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Re Quantum computers will never overcome noise issues?
From: "Dave Farber" <dave () farber net>
Date: Fri, 09 Feb 2018 17:18:38 +0000
---------- Forwarded message --------- From: Joe Touch <touch () strayalpha com> Date: Fri, Feb 9, 2018 at 9:13 AM Subject: Re: [IP] Quantum computers will never overcome noise issues? To: David Jack Farber <dave () farber net> CC: ip <ip () listbox com> Hi, Dave, IMO, the biggest impediment is scale. There have been many quantum computers announced with increasing numbers of qubits - but those announcements are misleading, IMO. An 8-qubit computer solves 8-bit problems instantly only when all 8 qubits are completely entangled with each other. Large quantum computers typically involve many small quantum computers interconnected classically - and those interconnections destroy the quantum coherence and entanglement that gives quantum computing its edge. Not that I disagree with the noise issue, but even if that’s solved, there’s a scale issue too. Joe On Feb 8, 2018, at 5:06 PM, Dave Farber <dave () farber net> wrote: ---------- Forwarded message --------- From: Allen <allenpmd () gmail com> Date: Thu, Feb 8, 2018 at 1:28 PM Subject: [Cryptography] Quantum computers will never overcome noise issues? To: Crypto <cryptography () metzdowd com> Gil Kalai, a mathematician at Hebrew University, believes quantum computers will never be able to overcome noise issues. See article at: https://www.quantamagazine.org/gil-kalais-argument-against-quantum-computers-20180207/ Any thoughts on this? _______________________________________________ The cryptography mailing list cryptography () metzdowd com http://www.metzdowd.com/mailman/listinfo/cryptography This message was sent to the list address and trashed, but can be found online. <https://www.listbox.com/login/messages/view/20180209091358:73C5B7B0-0DA3-11E8-9D77-C217A9C55654/> ------------------------------------------- Archives: https://www.listbox.com/member/archive/247/=now RSS Feed: https://www.listbox.com/member/archive/rss/247/18849915-ae8fa580 Modify Your Subscription: https://www.listbox.com/member/?member_id=18849915&id_secret=18849915-aa268125 Unsubscribe Now: https://www.listbox.com/unsubscribe/?member_id=18849915&id_secret=18849915-32545cb4&post_id=20180209121900:4D57A128-0DBD-11E8-B9C7-8B5A0321E116 Powered by Listbox: http://www.listbox.com
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- Quantum computers will never overcome noise issues? Dave Farber (Feb 08)
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- Re Quantum computers will never overcome noise issues? Dave Farber (Feb 09)
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- Well worth reading and trying to understand Re Quantum computers will never overcome noise issues? Dave Farber (Feb 15)
- Re Quantum computers will never overcome noise issues? Dave Farber (Feb 09)
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