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description=Google Quantum AI is a superconducting quantum computing company in the United States. Founded 2013. 2 logical qubits, 105 physical qubits.;
author=Hartmut Neven (Founder, VP Engineering), John Martinis (Former Hardware Lead, 2014-2020);

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uotes leaderboard public upcoming quantum companies top funded companies ranked by total funding raised top investors most active vcs and corporate investors investors vcs investors quantum focused venture capital incubators accelerators startup programs acquisitions m a tracker and spac deals analytics funding flow where the quantum money goes dashboard interactive industry analytics industry insights market analysis trends industry stats charts analytics stack visualize ecosystem map interactive industry infographic market map quantum market segment overview partnership network relationship visualization network graph technology relationship graph explain quantum stack full technology stack overview quantum error correction qec codes fault tolerance roadmap photonic architectures cv dv mbqc and t centre explainer timeline key events by year 2019 to 2026 research consortia programmes global quantum consortia alliances periodic table companies as elements track all trackers qubit records fidelity programmes funding trackers hub all trackers every live number on one page qubits physical qubit record 2 310 qubits matriq logical qubit record 4 error corrected logical qubits zhejiang university quantum computing lab logical qubit tracker counted and uncounted claims and the rules gate fidelity milestones 99 99 best two qubit gate qubit evidence the source behind every figure encoding overhead physical qubits per logical qubit programmes darpa qbi 11 companies in stage b chips act awards 5 of 9 final awards signed roadmaps what each company promised by year fault tolerant roadmap the steps to a useful corrected machine money investment tracker 113 funding deals capital markets 102 listed companies quantum stocks live prices and quotes acquisitions m a and spac deals industry patent tracker quantum ip by company with the newest filings government labs what each country s public labs publish state of quantum the dated industry monitor map about about about entangled future the dataset the largest quantum database on the planet free how to cite citation formats dated to the data methodology how records are found and checked claim your profile update your company listing accessibility accessibility statement security start here quantum safe cryptography what breaks what replaces it and when harvest now decrypt later why encrypted data is already at risk migration roadmap moving an estate to post quantum crypto nist standards ml kem ml dsa and slh dsa qkd vs pqc two answers to the same threat companies post quantum cryptography 202 companies building pqc pqc algorithms the standardised algorithms compared quantum key distribution 139 companies building qkd random number generation 42 companies building qrng search k subscribe search companies and pages esc type to search to move enter to open explore trackers dashboard api sensors security learn compare jobs news events guides glossary countries directory all companies new startups software companies consultancies usa companies uk companies china quantum all countries world map research labs universities enterprise adopters sectors quantum hubs government programs consortia hardware hardware overview qpu manufacturers control systems cryogenics cloud services components cloud providers photonic quantum sensors sensing overview magnetometers gravimeters atomic clocks navigation quantum imaging investment capital markets investment tracker quantum stocks leaderboard top funded companies top investors vcs investors incubators acquisitions funding flow dashboard industry insights industry stats stack ecosystem map market map partnership network network graph quantum stack quantum error correction photonic architectures timeline consortia programmes periodic table all trackers trackers all trackers physical qubit record logical qubit record logical qubit tracker gate fidelity milestones qubit evidence encoding overhead darpa qbi chips act awards roadmaps fault tolerant roadmap investment tracker capital markets quantum stocks acquisitions patent tracker government labs state of quantum map about about the dataset how to cite methodology claim your profile accessibility learn learn articles quantum concepts quantum glossary quantum dictionary use cases guides security quantum safe cryptography harvest now decrypt later migration roadmap nist standards qkd vs pqc post quantum cryptography pqc algorithms quantum key distribution random number generation compare jobs news latest news newsroom events conferences subscribe to newsletter home companies google quantum ai google quantum ai santa barbara united states est 2013 commercial google quantum ai builds superconducting quantum chips led by the 105 qubit willow and since march 2026 has run a neutral atom program in boulder colorado its open source tools such as cirq and stim are free for anyone 105 physical qubits 2 logical qubits 99 88 2q fidelity visit website overview technology software partnerships news faq related share this profile google quantum ai at a glance founded 2013 headquarters santa barbara united states status private technology superconducting 2q fidelity 99 88 patent families 249 newest filing 2026 04 15 enterprise users 2 partnerships 6 investors 1 about google quantum ai google quantum ai is google s quantum computing group founded by hartmut neven and based at a campus in santa barbara that brings together its quantum data center chip fabrication facility and research lab you can take a virtual tour of the campus online and its open source software including cirq for writing quantum circuits and stim for simulating error correction is free for anyone to download the group now works on two kinds of quantum hardware at once the first is superconducting built around willow a 105 qubit processor released in december 2024 and google s flagship willow showed quantum error correction working below threshold with the surface code which google describes as a first demonstrating 1 logical qubit and 99 88 two qubit gate fidelity it also solved a benchmark problem in 5 minutes that google estimates would take a classical supercomputer 10 septillion years google aims for fault tolerant quantum computing by roughly 2029 the second is a neutral atom platform announced in march 2026 professor adam kaufman of jila and cu boulder leads a new team in boulder colorado working on three fronts quantum error correction for atomic arrays modelling and simulation and experimental hardware google s thinking is that neutral atoms can scale to very large qubit counts which complements willow s strengths in circuit depth and gate speed the research output is steady in october 2025 google published the quantum echoes algorithm in nature which it describes as the first verifiable quantum advantage on real hardware it ran 13 000 times faster than the best classical algorithm on the out of time order correlator problem on willow with possible uses in drug discovery through modelling how molecules behave in december 2025 it posted a preprint arxiv 2512 13908 on magic state cultivation that reached a state fidelity of 0 9999 1 a 40 fold error reduction while keeping only 8 of attempts post selected and in march 2026 it reported a 20 fold reduction in the resources needed to break current cryptographic standards backing a 2029 target for moving to post quantum cryptography in august 2025 it published work on surface codes on a hexagonal qubit grid arxiv 2508 08116 that tolerates fabrication defects so a failed component costs only a one unit drop in circuit distance in november 2024 google deepmind and google quantum ai published alphaqubit in nature a transformer based neural network decoder for quantum error correction that outperforms conventional decoders google has also been buying and funding in october 2025 it acquired atlantic quantum for its fluxonium expertise and embedded cryogenic control technology in may 2026 it launched repliqa the research program at the intersection of life sciences and quantum ai committing 10 million across five universities arizona uc san diego uc santa barbara harvard and mit to develop quantum sensors and algorithms for modelling molecular interactions relevant to drug discovery anyone curious about how error correction works can take its free coursera course hands on quantum error correction with google quantum ai recent developments researchers at google quantum ai have developed a new heuristic approach to accelerate matrix product state mps simulations allowing for estimation of expectation values without the traditionally exponential resource demand of storing the full wave functi quantumzeitgeist com 2026 09 09 google quantum ai researchers have determined that breaking the core cryptography of various cryptocurrencies secured by the secp256k1 curve may require as few as 1200 logical qubits and 90 million toffoli gates a significantly lower threshold than previou quantumzeitgeist com 2026 08 22 king s college london researchers gained access to google s willow quantum computer chip quantumzeitgeist com 2026 05 28 google quantum ai researchers made progress developing a real time decoding system for quantum computers quantumzeitgeist com 2026 04 16 google quantum ai added a neutral atom hardware programme led by dr adam kaufman based in boulder colorado and drawing on the amo physics ecosystem around cu boulder jila and nist boulder pursued alongside its superconducting work quantumzeitgeist com 2026 03 24 google quantum ai reported an average surface code logical error per cycle of 7 72e 4 on willow using a reinforcement learning agent that steers the processor s control parameters during error correction the agent does not decode the work is a preprint arxiv 2511 08493 november 2025 arxiv org 2025 11 google quantum ai demonstrated a quantum speedup using the echoes algorithm on its willow processor quantumzeitgeist com 2025 10 22 you ve reached the limit of free company profiles everything here is still free all we ask is that you sign up for our newsletter which helps us keep researching every quantum company sign up free and keep reading already a subscriber enter your key to unlock everything unlock categories superconducting qubits quantum processors quantum hardware quantum algorithms quantum simulation quantum error correction quantum cloud quantum ai quantum software industry context superconducting qubits superconducting qubit technology uses tiny circuits cooled to near absolute zero that exhibit quantum behavior quantum processors quantum processor companies design and fabricate the qpus at the heart of quantum computers they compete mainly on qubit count and gate fidelity google quantum ai quantum hardware 105 physical qubits 2 error corrected logical qubits demonstrated dec 2024 paper how we count 99 88 2 qubit gate fidelity surface code qec method 99 97 1 qubit gate fidelity 99 50 readout fidelity milestones 1 000 000 pq 1 000 lq planned useful error corrected quantum computer 1m physical qubits 1 000 logical qubits target 10 6 logical error rate 100m quantum operations 2029 planned neutral atom program google prof adam kaufman boulder co 1 000 10 000 atoms 99 9 single qubit fidelity 99 7 two qubit fidelity superconducting for circuit depth neutral atoms for qubit count 2027 1 000 pq 10 lq planned milestone 3 long lived logical qubit 1 000 physical qubits per logical qubit target logical error rate 10 6 per cycle from current 10 3 with willow 10 logical qubits 2027 dual modality added neutral atom quantum computing program boulder co prof adam kaufman leads superconducting for depth neutral atoms for qubit count quantumzeitgeist com official 2026 03 color code scaled from distance 3 to 5 lambda 1 56 with transversal clifford gates magic state injection and lattice surgery teleportation between color codes nature may 2025 arxiv org peer reviewed 2025 05 32 pq 2 lq 2 error corrected logical qubits held at once colour code lattice surgery distance 3 with no runs discarded two logical qubits used to teleport one state fidelity reported for the output qubit which depends on decoding both decoded offline doi org peer reviewed 2024 12 105 pq 1 lq 35 willow 105q superconducting below threshold qec surface code 1 verified logical qubit logical error rate 0 143 per cycle d 7 t1 improved 20 68 microseconds first exponential error suppression with lattice size 99 88 2q fidelity peer reviewed paper nature 638 920 926 2025 doi 10 1038 s41586 024 08449 y the distance 7 memory used 101 of willow s 105 qubits with lambda 2 14 and real time decoding at distance 5 arxiv org peer reviewed 2024 12 70 pq sycamore upgraded to 70 qubits for a random circuit sampling experiment published july 2023 completing in minutes a task google estimated at roughly 47 years for the fastest classical supercomputers nature com peer reviewed 2023 07 logical qubits 2 error corrected logical qubits colour code lattice surgery distance 3 no runs discarded nature 645 614 619 2025 logical qubit source doi org peer reviewed hardware source blog google google quantum ai software and frameworks open source and sdks tesseract decoder 2025 search based decoder for quantum error correction qec written in c and python open source apache 2 0 qualtran 2022 qᴜᴀʟᴛʀᴀɴ is a python library for expressing and analyzing fault tolerant quantum algorithms open source apache 2 0 stim 2021 a fast stabilizer circuit library open source apache 2 0 recirq 2020 python modules for quantum computing applications and experiments using cirq research using cirq open source apache 2 0 tensorflow quantum 2020 an open source python framework for hybrid quantum classical machine learning built on tensorflow and cirq open source apache 2 0 qsim 2020 fast c and python library for state vector simulation of quantum circuits open source apache 2 0 cirq 2018 open source python framework for writing and running quantum circuits open source apache 2 0 openfermion 2017 python package for compiling and analyzing quantum algorithms to simulate electronic structures open source apache 2 0 openfermion pyscf 2017 openfermion plugin to interface with the electronic structure package pyscf open source apache 2 0 hardware and services hands on quantum error correction with google quantum ai a free coursera course taught by austin fowler in which you build the surface code yourself and simulate it with google s stim and crumble tools willow 2024 a 105 qubit superconducting quantum chip google says it was the first system to run surface code error correction below threshold cutting the error rate in half at each step from a 3x3 to a 5x5 to a 7x7 grid of encoded qubits access is through an early access program for selected research partners 105 physical qubits limited access hardware gallery google s willow quantum chip announced december 2024 the 105 qubit processor achieved below threshold quantum error correction meaning errors decrease as the system scales a key milestone o...