junction can be configured to trigger to provide a first pulse in response to the interrogation pulse and a first polarity of the input current and the second Josephson junction can be configured to trigger to generate a second pulse in response to the interrogation pulse and a second polarity of the input current. The system further includes an output stage configured to propagate the first pulse to an output to indicate the first polarity of the input current.
Owner:NORTHROP GRUMMAN SYSTEMS CORP

Fish slice moisture control processing device under a standard

This invention relates to the field of squid slice moisture control technology, and more particularly to a standard squid slice moisture control processing device, comprising a main plate, a first groove at the upper end of the main plate, a uniform kneading mechanism for uniformly kneading the squid slices at the upper end of the main plate, the uniform kneading mechanism comprising two seventh electric telescopic rods symmetrically arranged at the lower end of the main plate, the telescopic ends of the two seventh electric telescopic rods being respectively fixedly connected to limit blocks, the upper ends of the two limit blocks being respectively provided with second grooves, and a vacuum spraying mechanism for vacuuming and spraying conditioning agents inside the main plate at the upper end of the main plate; a first fixed body and the telescopic ends of the fifth electric telescopic rods are connected by a pressure sensor, the thickness of the squid slices can be detected by the telescopic amount of several fifth electric telescopic rods, and then the fifth electric telescopic rods are controlled by the pressure sensor to achieve kneading with corresponding force according to the thickness of the squid slices.
Owner:WENDENG YAMENG FOOD CO LTD

Intelligent interpretable forecasting method for northwest pacific ocean squid center fishery

PendingCN119807642AForecastingBiological modelsPacific oceanSquid
The invention discloses an interpretable intelligent forecasting method for a northwest pacific ocean squid center fishing ground, and belongs to the technical field of ocean fishing condition analysis and processing. Comprising the steps that historical fishery data and corresponding environment data are acquired, and the fishing catch per unit fishing effort per month is obtained; fitting the fishing catch per unit fishing effort per month and the environment data, and screening out an environment variable with a dome-shaped residual error as an interpretable environment variable; constructing a fishery forecasting model based on an extreme gradient lifting tree; according to the month to which the target date belongs, a central fishing ground for squid inhabiting in the northwest Pacific Ocean is obtained through spatial intersection and spatial superposition qualitative analysis; and quantitatively predicting a central fishery in which the squid inhabits in the northwest Pacific Ocean based on the fishery forecasting model. According to the method, the credibility of fishery managers and fishermen on forecast products is enhanced through the interpretable environment variables screened by the generalized additive model, and the extreme gradient boosting tree fishery forecast model constructed on the basis of the interpretable environment variables can effectively capture the change of the squid resource quantity.
Owner:SHANGHAI OCEAN UNIV +2

Squid-like food and method for producing the same

To provide a squid-like food that reproduces the texture of natural squids.SOLUTION: A squid-like food contains water of 40 wt.% or more relative to the total weight and comprises a protein sheet composed of textured soybean protein material, both ends of which are bonded together, forming a cylindrical body. The textured soybean protein material comprises protein fibers. The protein fibers are oriented in a fixed direction. The direction in which the protein fibers are oriented generally matches the circumferential direction of the cylindrical body.SELECTED DRAWING: Figure 1
Owner:IBIDEN CO LTD

On-chip integrated squid cryogenic thermometer and method of making the same

The present disclosure relates to a second-order gradient independent input feedback superconducting quantum interference device and a preparation method thereof, comprising: eight superconducting pads, the eight superconducting pads comprising four input superconducting pads and four negative feedback superconducting pads, one input superconducting pad and one negative feedback superconducting pad forming one superconducting loop, the four superconducting loops being in parallel and arranged in a central symmetry; an input coil, the input coil being coupled with the four input superconducting pads; and a negative feedback coil, the negative feedback coil being coupled with the four negative feedback superconducting pads. The present disclosure can effectively reduce the crosstalk phenomenon between the input coil and the feedback coil, and improve the coupling coefficient and the transfer efficiency of the input coil and the feedback coil.
Owner:NATIONAL INSTITUTE OF METROLOGY CHINA

Raft type cuttlefish breeding device

The utility model discloses a cuttlefish raft-type culture device, including raft-type net rack, bottom netting, side netting and flow control plate, the raft-type net rack is internally provided with a charging and discharging cavity, the raft-type net rack is provided with a water inlet and a water outlet which are communicated with the charging and discharging cavity, the bottom netting is connected on the raft-type net rack, the side netting is arranged around the raft-type net rack, and the flow control plate is arranged on the bottom netting. The raft-type net rack is arranged on the bottom netting and matched with the bottom netting to form a culture area with an opening in the upper end, a flow control plate is further connected to the center of the bottom netting, and when the raft-type net rack is arranged in a culture pond, the flow control plate is located over a water outlet of the culture pond; the method has the advantages that the stress reaction of cuttlefish in the operation process can be reduced, the breeding survival rate of the cuttlefish is improved, the breeding operation is simplified, and the labor intensity is reduced.
Owner:NINGBO ACADEMY OF OCEAN & FISHERY

LED fish gathering lamp

The utility model relates to the technical field of fishery production tools, in particular to an LED fish gathering lamp which comprises a fish gathering lamp body, a connecting rod and squid fishing hooks. The two sides of the fish gathering lamp body are connected with the connecting rods, each connecting rod is provided with at least one squid fishing hook, and the bottom ends of the two connecting rods are bent towards the other connecting rod and connected with the bottom end of the other connecting rod. First light sources are arranged at the top end and the bottom end of the fish gathering lamp body, second light sources are arranged on the front face and the back face of the fish gathering lamp body, and the first light sources and the second light sources are different in color. A circuit control board is arranged in the fish gathering lamp body and electrically connected with the first light source and the second light source. The fish trap has various light sources, can be suitable for trapping different fishes, and is high in hooking rate.
Owner:佛照(海南)科技有限公司

Method for preparing biological fresh-keeping agent from squid processing waste

The invention discloses a method for preparing a biological fresh-keeping agent by using squid processing wastes, which comprises the following steps: drying and crushing the wastes such as squid heads and skins, and performing enzymolysis with papain to obtain a polypeptide mixture; and then grafting with 3-O-ferulic acid quinic acid and 2, 5-dimethoxy cinnamic acid, dialyzing and freeze-drying to obtain the biological fresh-keeping agent. The sleeve-fish processing waste is used as a raw material, the antioxidant and antibacterial properties of the polypeptide are enhanced through a grafting reaction, the cost is low, the process is green, and the sleeve-fish preservative is suitable for coating preservation of aquatic products such as sleeve-fish and shrimps and has the advantages of efficient corrosion prevention and resource recycling.
Owner:XINGYE ZHOUSHAN

Lure wood shrimp lure (X-SEM patrol island)

ActiveCN309493134SCuttlefishSquid
1. Name of this design product: Lure Wood Shrimp Lure (X‑SEM). 2. Purpose of this design product: used for fishing squid and cuttlefish at sea. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the design points: top view.
Owner:SHENZHEN DISCOVERY PUNCTUATION OUTDOOR TECHNOLOGY CO LTD

Method and test system for coupling a magnetic gradiometer to a squid to improve sensitivity

The application relates to the technical field of magnetic detection, in particular to a method and a test system for coupling a magnetic gradiometer and a SQUID to improve sensitivity, which comprises the following steps: deploying at least one set of magnetic gradiometer probe arrays in a superconducting shielding environment to obtain original magnetic gradiometer tensor data streams of a target area; feeding a multi-channel SQUID front-end input coil through a superconducting transmission line; completing magnetic flux locking and amplification to generate a preliminary signal by the SQUID; suppressing environmental and SQUID background noise by using an adaptive digital noise reduction processor to obtain a high-fidelity magnetic gradiometer signal; and generating a high-resolution magnetic gradiometer distribution map through gradient reconstruction and spatial resolution enhancement. The superconducting shielding environment combines array acquisition to suppress external interference and retain complete tensor characteristics, and the superconducting transmission line combines a multi-channel SQUID to reduce transmission noise and cumulative error, so that the signal is closer to the original state, and the SQUID locking sensitivity and amplification fidelity are improved. The application improves the sensitivity of magnetic gradiometer detection and the accuracy of target identification.
Owner:BEIJING SQUID QUANTUM TECH

Natural frequency-adjustable superconducting quantum coupler capable of resisting magnetic flux noise

The invention relates to a frequency-adjustable superconducting quantum coupler capable of naturally resisting magnetic flux noise, which comprises a DC-SQUIDs (Direct Current-Superconducting Quantum IDs), namely a superconducting ring consisting of two Josephson junctions, a bias control line for adjusting the critical current of the SQUIDs, and a capacitor or inductance circuit component adapted to adjust coupling parameters, the DC-SQUIDs are of a planar inner loop structure, the loop comprises two Josephson junctions, two arms of the SQUIDs are mutually crossed to form 2N identical superconducting loops, namely sub-loops, and N is a positive integer; the bias control line changes the magnetic flux in the loop by applying a bias magnetic field, so that the critical current of the SQUIDs is changed, and then the frequency of the superconducting quantum coupler can be regulated and controlled. In the process of actively adjusting the frequency of the coupler, the induced current of the N sub-loops in the SQUIDs flows clockwise, and the induced current of the other N sub-loops flows anticlockwise, so that a loop is integrally formed.
Owner:NAT UNIV OF DEFENSE TECH