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Progress in Superconduc/ng Qubits
Now reaching 150 microseconds (10-100 ns gate /mes)
0.001 0.01 0.1 1 2011 2012 2013 2014 2015 2016
Two-Qubit Gate Error
Year 2-Qubit Gate Error
Progress in Superconduc/ng Qubits 1 2-Qubit Gate Error Two-Qubit - - PowerPoint PPT Presentation
Progress in Superconduc/ng Qubits 1 2-Qubit Gate Error Two-Qubit - - PowerPoint PPT Presentation
Quantum Toolchains Ali Javadi-Abhari IBM Research Progress in Superconduc/ng Qubits 1 2-Qubit Gate Error Two-Qubit Gate Error 0.1 0.01 Now reaching 150 microseconds (10-100 ns gate /mes) 0.001 2011 2012 2013 2014 2015 2016 Year
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SLIDE 3
SoEware & Architecture Research Device Improvement Research Short-Depth Algorithm Research
Computer Science’s Role?
SLIDE 4
An Example Use of a Toolchain
Cancel Redundant Gates Translate to Device Supported Gates Respect Qubit Connec8vity
SLIDE 5
Exis/ng Toolchains
Quipper Liquid/Q# Project Q Scaffold QISKit Forest XACC Strawberry Fields
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Major Focus Areas for Quantum Toolchains
- 1. Errors
Long term:
- Quantum Error Correc/on to detect/correct general errors
(so expensive that we will basically build an error correc/ng machine, and computa/on will be a byproduct) Near term:
- Heavy circuit op/miza/on to prevent error accumula/on
- Error mi/ga/on techniques
SLIDE 8
Compiling for Future Machines
(ref) Paler, Devi., 2017
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Programmed Circuit Device Good Compiled Circuit #1 Bad Compiled Circuit #2
0.2 0.4 0.6 0.8 1 0.2 0.4 0.6 0.8 1
Correct answer indisAnguishable from noise Noise Correct answer
Compiling for Near Term Machines
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Major Focus Areas for Quantum Toolchains
- 2. Extreme Latency SensiBvity
Limited coherence: limits measure + fast feedback Compilers need to know something about the physical controller layout.
SLIDE 11
Major Focus Areas for Quantum Toolchains
- 3. Circuit Synthesis, OpBmizaBon, Scheduling
- Automa/c synthesis of reversible circuits
- Asympto/cally efficient, reduce constant factors
- Gate iden/ty libraries
- Parallelism is affected by gate commuta/on rela/ons
ref: Nam, Ross, Su, Childs, Maslov
SLIDE 12
Major Focus Areas for Quantum Toolchains
- 4. AdapBve CompilaBon
- Qubit/gate characteris/cs widely vary over /me. Adapt.
SLIDE 13
Major Focus Areas for Quantum Toolchains
- 5. Limited Power Budgets