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MarketScreener Homepage  >  Equities  >  Nasdaq  >  Microsoft Corporation    MSFT

MICROSOFT CORPORATION

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Microsoft : and Copenhagen University researchers create new kind of quantum device

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09/09/2020 | 06:35pm EDT

In a paper published this week in Nature Physics, a team of researchers from Microsoft and Copenhagen University demonstrated a novel heterostructure with remarkable properties. A heterostructure is, roughly, a device formed out of a sandwich between different solid materials. When the interfaces between the different materials are clean, the device can have properties that would be difficult, if not impossible to obtain in any single material. But when the interfaces contain impurities, the device may capture the worst, rather than the best properties, of thematerialscomprisingit.

The device described in the new Microsoft-Copenhagen University paper is a heterostructure between a semiconductor, a superconductor, and a ferromagnet. The three materials and the interfaces between them were fabricated within an ultra-high-vacuum molecular beam epitaxy (MBE) machine, made possible bythe compatibility between the growth and fabrication conditionsfor the three materials-europium sulfide (ferromagnet), aluminum (superconductor), and indium arsenide (semiconductor)-leading to extremely flat and clean interfaces.

The authors showed that the device has gate-tunable superconductivity andferromagnetism induced in and coexisting in the semiconductor. These two phenomena, ordinarily antithetical, are able to peacefully coexist due to a property of indium arsenidecalled spin-orbit coupling. In fact, when such coexistence occurs in a quantum wire deviceof the type fabricated and measured by the Microsoft-Copenhagen University team, Majorana zero modes can result,enabling such a wire to be an integral component of a topological quantum computer. The new Nature physics paper shows data that is consistent with the presence of Majorana zero modes intheir devices.

Previous deviceswithout a ferromagnetic layer have exhibited similar signatures upon the application of a large magnetic field, in a direction aligned with the wire. But such a large field brings problems of its own, including the need to align all of the wires in a topological quantum computer to fairly high accuracy,as well as the field's possible effect on other components higher in the stack. In thedevices created by the Microsoft-Copenhagen University team, the magnetic moment due to the ferromagnetic layer is highly localized and automatically aligned with a preferred crystal axis.

Microsoft's Quantum program has made a big bet that new methods for the design, fabrication, and measurement of these types of novel heterostructures will be essential if we are to build a commercial-scale quantum computer. While somemight arguethat tools invented for classical devices will be sufficient to produce quantum devices, Microsoft and Copenhagen University have already shown in previous workthat long-envisioned, but never previously realized,combinations of superconducting and semiconducting elements could be grown and fabricated via MBE and probed by quantum transport, overturning conventional wisdom about what is possible.

Thus, this work, hasintrinsic interest as a new device type with a unique mix of featuresandis also a significant step towards the creation of simpler topological quantum computing systems. It is also another example of how Microsoft and its partners, such as Copenhagen University, are reinventingthe science and engineering of quantum devices.

Disclaimer

Microsoft Corporation published this content on 09 September 2020 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 09 September 2020 21:34:03 UTC


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Financials (USD)
Sales 2021 157 B - -
Net income 2021 49 091 M - -
Net cash 2021 82 379 M - -
P/E ratio 2021 33,6x
Yield 2021 1,01%
Capitalization 1 635 B 1 635 B -
EV / Sales 2021 9,90x
EV / Sales 2022 8,84x
Nbr of Employees 163 000
Free-Float 99,9%
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Satya Nadella Chief Executive Officer & Non-Independent Director
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