We are the Haeffner Lab at UC Berkeley. We trap ions to investigate various aspects of quantum physics and quantum information.
Berkeley, CA
Joined June 2017
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Berkeley ions retweeted
Definitely one of the coolest papers in the last several years from our friends at @Berkeley_ions.
A "tin-can telephone" connects two ions through a metal wire, offering a system for remote ion cooling
Letter: go.aps.org/3ryqzR5
Viewpoint: go.aps.org/3B3AYHm
Berkeley ions retweeted
Are trapped electrons feasible for quantum computers? @Berkeley_ions (with a @TylerSutherl hand) finds out! 🧐
arxiv.org/abs/2112.04034
Berkeley ions retweeted
In our second Review, Kenneth Brown (@kenbrownquantum), John Chiaverini, Jeremy Sage & Hartmut Häffner discuss materials opportunities to improve trapped-ion #qubits: go.nature.com/2PyprvT @MITQuanta @Berkeley_ions
Berkeley ions retweeted
Our paper on using trapped electrons as charged particle detectors is on the @PhysRevLett front page :) Details here: journals.aps.org/prl/abstrac…
Berkeley ions retweeted
I've spent the last week non-stop thinking about this awesome experiment from @Berkeley_ions.
In it, they couple the motion of two ions by using a floating electrode to mediate the charge.
This could allow for remote cooling and even gates!
So cool😍
arxiv.org/abs/2107.00851
Berkeley ions retweeted
Really excited to see this results from @Berkeley_ions on coupling two ion traps with a wire on the arxiv: arxiv.org/abs/2107.00851 These experiment started in 2007 @iqoqi, talk about perseverance ⏲️
Berkeley ions retweeted
Ever seen two ions rotating around each other? Now you have!
From the archives: Tired of controlling the quantum vibrational motion of Paul-trapped ion strings? Try quantum *rotational* motion!
journals.aps.org/prl/abstrac…
ft. @QuantumGlikin, @ucr_amo
Berkeley ions retweeted
How do you explain quantum computing to your dog, or to other important beings in your life? Check out this series of stock explanations by @Liv_Lanes and @RyanFMandelbaum. Spoiler: we did not successfully teach a dog quantum computing. qisk.it/3v2FHEE
Berkeley ions retweeted
99.94% two qubit fidelity (prepping a bell state in 35us) woth #TrappedIons from @GeorgiaTech
They used laser based gate and also an 8.5K ion trap. Interstingly, it looks like they could have gone warmer and still have had "similar" fidelities🧐.
arxiv.org/abs/2105.05828
Berkeley ions retweeted
The physicists at @UDelaware have made a portal with all your favourite ions and transitions in one place!
They're still expanding it and would appreciate input from the community.
Ion trappers - step up!
www1.udel.edu/atom/
Berkeley ions retweeted
Happy #StarWarsDay2021, everyone! May the electromagnetic force be with you. 😉
#quantumcomputing #iontrap #maythe4thbewithyou
ALT May the 4th be with you!
Berkeley ions retweeted
Just completed our first #quantum t-shirt swap with @Berkeley_ions! Also, thank you for the action shot @QuantumGlikin 😎
Berkeley ions retweeted
Our work describing how trapped electrons are sensitive detectors of charges -- including millicharged dark matter -- is now up on the arxiv. TL;DR version: electrons can be both light and cold, making them very sensitive indeed arxiv.org/abs/2104.05737
Berkeley ions retweeted
Congrats everyone at Honeywell!
nature.com/articles/s41586-0…
Berkeley ions retweeted
Ion traps and materials review paper with @MitQuanta and @Berkeley_ions now published in @NatRevMater .
Here is a link anyone can access. rdcu.be/chulO
Berkeley ions retweeted
This is a remarkable work on one of ion traps biggest enemy, surface noise. By @Berkeley_ions: arxiv.org/abs/2103.04482 They give a fascinating look into the microscopic processes of surface noise by applying ion milling and thermal annealing. Smoother surfaces show higher noise!
Berkeley ions retweeted
We’re THRILLED to announce that IonQ will become the first public quantum computer company through a merger with @dMYTech, with an expected valuation of $2B! ionq.com/news/march-08-2021-…
Berkeley ions retweeted
The #ion trap #quantum #computer @honeywell according to their website has reached a quantum volume of 2^9 = 512, corresponding to 9 qubits interacting coherently according to that metric. Nice!
Honeywell Sets New Record For Quantum Computing Performance honeywell.com/us/en/news/202… – at Zurich, Switzerland