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Thursday, November 10, 2022
Tropical Storm Nicole hits Florida and Artemis 1 moon rocket
Seminars Digest, Vol 48, Issue 2
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Today's Topics:
1. Fwd: [IIP-UFRN] Virtual seminar with Claudio Chamon (fwd)
(Serge Krashakov)
----------------------------------------------------------------------
Message: 1
Date: Wed, 9 Nov 2022 13:02:36 +0300
From: Serge Krashakov <sakr@itp.ac.ru>
To: staff@itp.ac.ru
Cc: students@itp.ac.ru, seminars@itp.ac.ru
Subject: [Landau ITP Seminars] Fwd: [IIP-UFRN] Virtual seminar with
Claudio Chamon (fwd)
Message-ID: <46d44547-f596-a5b4-d073-852bb842ae22@itp.ac.ru>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Уважаемые коллеги,
Пересылаю вам письмо А.А. Старобинского.
Возможно, кому-то будет интересно принять участие в этом семинаре.
С. Крашаков
-------- Перенаправленное сообщение --------
Тема: Re: [IIP-UFRN] Virtual seminar with Claudio Chamon (fwd)
Дата: Wed, 9 Nov 2022 12:54:33 +0300 (MSK)
От: Alexei Starobinsky <alstar@itp.ac.ru>
Кому: Serge Krashakov <sakr@itp.ac.ru>
We are happy to invite you to our next online seminar on November 14, at
02:00 PM Natal time (GMT-3).
SPEAKER: Claudio Chamon, Boston University
TITLE: Quantum statistical mechanics of encryption: reaching the speed
limit of ciphers
Please visit the IIP website
<https://www.iip.ufrn.br/talksdetail.php?inf===gTUlFN>
for more information and for the registration link.
>>
>> ---------- Forwarded message ----------
>> Date: Tue, 8 Nov 2022 19:25:42 +0000
>> From: IIP <outreach@iip.ufrn.br>
>> To: alstar@itp.ac.ru
>> Subject: [IIP-UFRN] Virtual seminar with Claudio Chamon
>>
>> [[IIP-UFRN] Virtual seminar with Claudio Chamon next Monday
>>
>>
>> Dear colleague,
>>
>> We are happy to invite you to our next online seminar on November
>> 14, at
>> 02:00 PM Natal time (GMT-3).
>>
>> TITLE: Quantum statistical mechanics of encryption: reaching the
>> speed limit
>> of ciphers
>>
>> SPEAKER: Claudio Chamon, Boston University
>>
>> ABSTRACT: We examine the scrambling speed of random reversible
>> classical
>> circuits with long-range gates. In particular, we ask the following
>> question: how short can a reversible circuit be to represent ciphers
>> that
>> could possibly be indistinguishable from a random permutation if
>> probed with
>> only a polynomial number of queries. To address this question, we cast
>> encryption by block ciphers in terms of operator spreading in a dual
>> space
>> of Pauli strings, a formulation which allows us to characterize
>> classical
>> ciphers by using tools well known in the analysis of quantum many-body
>> systems. We connect plaintext and ciphertext attacks to out-of-time
>> order
>> correlators (OTOCs) and quantify the quality of ciphers using
>> measures of
>> delocalization in string space such as participation ratios and
>> corresponding entropies obtained from the wave function amplitudes in
>> string
>> space. These results carry over to random quantum circuits and inform
>> us on
>> the structure required in order that such circuits scramble as fast
>> as a
>> Black Hole -- and yet to a much stricter (cryptographic) standard! More
>> interesting from a practical point of view is that such short ciphers
>> enable
>> an efficient (polynomial) scheme for computing directly on encrypted
>> data, a
>> physics-inspired alternative to homomorphic encryption.
>>
>>
>> The seminar will be held online via Zoom platform. To receive the access
>> link please fill a short registration form below:
>>
>> [CLICK HERE TO FILL OUT THE FORM]
>>
>> Please visit the IIP website for more information.
>>
>> The IIP is a research institute with an international vocation,
>> permanently
>> facing the frontier areas of theoretical physics. Its mission is to
>> intensify the exchange of scientific knowledge with the international
>> community and, in particular with the Latin American community, being
>> a pole
>> unifying national strategic areas of theoretical physics.
>>
>> Visit our social media
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>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> This email was sent to alstar@itp.ac.ru
>> why did I get this? unsubscribe from this list update
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>> International Institute of Physics · 1613 · Avenida Senador Salgado
>> Filho,
>> 59078, Cp 970, Lagoa Nova · Natal, Rn 59078-970 · Brazil
>>
>>
>> [open.php?u=9616ebc472ad64be5985551c8&id=6217447671&e=f5cdb840a7]
>
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