Anton Potočnik

                            at ETH Zürich

Transmon Qubit Calculator

With this calculator you can convert between charging energy (Ec) and total capacitance (CΣ), between Josephson energy (EJ), Josephson inductance (LJ), junction critical current (Ic) or room temperature junction resistance (R), and from charging and Josephson energies calculate relevant qubit transition frequencies. Capacitance Al Josephson Junction/SQUID Ec/2π = GHz CΣ = fF EJ/2π = GHz…

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  • FPGA

Red Pitaya FPGA Project 4 – Frequency Counter

Introduction On the way to a powerful acquisition systems let us make a quick detour and create a useful and simple project – the Frequency Counter. Yes, to measure frequencies one can use Red Pitaya’s native apps such as Oscilloscope or Spectrum Analyzer, however, our program will be able to determine frequencies with much higher…

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  • FPGA

Red Pitaya FPGA Project 3 – Stopwatch

In this Red Pitaya FPGA project we will learn about communication between the Linux processing system and the programmable logic. We will demonstrate the basic functionality with a simple FPGA project – Stopwatch. The FPGA algorithm will be based on a 32-bit binary counter with Clock Enable (CE) and Synchronous Clear (SCLR) inputs which we…

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  • FPGA

Red Pitaya FPGA Project 2 – Knight Rider Lights

Introduction A blinking LED is one thing, but a true light show is something one can actually be proud of. In the previous post we built a very simple FPGA program that made one LED on Red Pitaya blink. For such a simple project we constructed the necessary logic by graphically connecting different blocks in Vivado’s…

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  • FPGA

Red Pitaya FPGA Project 1 – LED Blinker

Introduction Red Pitaya is a Zynq7 FPGA-based low cost electronic board with many components such as two core ARM processor, fast ADCs, fast DACs, USB, LAN, etc. In many aspects Red Pitaya is similar to the Arduino or Rasbery Pi with a large community of enthusiasts and increasing collection of open-source material. What makes Red…

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SICRIS bibliography converter

Do you want to list all your publications on your or your department’s web page? Or maybe you want to collect all your scientific publications for project proposal, job application, and so on? Well, in Slovenia we have a nice national web portal called SICRIS where all your published work is stored and maintained. It…

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Size and Symmetry of Superconducting gap in the fcc Cs3C60

We recently published our first high-pressure NMR results on f.c.c. Cs3C60 polymorph. We found some new exciting superconducting properties close to the metal-to-insulator boundary – the superconducting gap increases close to the boundary! Found out more in A. Potočnik, et al. Sci. Rep. 4, 4265, 2014.

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Qballs

During my ski trip I got an interesting idea about a simple arcade game with a completely different approach. In this game the player has to find entangled balls.

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Anvil-type NMR cell

We just started testing our new anvil-type high-pressure cell for the NMR experiment. With the tungsten-carbide anvils we expect to reach pressures up to 4 GPa.

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Bending mercury stream with electrostatic force

One of our recent projects involved a detailed understanding of the mechanism behind bending of liquid streams in electrostatic potential. To test our understanding we performed two experiments, one with tap water, where conductivity is low, and the other with strongly conducting liquid – the mercury. Unfortunately, the explanation why the stream of water is…

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