Quantum information processing with majorana bound states in superconducting circuits

Schrade, Constantin; Fu, Liang

Title: Quantum information processing with majorana bound states in superconducting circuits

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Abstract

In a weak link of two s-wave superconductors (SCs) coupled via a time-reversal-invariant (TRI) topological superconducting (TSC) island, a Josephson current can flow due to Cooper pairs tunneling in and out of spatially separated Majorana Kramers pairs (MKPs), which are doublets of Majorana bound states (MBSs). The sign of the resulting Josephson current is fixed by the joint parity of the four Majorana bound states that make up the MKPs on the TSC island. This parity-controlled Josephson effect can be used as a read-out mechanism for the joint parity in Majorana-based quantum computing. For a TSC island with four terminals, the SC leads can address a Majorana superconducting qubit (MSQ) formed by the charge ground states of the TSC island's terminals. Cooper pair splitting enables single-qubit operations, qubit read-out, as well as two-qubit entangling gates. Hence, TSC islands between SC leads may provide an alternative approach to superconducting quantum computation.

Inventors:: Schrade, Constantin; Fu, Liang

Issue Date:: 2020-03-17

Research Org.:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1637844

Patent Number(s):: 10593879

Application Number:: 16/244,176

Assignee:: Massachusetts Institute of Technology (Cambridge, MA)

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

G - PHYSICS G06 - COMPUTING G06N - COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
H01L39/228 - {three or more electrode devices, e.g. transistor-like structures}
H01L49/003 - {Devices using Mott metal-insulator transition, e.g. field effect transistors}
H01L39/223 - {Josephson-effect devices}

G - PHYSICS G06 - COMPUTING G06N - COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS
G06N10/00 - Quantum computers, i.e. computer systems based on quantum-mechanical phenomena

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
B82Y10/00 - Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic

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DOE Contract Number:: SC0010526

Resource Type:: Patent

Resource Relation:: Patent File Date: 01/10/2019

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Schrade, Constantin, and Fu, Liang. Quantum information processing with majorana bound states in superconducting circuits.  United States: N. p., 2020. 
        Web.

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                    Schrade, Constantin, & Fu, Liang. Quantum information processing with majorana bound states in superconducting circuits.  United States.

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                    Schrade, Constantin, and Fu, Liang. Tue .  
        "Quantum information processing with majorana bound states in superconducting circuits".  United States.  https://www.osti.gov/servlets/purl/1637844.

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@article{osti_1637844,

  title        = {Quantum information processing with majorana bound states in superconducting circuits},

  author       = {Schrade, Constantin and Fu, Liang},

  abstractNote = {In a weak link of two s-wave superconductors (SCs) coupled via a time-reversal-invariant (TRI) topological superconducting (TSC) island, a Josephson current can flow due to Cooper pairs tunneling in and out of spatially separated Majorana Kramers pairs (MKPs), which are doublets of Majorana bound states (MBSs). The sign of the resulting Josephson current is fixed by the joint parity of the four Majorana bound states that make up the MKPs on the TSC island. This parity-controlled Josephson effect can be used as a read-out mechanism for the joint parity in Majorana-based quantum computing. For a TSC island with four terminals, the SC leads can address a Majorana superconducting qubit (MSQ) formed by the charge ground states of the TSC island's terminals. Cooper pair splitting enables single-qubit operations, qubit read-out, as well as two-qubit entangling gates. Hence, TSC islands between SC leads may provide an alternative approach to superconducting quantum computation.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2020},

  month        = {3}

}

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