Patent
System and method for array diagnostics in superconducting integrated circuit
Amol Inamdar,Jie Ren,Denis Amparo +2 more
- 13 Apr 2016
3
TL;DR: In this article, a superconducting circuit is disclosed for fast digital readout of on-chip diagnostics in an array of devices in an integrated circuit, which includes a digital RSFQ multiplexer to select the readout channel.
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Abstract: A superconducting circuit is disclosed for fast digital readout of on-chip diagnostics in an array of devices in an integrated circuit. The digital readout comprises a digital RSFQ multiplexer to select the readout channel. This permits a large number of devices to be tested with a minimum of input and output lines. The devices may comprise digital devices (such as elementary RSFQ cells), or analog devices (such as inductors, resistors, or Josephson junctions) with a SQUID quantizer to generate a digital signal. The diagnostic array and the digital multiplexer are preferably configured to operate as part of the same integrated circuit at cryogenic temperatures.
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Citations
Patent
Superconducting system architecture for high-performance energy-efficient cryogenic computing
Engin Ipek,Ben Feinberg,Shibo Wang,Mahdi Nazm Bojnordi,Ravi Patel,Eby G. Friedman +5 more
- 10 Nov 2016
TL;DR: In this article, an energy efficient rapid single flux quantum (ERSFQ) logic register wheel includes a circular shift register having a plurality of destructive read out (DRO) cells each entry of the register includes a data block, a tag, and a valid bit.
8
Patent
System and method for cryogenic optoelectronic data link
Igor V. Vernik,Oleg A. Mukhanov,Alan M. Kadin,Christopher T. Phare,Michal Lipson,Keren Bergman +5 more
- 18 Nov 2016
TL;DR: In this article, an optoelectronic data link, comprising a sending module operating at a cryogenic temperature less than 100 K, is proposed. But the modulator may be integrated on the same chip as the cryogenic electrical devices, each coupled to its own modulator.
2
Patent
Individual qubit excitation control with a global excitation drive
Rami Barends
- 31 Dec 2019
TL;DR: In this article, the authors present a method for individual qubit excitation control with a global excitation drive, which includes accessing a quantum system that comprises a plurality of qubits; a pluralityof qubit frequency control lines; a driveline; a couplers, each coupler coupling a corresponding qubit to the drivelines; determining one or more qubits that require a rotation operation.
References
Dressed Qubits
Lian-Ao Wu,Daniel A. Lidar +1 more
TL;DR: A "dressed qubit" transformation is proposed for dealing with inherent gate errors in quantum computation, which does not require additional operations or encoding redundancy, is insensitive to error magnitude, and imposes no new experimental constraints.