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公开(公告)号：US20240070498A1
公开(公告)日：2024-02-29
申请号：US18331465
申请日：2023-06-08
Applicant: International Business Machines Corporation
Inventor： Jared Barney Hertzberg , Sami Rosenblatt , Easwar Magesan , John Aaron Smolin
CPC classification number: G06N10/00 , G06F13/4068 , H10N99/05 , B82Y10/00
Abstract: Techniques facilitating frequency allocation in multi-qubit circuits are provided. In one example, a computer-implemented method comprises determining, by a device operatively coupled to a processor, an estimated fabrication yield associated with respective qubit chip configurations by conducting simulations of the respective qubit chip configurations at respective frequency offsets; and selecting, by the device, a qubit chip configuration from among the respective qubit chip configurations based on the estimated fabrication yield associated with the respective qubit chip configurations.
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公开(公告)号：US20230289400A1
公开(公告)日：2023-09-14
申请号：US17694063
申请日：2022-03-14
Applicant: International Business Machines Corporation
Inventor： Malcolm Scott Carroll , Sami Rosenblatt , Abhinav Kandala
Abstract: One or more systems, devices, computer program products and/or computer-implemented methods of use provided herein relate to determining estimated true relaxation times of qubits absent measurement of entire T1 decay times of the qubits. A system can comprise a memory that stores computer executable components; and a processor that executes the computer executable components stored in the memory, wherein the computer executable components are executable to cause, by the processor, one or more energy relaxation measurements, using a pulse generation, at the qubit frequency for a qubit and at a plurality of shifted frequencies for the qubit, and to determine, by the processor, a true average relaxation time of the qubit based on the plurality of energy relaxation measurements.
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公开(公告)号：US11734597B2
公开(公告)日：2023-08-22
申请号：US17240095
申请日：2021-04-26
Applicant: International Business Machines Corporation
Inventor： Jared Barney Hertzberg , Sami Rosenblatt , Easwar Magesan , John Aaron Smolin
CPC classification number: G06N10/00 , G06F13/4068 , H10N99/05 , B82Y10/00
Abstract: Techniques facilitating frequency allocation in multi-qubit circuits are provided. In one example, a computer-implemented method comprises determining, by a device operatively coupled to a processor, an estimated fabrication yield associated with respective qubit chip configurations by conducting simulations of the respective qubit chip configurations at respective frequency offsets; and selecting, by the device, a qubit chip configuration from among the respective qubit chip configurations based on the estimated fabrication yield associated with the respective qubit chip configurations.
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公开(公告)号：US11700777B2
公开(公告)日：2023-07-11
申请号：US17021585
申请日：2020-09-15
Applicant: International Business Machines Corporation
Inventor： Sami Rosenblatt , Jared Barney Hertzberg , Rasit Onur Topaloglu , Markus Brink
IPC: H01L29/66 , H10N69/00 , H10N60/01 , G01R33/035 , H03K19/195 , H10N60/12 , H10N60/80
CPC classification number: H10N69/00 , H10N60/0912 , G01R33/0354 , H03K19/195 , H10N60/12 , H10N60/805
Abstract: Techniques related to vertical silicon-on-metal superconducting quantum interference devices and method of fabricating the same are provided. Also provided are associated flux control and biasing circuitry. A superconductor structure can comprise a silicon-on-metal substrate that can comprise a first superconducting layer, comprising a first superconducting material, between a first crystalline silicon layer and a second crystalline silicon layer. The superconducting structure can also comprise a first via comprising a first Josephson junction and a second via comprising a second Josephson junction. The first via and the second via can be formed between the first superconducting layer and a second superconducting layer, comprising a second superconducting material. An electrical loop around a defined area of the second crystalline silicon layer can comprise the first via comprising the first Josephson junction, the second via comprising the second Josephson junction, the first superconducting layer, and the second superconducting layer.
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公开(公告)号：US11482657B2
公开(公告)日：2022-10-25
申请号：US16676598
申请日：2019-11-07
Applicant: International Business Machines Corporation
Inventor： Rasit Onur Topaloglu , Sami Rosenblatt
Abstract: Systems and techniques providing suitable chip structures for facilitating antenna-based thermal annealing of qubits are provided. In one example, a radio frequency emitter can comprise a voltage-controlled oscillator and an antenna. The voltage-controlled oscillator can receive power-on signals from a microcontroller, thereby causing the voltage-controlled oscillator to generate an electromagnetic wave. The antenna can then direct the electromagnetic wave onto a set of one or more capacitor pads of a Josephson junction on a superconducting qubit chip, thereby annealing the Josephson junction. In another example, a voltage regulator and a digital-to-analog converter or digital-to-digital converter can be coupled in series between the microcontroller and the voltage-controlled oscillator, thereby allowing the voltage-controlled oscillator to be voltage and/or frequency tunable and eliminating the need for external power routing as compared to photonic laser annealing. In yet another example, a bipolar-junction and complementary metal-oxide semiconductor stack construction can be employed.
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Patent Agency Ranking
公开(公告)号：US20210234087A1
公开(公告)日：2021-07-29
申请号：US17230607
申请日：2021-04-14
Applicant: International Business Machines Corporation
Inventor： Rasit Onur Topaloglu , Sami Rosenblatt
Abstract: Systems, computer-implemented methods, and techniques facilitating antenna-based thermal annealing of qubits are provided. In one example, a first antenna can be positioned above a superconducting qubit chip having a first Josephson junction and a second Josephson junction. The first antenna can direct a first electromagnetic wave toward the first Josephson junction. A first length of a first defined vertical gap, between the first antenna and the superconducting qubit chip, can be sized to cause the first electromagnetic wave to circumscribe a first set of one or more capacitor pads of the first Josephson junction, thereby annealing the first Josephson junction, without annealing the second Josephson junction. In another example, the first length of the first defined vertical gap can be a function of a model of the first electromagnetic wave as a cone, wherein the cone originates from the first antenna and extends toward the superconducting qubit chip.
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公开(公告)号：US10956828B2
公开(公告)日：2021-03-23
申请号：US16445717
申请日：2019-06-19
Applicant: International Business Machines Corporation
Inventor： Jerry M. Chow , Sami Rosenblatt
Abstract: A quantum computing device is formed using a first chip and a second chip, the first chip having a first substrate, a first set of pads, and a set of Josephson junctions disposed on the first substrate. The second chip has a second substrate, a second set of pads disposed on the second substrate opposite the first set of pads, and a second layer formed on a subset of the second set of pads. The second layer is configured to bond the first chip and the second chip. The subset of the second set of pads corresponds to a subset of the set of Josephson junctions selected to avoid frequency collision between qubits in a set of qubits. A qubit is formed using a Josephson junction from the subset of Josephson junctions and another Josephson junction not in the subset being rendered unusable for forming qubits.
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公开(公告)号：US10944039B2
公开(公告)日：2021-03-09
申请号：US16445764
申请日：2019-06-19
Applicant: International Business Machines Corporation
Inventor： Jerry M. Chow , Sami Rosenblatt
Abstract: A quantum computing device is formed using a first chip and a second chip, the first chip having a first substrate, a first set of pads, and a set of Josephson junctions disposed on the first substrate. The second chip has a second substrate, a second set of pads disposed on the second substrate opposite the first set of pads, and a second layer formed on a subset of the second set of pads. The second layer is configured to bond the first chip and the second chip. The subset of the second set of pads corresponds to a subset of the set of Josephson junctions selected to avoid frequency collision between qubits in a set of qubits. A qubit is formed using a Josephson junction from the subset of Josephson junctions and another Josephson junction not in the subset being rendered unusable for forming qubits.
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公开(公告)号：US10784432B2
公开(公告)日：2020-09-22
申请号：US16246676
申请日：2019-01-14
Applicant: International Business Machines Corporation
Inventor： Sami Rosenblatt , Markus Brink , Rasit Onur Topaloglu
IPC: H01L39/22 , H01L39/24 , H03K19/195 , H01L39/12 , B82Y10/00 , H01L27/18 , H01L39/02 , B82Y40/00 , G06N10/00
Abstract: Techniques for a vertical Josephson junction superconducting device are provided. In one embodiment, a chip surface base device structure is provided that comprises a substrate comprising crystalline silicon that is coupled with a first superconducting layer, wherein the first superconducting layer is coupled with a second substrate comprising crystalline silicon. In one implementation, the chip surface base device structure also comprises a vertical Josephson junction located in an etched region of the substrate, the vertical Josephson junction comprising a first superconducting layer, a tunnel barrier layer, and a top superconducting layer.
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公开(公告)号：US10707402B2
公开(公告)日：2020-07-07
申请号：US16591993
申请日：2019-10-03
Applicant: International Business Machines Corporation
Inventor： Sami Rosenblatt , Rasit Onur Topaloglu
Abstract: Systems and techniques facilitating antenna-based thermal annealing of qubits are provided. In one example, a radio frequency emitter, transmitter, and/or antenna can be positioned above a superconducting qubit chip having a Josephson junction coupled to a set of one or more capacitor pads. The radio frequency emitter, transmitter, and/or antenna can emit an electromagnetic signal onto the set of one or more capacitor pads. The capacitor pads can function as receiving antennas and therefore receive the electromagnetic signal. Upon receipt of the electromagnetic signal, an alternating current and/or voltage can be induced in the capacitor pads, which current and/or voltage thereby heat the pads and the Josephson junction. The heating of the Josephson junction can change its physical properties, thereby annealing the Josephson junction. In another example, the emitter can direct the electromagnetic signal to avoid unwanted annealing of neighboring qubits on the superconducting qubit chip.
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