60% Water By Mass Nick Rubin

Simulation in 2nd quantization doesn't create the underlying object that is quantized.

New work in a new area for a new type of quantum embedding! Who knew!? It really is fermions all the way down arxiv.org/abs/2301.01778

Quantum faculty/researchers: Want to spend a week this summer at the QC workshop below, org'd by PCMI w/ David Gosset, Aram Harrow, Stacey Jeffery, & Thomas Vidick? Apply withing the next 2 weeks: ias.edu/pcmi/pcmi-2023… ∃ lodging/meal support and spouse/family options.

Our Google Quantum AI team has made an important step towards development of a large-scale quantum computer: building a prototype logical qubit & showing that quantum error correction makes that logical qubit better as it gets bigger. Congrats to the team! ai.googleblog.com/2023/02/suppre…

I'm speaking today at #APSMarch #APSMarchMeeting on our recent work performing resource estimates for materials simulation! Come check it out if you like quadratic improvements or Abelian symmetries meetings.aps.org/Meeting/MAR23/…

New RCS benchmarks: 2 random 2 circuit

New paper with Ryan Babbush, Dominic Berry, Rolando Somma, and Nathan Wiebe: An exponential quantum speedup for a classical problem about simulating exponentially many classical oscillators (e.g., masses connected by springs). arxiv.org/abs/2303.13012 scirate.com/arxiv/2303.130…

In our new paper, we answer two questions: can we use the full exponentially large Hilbert space up to a noise limit in random circuit sampling (RCS)? And can we see that boundary experimentally? We answer yes to both, showing a phase transition in RCS. arxiv.org/abs/2304.11119

I'm happy to welcome Stephen Jordan to our team Google Quantum AI. In addition to his many contributions to quantum algorithms research, he also maintains the amazing resource at quantumalgorithmzoo.org

📢 Save the date 📢: I'm excited to announce that the long-standing series of Strasbourg Seminars will restart next year (26-28 June) with the 2024 European Seminar on Computational Methods in Quantum Chemistry (ESCMQC-2024) in Copenhagen, Denmark. [1/4] escmqc2024.com

I am co-organizer of a workshop on Noise and Decoherence in Qubits that will be held at the Aspen Center for Physics from February 25-March 1, 2024. The deadline to apply to attend is this Friday, September 15. Please apply here aspenphys.org/physicists/win…

What can you do with QC? blog.research.google/2023/10/develo…

Are you at #ACSFall2024 next week? Interested in Molecules and Quantum? Join us at the Symposium "Mutual Chair-lift of Chemistry & Quantum Computing"! Full program at theochem.ru.nl/chairlift/ Organized with Micheline Soley (U Wisconsin-Madison) and Lawrence Cheuk (Princeton)

10 years ago Kelly et al showed bigger rep code circuits do better. The dream was to do the same for a full quantum code. This year we finally did it. arxiv.org/abs/2408.13687 has d=5 surface codes twice as good as d=3. And d=7 twice as good again, outliving the physical qubits.

Accepted and published in Quantum: Expanding the reach of quantum optimization with fermionic embeddings by Andrew Zhao and Nicholas C. Rubin doi.org/10.22331/q-202…

arxiv.org/abs/2409.04643

arxiv.org/abs/2409.11748

Been working on "Magic state cultivation: growing T states as cheap as CNOT gates" all year. It's finally out: arxiv.org/abs/2409.17595 The reign of the T gate is coming to an end. It's now nearly the cost of a lattice surgery CNOT gate, and I bet there's more improvements yet.

New research presents a complete algorithm for ground-state energy estimation, addressing the challenge of imperfect initial state preparation. We detail more efficient matrix-product-state (MPS) preparation and improved energy sampling methods → goo.gle/4dejcUP