QS School Summaryqs3.mit.edu/images/pdf/QS3-2017---Summary.pdf · 2017. 6. 16. · June 16, 2017...
Transcript of QS School Summaryqs3.mit.edu/images/pdf/QS3-2017---Summary.pdf · 2017. 6. 16. · June 16, 2017...
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June 16, 2017
“Scientists are close to building a quantum computer that can beat a conventional one”
Science 2016
QS3 School Summary
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Girvin: Superconducting Qubits
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IBM: Supercondcuting Qubits and QX
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Oliver: Superconducting Qubits & 3D Integration
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Pakin: Quantum Annealing
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Alicea: Topological Quantum Computing
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Shabani: Topological Qubits
https://arxiv.org/pdf/1511.01127.pdf
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Weiss: Neutral Atom Quantum Computing
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Sage: Ion Traps & 3D Integration
Multilayer stack of trap chip (not drawn to scale).
Strontium ion loading and trapping.
•Nature Communications 7, Article number: 13005 (2016)
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Monroe: Trapped Ion Quantum Informatoin
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Lyon: Spin Qubits
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Freedman: Chemistry and Quantum Computing
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Aspuru‐Guzik: Quantum Simulationhttps://quantum.nasa.gov/materials/2012‐01‐17‐B3‐Aspuru.pdf
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Manucharyan: Simulation with Superconducting Qubitshttp://online.kitp.ucsb.edu/online/synquant16/manucharyan/
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Mosca: Broad Views of Quantum Computing
https://www.youtube.com/watch?v=vWP4LF2hz80
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McQueen: Quantum Materials
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Superconducting qubits:
Theory (S. Girvin)
Experiment (V. Manucharyan)
Working prototypes demonstrated at QS3 :
IBM Quantum Experience (4 physical qubits)
D‐Wave Scott Pakin LANL
Superconducting Qubits
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Trapped Ions and neutral atoms
Trapped IonsTheoretical background and experimentDemonstration of 5 physical qubits working
Chris Monroe
Trapped ions, 3D integrationJ. Sage
Optical lattices: neutral atoms
Davis Weiss
Positive: large coherence times, higher temperatures than SC qubitsIdentical qubits
seconds of qubit (trapped atom) life timemonth of trapped ion life timenot getting lost
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Functioning of a QC IBM QX Trapped Ions
Chris Monroe published28 March 2017
• Developing algorithms• Communicating with the hardware
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Spin Qubits
Si‐ based: S. Lyons
Molecular magnetsDanna Freedman
only principle ideasbad coherence times
quantum sensors possible
Putting many qubits together to build QC
No working QC yet
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Topological Quantum Computing
Right now on the level of cool theoretical proposal
Basic theory of topological computationJ. Alicea
Not mentioned at QS3:many experimental publications about zero‐bias peak
Braiding not yet demonstrated
Topological Quantum Computing: Experiment J. Shabani: topological qubits in 1000 years?
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Materials point of view
• All functioning and close to functioning devices are based on well‐known and industrially produced materialsSiInAs, InGaAs, etcAl‐based Josephson Junctions
• Molecular magnets: ideas (unrealistic?) about making qubits Quantum sensors
• New “quantum materials”, “materials by design”:interesting propertiesnot used for QC