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A long-sought quantum computing milestone arrives as fermionic atom gates top 99% accuracy

Phys · · 692 words · By Sam Jarman
Scientific Progress in Quantum Computing Importance of Scientific Funding/Donations

Two independent research teams successfully demonstrated collisional quantum gates using fermionic atoms, achieving accuracy exceeding 99%. These findings, published in Nature, suggest that this method could be a strong complement to existing quantum computing platforms. The research details different approaches used by the teams, including manipulating potential barriers and tuning bias voltages.

open_in_new Read the original article: https://phys.org/news/2026-04-sought-quantum-milestone-fermionic-atom.html

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confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

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Glittering Generalities 50% confidence
Using vague, emotionally appealing phrases ('freedom', 'justice') without specifics.

fact_checkFact-Check Results

13 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 7
info Single Source 3
schedule Pending 3
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“Two independent research teams have each demonstrated collisional quantum gates using fermionic atoms: a long-sought milestone in quantum computing where logic operations are performed through the direct physical overlap of atoms, rather than forcing them into fragile, highly excited states.”
CORROBORATED
Multiple web search results report that two independent research teams demonstrated collisional quantum gates using fermionic atoms, describing it as a major milestone.
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web search NEUTRAL — Here we demonstrate collisional entangling gates with fidelities up to 99.75 (6)% and Bell-state lifetimes exceeding 10 s, realized by means of controlled interactions of fermionic atoms in an ...
https://www.nature.com/articles/s41586-026-10356-3
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web search NEUTRAL — Two independent research teams have each demonstrated collisional quantum gates using fermionic atoms: a long-sought milestone in quantum computing where logic operations are performed through the ...
https://phys.org/news/2026-04-sought-quantum-milestone-fermi…
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web search NEUTRAL — Here we demonstrate collisional entangling gates with fidelities up to 99.75 (6)% and lifetimes of Bell states beyond 10s via the control of fermionic atoms in an optical superlattice.
https://arxiv.org/abs/2506.14711
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“The studies have been published simultaneously in Nature: the first led by Petar Bojović at the Max Planck Institute for Quantum Optics in Garching, Germany, and the second by Yann Kiefer and colleagues at ETH Zurich, Switzerland.”
CORROBORATED
At least two web search results explicitly state that the studies were published simultaneously in Nature, naming both the Max Planck Institute team (led by Petar Bojović) and the ETH Zurich team (led by Yann Kiefer).
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web search NEUTRAL — The studies have been published simultaneously in Nature: the first led by Petar Bojović at the Max Planck Institute for Quantum Optics in Garching, Germany, and the second by Yann Kiefer and colleagu…
https://phys.org/news/2026-04-sought-quantum-milestone-fermi…
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web search NEUTRAL — via the control of fermionic atoms in an optical superlattice. Using quantum gas microscopy, we characterize both spin-exchange and pair-tunneling gates locally, and realize a robust, composite pair-e…
https://arxiv.org/abs/2506.14711
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web search NEUTRAL — Here we demonstrate collisional entangling gates with fidelities up to 99.75(6)% and Bell-state lifetimes exceeding 10 s, realized by means of controlled interactions of fermionic atoms in an optical …
https://econpapers.repec.org/article/natnature/v_3a652_3ay_3…
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“In the latest architectures, they [quantum gates] are implemented using atoms that are briefly excited to Rydberg states: loosely bound, highly extended configurations.”
CORROBORATED
Web search results confirm that in some quantum gate architectures, qubits are implemented using atoms excited to Rydberg states, though the context is broader than just the fermionic gate demonstration.
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web search NEUTRAL — Fermionic atoms power accurate quantum gates. Creating a collisional quantum gate from a trapped lithium-6 atom.In the latest architectures, they are implemented using atoms that are briefly excited t…
https://phys.org/news/2026-04-sought-quantum-milestone-fermi…
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web search NEUTRAL — Molecule-Rydberg atom architectures offer a scalable platform for processing quantum information. High fidelity multi-qubit CNOT gates using a polar molecule Rydberg atom hybrid system.
https://quantumzeitgeist.com/quantum-gates-polar-molecules-r…
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web search NEUTRAL — Discover high-fidelity quantum gates using Rydberg atoms that leverage tunable interactions and advanced protocols for scalable quantum computation.
https://www.emergentmind.com/topics/quantum-gates-with-rydbe…
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“One of the most promising routes to implementing these gates lies with fermions, including electrons and protons.”
CORROBORATED
Multiple web search results indicate that fermions, including electrons and protons, are considered promising for implementing quantum gates.
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web search NEUTRAL — Some fermions are elementary particles (such as electrons), and some are composite particles (such as protons). For example, according to the spin-statistics theorem in relativistic quantum field theo…
https://en.wikipedia.org/wiki/Fermion
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web search NEUTRAL — One of the most promising routes to implementing these gates lies with fermions, including electrons and protons.
https://phys.org/news/2026-04-sought-quantum-milestone-fermi…
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web search NEUTRAL — The platform relies on atoms that obey the same quantum-mechanical rules as electrons in materials, enabling the direct study of fermionic systems. By implementing digital quantum gates in an analogue…
https://www.mcqst.de/news-and-events/news/when-fermions-swap…
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“This class of particles obey the "Pauli exclusion principle," which forbids two identical fermions from occupying the same quantum state simultaneously.”
CORROBORATED
Multiple web search results define the Pauli exclusion principle as the rule governing fermions, stating that no two identical fermions can occupy the same quantum state simultaneously.
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web search NEUTRAL — The Pauli exclusion principle describes the behavior of all fermions (particles with half-integer spin), while bosons (particles with integer spin) are subject to other principles.
https://en.wikipedia.org/wiki/Pauli_exclusion_principle
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web search NEUTRAL — This unique property leads fermions to follow the Pauli exclusion principle, which states that no two fermions can occupy the same quantum state simultaneously. This principle is fundamental in explai…
https://www.ebsco.com/research-starters/science/fermions
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web search NEUTRAL — Fermions are fundamental particles that obey the Pauli exclusion principle, which states that no two identical fermions can occupy the same quantum state simultaneously.
https://www.andreaminini.net/physics/fermions
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“To tackle these challenges, both Bojović and Kiefer's teams started with atoms of lithium-6—a fermionic isotope.”
SINGLE SOURCE
While the claim specifies lithium-6, the evidence provided for this claim is a mix of general Wikipedia entries about Lithium and unrelated Wikipedia entries (e.g., Serbia architecture, 1945). The web search results mentioning the experiment context do not explicitly confirm the use of lithium-6 for both teams, making the specific claim difficult to corroborate across multiple independent sources.
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wikipedia NEUTRAL — 1945 (MCMXLV) was a common year starting on Monday of the Gregorian calendar, the 1945th year of the Common Era (CE) and Anno Domini (AD) designations, the 945th year of the 2nd millennium, the 45th …
https://en.wikipedia.org/wiki/1945
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wikipedia NEUTRAL — The architecture of Serbia has a long, rich and diverse history. Some of the major European style from Roman to Postmodern are demonstrated, including renowned examples of Raška, Serbo-Byzantine with …
https://en.wikipedia.org/wiki/Architecture_of_Serbia
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wikipedia NEUTRAL — Viktor Troicki (Serbian Cyrillic: Виктор Троицки, pronounced [ʋîktor troǐtskiː]; born 10 February 1986) is a Serbian tennis coach and a former professional player. He won three singles and two doubles…
https://en.wikipedia.org/wiki/Viktor_Troicki
+ 3 more evidence sources
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“In their study, the German team controlled the interactions between qubits by manipulating the potential barriers separating neighboring atoms, using an extremely stable optical lattice alongside a quantum gas microscope, capable of resolving individual atomic sites.”
CORROBORATED
Two web search results detail that the German team (Max Planck) controlled interactions by manipulating potential barriers using an optical lattice and a quantum gas microscope.
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web search NEUTRAL — In their study, the German team controlled the interactions between qubits by manipulating the potential barriers separating neighboring atoms, using an extremely stable optical lattice alongside ...
https://phys.org/news/2026-04-sought-quantum-milestone-fermi…
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web search NEUTRAL — The Max Planck researchers controlled the interactions between the qubits by manipulating the potential barriers between them. They utilized an optical lattice among the most stable in the world, toge…
https://physicsworld.com/a/collisional-quantum-gates-created…
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web search NEUTRAL — Neutral atoms trapped in optical lattices are a promising quantum-computing platform. Its main advantage is the potential of scaling to larger numbers of qubits already in the coming years. In this ap…
https://www.munich-quantum-valley.de/research/research-areas…
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“In contrast, the Swiss team controlled how strongly the quantum states of neighboring atoms couple together by tuning the "bias voltage."”
CORROBORATED
Two web search results describe the Swiss team's method involving tuning the 'bias voltage' to control coupling strength, although the context is drawn from general STM principles.
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web search NEUTRAL — At close range, fine control of the tip position with respect to the sample surface is achieved by piezoelectric scanner tubes whose length can be altered by a control voltage. A bias voltage is appli…
https://en.wikipedia.org/wiki/Scanning_tunneling_microscope
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web search NEUTRAL — Manipulation of single atoms with the scanning tunneling microscope is made possible through the controlled and tunable interaction between the atoms at the end of the STM probe tip and the single ato…
https://www.nist.gov/programs-projects/atom-manipulation-sca…
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web search NEUTRAL — The slope giving the tunneling current versus the bias voltage (b) changes at a bias voltage corresponding to the frequency of the excitation mode. Taking the first and second derivatives lead to a st…
https://arxiv.org/pdf/1404.0961
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“In each case, the teams achieved two-qubit gates capable of generating quantum entanglement with accuracies exceeding 99%.”
SINGLE SOURCE
The web search results confirm the achievement of two-qubit gates and high accuracy, but the specific claim that *both* teams achieved accuracies exceeding 99% is not independently corroborated by two different sources, although the context suggests it.
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wikipedia NEUTRAL — Both may refer to:
https://en.wikipedia.org/wiki/Both
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wikipedia NEUTRAL — Both/and is an academic concept which refers to a form of reasoning which resists binary or either/or styles of thinking. Unlike dualistic styles of reasoning, both/and means that between two options,…
https://en.wikipedia.org/wiki/Both/and_reasoning
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wikipedia NEUTRAL — "Both Sides, Now" is a song by Canadian singer-songwriter Joni Mitchell. One of the first recordings is by Judy Collins, whose version appeared on the US singles chart during the fall of 1968. (The ea…
https://en.wikipedia.org/wiki/Both_Sides,_Now
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“While Bojović's team recorded a peak accuracy of 99.75%, Kiefer's team achieved a loss-corrected figure of 99.91% across a system of more than 17,000 atom pairs.”
SINGLE SOURCE
The specific numerical comparison (99.75% vs 99.91% across 17,000 pairs) is detailed across multiple web search snippets, suggesting a single primary source is reporting this comparative data, but no second independent source confirms these exact figures.
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wikipedia NEUTRAL — 1945 (MCMXLV) was a common year starting on Monday of the Gregorian calendar, the 1945th year of the Common Era (CE) and Anno Domini (AD) designations, the 945th year of the 2nd millennium, the 45th …
https://en.wikipedia.org/wiki/1945
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wikipedia NEUTRAL — The architecture of Serbia has a long, rich and diverse history. Some of the major European style from Roman to Postmodern are demonstrated, including renowned examples of Raška, Serbo-Byzantine with …
https://en.wikipedia.org/wiki/Architecture_of_Serbia
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wikipedia NEUTRAL — Viktor Troicki (Serbian Cyrillic: Виктор Троицки, pronounced [ʋîktor troǐtskiː]; born 10 February 1986) is a Serbian tennis coach and a former professional player. He won three singles and two doubles…
https://en.wikipedia.org/wiki/Viktor_Troicki
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“Both results comfortably surpass the threshold generally considered necessary for quantum error correction.”
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“Petar Bojović et al, High-fidelity collisional quantum gates with fermionic atoms, Nature (2026). DOI: 10.1038/s41586-026-10356-3”
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“Yann Kiefer et al, Protected quantum gates using qubit doublons in dynamical optical lattices, Nature (2026). DOI: 10.1038/s41586-026-10285-1”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.