Cornelius Hempel

A thread about conical intersections. When the pandemic started, all the experimentalists, including Jacob Whitlow and Zhubing Jia, were kicked out of lab. I suggested that Jacob and Gloria think about whether or not we could simulate conical intersections with our ion traps.

It’s been a few year since @IvanKassal and I talked about CIs over lunch and I moved to🇨🇭in the meantime. Now, with the hard work of many talented people, this analog QSim finally turned into reality. I am very proud of the teams @Sydney_Science @ARC_EQUS that made it happen!

Only one more week until the #Quantum Industry Day in Switzerland, proudly supported by @ETHQuantumCntr It is not too late to sign up for the in-person event #QuantumComputing #QuantumSensing #QuantumCommunication and more, go to qidis22.b2match.io

Another exciting result from our very fruitful collaboration on simulating chemical dynamics between @SydneyChemistry @IvanKassal’s group and the quantum control laboratory @sydney_physics !

🚨 Job Alert 🚨 We are looking for a #SoftwareEngineer at the @ETH_en - @psich_en #Quantum #Computing Hub! emea2.softfactors.com/job-opening/rg…

@Ion_busters We have actually used RAP to measure the Fock state population in this way a couple of years ago when demonstrating EIT cooling with 18 ions. The technique was very well hidden in our paper, however: arxiv.org/abs/1603.05568

Whilst ion traps can operate at high temperature, the ions themselves often need to be cooled to the ground state. Typically people use sideband cooling to do so. But what if you can't? Lee et al demonstrate a novel method using measurement to do so. arxiv.org/abs/2208.05332

The #Quantum Industry Day in Switzerland is back in person this year! Oct, 4th at Technopark, Zurich. Save the date and sign up here qidis22.b2match.io @ETHQuantumCntr @IBMResearch @IDQuantique @CSEMInfo @Zhinst @SwissEuresearch @NCCR_QSIT @nccrSpin

Some very useful tips here:

„How to fool your potential investors“ - #QuantumComputing edition : quantumcomputingreport.com/how-to-pump-up…

Apply for the 2nd Quantum Computing Hard- and Software summer school, 13-17 June @EPFL_en! Deadline April 22. Supported by us and the @ETHQuantumCntr, this program will bring Master's and PhD researchers to study quantum computing technologies. qchs2022.epfl.ethz.ch

@Tonyransford @DavidHa03746758 Again, our focus is on ultimate detection fidelity, if you managed to shelve to the F state. We suggest a few ways to do that as the D state decay you mention is limiting, otherwise.

@DavidHa03746758 .@CHQuant that is an impressive paper but I think you would agree that is not SPAM for the high fidelity (1e-6) result but is instead measuring a mixed state. In fact that technique is not possible to do better than a fewe-4 due to the D5/2 to D3/2 decay which seems to be ignored

Congratulations to IonQ for holding the SPAM record for a couple hours. We have a new a target for you, quantinuum.com/pressrelease/q…

@Tonyransford @DavidHa03746758 Point taken, we did not measure SPAM in the way you did but just how well we could separate the two populations - using the same technique you also pursued, we just did not think that 200 ms of shelving per shot is reasonable for any practical use…

@DavidHa03746758 I think even in the paper there is no claim of "SPAM" just "detect fidelity" you must be able to single shot prepare two pure states and discriminate from them or it is not much different than measuring a classical coin

Still looking for something to do today? Look no further! Come by #SwissScienceCenterTechnorama, and see single atoms ⚛️ Also meet our team and ask all of your burning questions. Thanks to @ETH_physics, @snf_ch Agora, and Technorama for making this possible!

@DavidHa03746758 Erm, about that… arxiv.org/abs/2012.14606

Sorry, I was focused on industry records, the UCLA group actually held the previous record arxiv.org/abs/2108.12052….

We have an open #postdoc position in the ion trap section of the @ETH_en - @psich_en #Quantumcomputing Hub. Come join us to work on ion traps with integrated photonics. Apply here: bit.ly/3KiLBJI to work on devices like this one: ethz.ch/en/news-and-ev…

Come join us as a tenure track scientist in ion trap quantum computing at the @ETH_en - @psich_en #Quantumcomputing Hub. Details can be found here: bit.ly/3HMVNbQ (Image credit: PSI)

Today is #WomenScienceDay. The new @ETH_en Quantum Center supports female Master students through the INSPIRE Potentials Master Award, to attract and empower excellent female students to conduct their Master's thesis research in one of our groups. 1/3 qc.ethz.ch/community-and-…

Here is a link to the paper: eurosurveillance.org/content/10.280…

It’s worth to re-share this link to help judge how much trust one should put into a rapid antigen test: 122 test kits evaluated by @PEI_Germany Take away: if you have low viral load (e.g. thanks to a booster shot) most kits see nothing! pei.de/SharedDocs/Dow…

@TilmanEsslinger @ETH_physics A bit further west at the @ETH_en @psich_en Quantum Computing Hub we saw it, too.

Last Sunday, after the volcano eruption our environmental control system ENVICO recorded a rather sudden increase in pressure in all our quantum gas labs @ETH_physics