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An Order O(1) Algorithm for Transient Current Calculation in Nanoelectronics

An Order O(1) Algorithm for Transient Current Calculation in Nanoelectronics

Key Problem and Market Opportunity

  • Response time is one of the key performance indicators of high-speed transistors in nanoelectronics
  • As the response time is pushed to the limit, transient current calculation is essential in studying the response time and determining the peak transient current for preventing meltdown of the nanochips 
  • Such calculation is known to be extremely time consuming with the best scaling complexity of TN3 (T is the number of time steps and N is the dimension of the device)
  • The quantum computing software market is estimated at US$88.4 million in 2016 and is expected to grow at a CAGR of 29.04% between 2017 and 2023

Key Advantages of the Technology

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Technology Section Slider 2
  • A novel algorithm based on NEGF-CAP formalism is used to calculate transient current as a function of time step T; it may be further extended to NEGF-DFT-CAP formalism
  • The algorithm provides an Order O(1) complexity if T < N2, where N is the system size (N usually >= 10,000)
  • It is useful for designing nano-devices and predicting their actual responses before actual production
  • Experiments on a gated graphene nanoribbon (Figure 1) confirmed the Order O(1) complexity with N=104 and T=108
  • Such major speedup enables the application of first-principle calculations and nano-device design with ever-increasing performance requirements

Potential Product and Services

  • Technology Computer Aided Design (TCAD) software for Electronic Design Automation
  • Quantum Chemistry and Solid-State Physics Software

Development Status and IP Strength

  • US Patent Application No. 15/424,537
  • PCT Application No. PCT/CN2017/072848
  • Prototype software application developed

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