Cristina Cirstoiu

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#quantum @QuantinuumQC (previously @CompSciOxford and @CQDCDT). Views are my own. On 🦋

[Cristina Cirstoiu @quantumcris]

4. We apply it to a [2,1,1] code on a 20-qubit device using syndrome extraction circuits that protect against leakage (via swaps). We also use Pauli twirling. Their combined effect is a rate of detecting errors stable in time & independent of logical input - as QEC promises.

[Cristina Cirstoiu @quantumcris]

How can we test if quantum devices satisfy the assumptions required for scalable fault tolerance?
📢Our new paper develops a method to directly estimate syndrome-resolved distributions of logical errors arising in syndrome measurements. Implementation on @QuantinuumQC H1-1👇🔗🧵

[Cristina Cirstoiu @quantumcris]

3. In contrast with physical Pauli channel estimation, our decay model incorporates the intermediate classical outcomes obtained from variable length sequences of repeated rounds of syndrome measurements.

That classical data changes with each shot, so we use a Bayesian approach

[Quantinuum @QuantinuumQC]

Today, we unveiled our roadmap to universal, fault-tolerant quantum computing by 2030.

Here’s what you need to know: https://t.co/kFNcmbbYAU

[Marco Cerezo @MvsCerezo]

🚨🚨Some colleagues recently posted a report about potential applications of quantum computers at LANL

https://t.co/xIsX13jxOs

We are asking the QIS community’s feedback and critiques on the report and would appreciate your input 🙏. Please send any feedback to [email protected]

[Cristina Cirstoiu @quantumcris]

Thanks and congrats to @mjgirling who recently got his PhD with @jenningsquantum! Always fun collaborating with you two!https://t.co/FVaI4JIL2C

[Cristina Cirstoiu @quantumcris]

New @PhysRevResearch
CUPs☕ capture quantumness via unitarity of marginal channels for which we get new info-disturbance inequalities testable with randomised benchmarking. All allowed values in a physical theory give ☕ sets incorporating no-cloning, data hiding. Matt's cool🧵👇

[Cristina Cirstoiu @quantumcris]

Looking forward to this event in Berlin next week!
Excited for the opportunity to talk about classical simulations of noisy quantum circuits and briefly touch upon connections to one of my favourite math topics at the intersection of harmonic analysis and representation theory.

[Jens Eisert @jenseisert]

"The mathematics of near-term quantum computing"

https://t.co/KWVoQBDdju

This will be the opening talk for the kick-off event of the Thematic Einstein Semester on "Mathematics for Quantum Technologies" that will take place next Tuesday (April 16, start: 2 pm) at the Technische Universität Berlin (main building). The event is dedicated to the topic "#QuantumComputing in Academia and Industry". Further talks include talk by Karl Jansen (@desy), Almudena Carrera Vazque (@IBMResearch), Andre Carvalho (@qctrlHQ), and @quantumcris (@QuantinuumQC).

Please find the complete program here:
https://t.co/RL2U8NzIY3

[Cristina Cirstoiu @quantumcris]

@AngelaCapelC @Cambridge_Uni Very cool, many congratulations @AngelaCapelC, hope to see you sometime soon! You're very welcome to visit us at the Quantinuum Cambridge office down on Hills Road once you're settled in!

[Cristina Cirstoiu @quantumcris]

@zlatko_minev Thanks! Yeah, thought I'd run into you in the following days to finish our chat, but didn't see you. Interesting questions though, but like I said don't have a complete answer yet. I'll drop you a line when we get something more concrete and/or the code gets released.

[Cristina Cirstoiu @quantumcris]

Back from an inspiring #apsmarch #apsmarchmeeting ! Huge thanks to the organisers @see_quantum and the growing DQI. I was delighted to give the invited talk of the focus session Q51 chaired timely by @zlatko_minev. A week of cool physics & overflowing auditoriums in #Minneapolis!

[Quantinuum @QuantinuumQC]

Quantinuum’s H1 generation quantum processors set an industry record for hardware performance with its H1-1 achieving a Quantum Volume of 32,768 (2^15). Learn about the technological improvements that led to the benchmark and what this means for customers: https://t.co/npYN2CMrZU

[Quantinuum @QuantinuumQC]

How do you deal with errors in your NISQ algorithms? In this paper, @QuantinuumQC @quantumcris and NPL @EnricoFontana19 introduce a framework to diagnose and mitigate the effects of noise on parametrised circuits by using classical signal processing tools. https://t.co/mnrg6hI2JM

[Cristina Cirstoiu @quantumcris]

Returning to twitter to share this recent work with my brilliant colleagues @QuantinuumQC. Check it out if you need a tool with a modular software design that facilitates combinations of error mitigation methods. Also, see how performance of QEM changed across similar devices!

[Quantinuum @QuantinuumQC]

NISQ devices are… well... noisy. Can quantum error mitigation help? In this paper, our scientists @quantumcris @compaysilas and @DanMills0 benchmark a variety of techniques using Qermit, our open source python package for making error mitigation easier.
https://t.co/zBgJqI2fki

[Cristina Cirstoiu @quantumcris]

"Robustness of Noether's Principle: Maximal Disconnects between Conservation Laws and Symmetries in Quantum Theory" is out today in @PhysRevX

Thanks to @jenningsquantum and KK for a super fun collaboration!

Talk on this work next week @QTurnWorkshop

https://t.co/2KCE7zXdee

[Cristina Cirstoiu @quantumcris]

QuAlg20 kicks off in half an hour at 10:00(GMT +1) with invited speakers @LauraMancinska and @quantum_aram and a fantastic line-up of contributed talks + poster session!
Watch Youtube livestream https://t.co/fL3Uxk1xK7 and Slack for Q&A ( instructions at https://t.co/r57y933nSF)

[Cristina Cirstoiu @quantumcris]

Our work on VFF has been published today in @Nature_NPJ

Thanks to a great collaboration with @ColesQuantum @sornborg @LCincio @IosueJoe and Zoe!

Our variational algorithm enables long-time quantum dynamical simulation with fixed circuit depth 👇🔥
https://t.co/FN92JZqWpW