Christophe Valahu

Postdoctoral research associate with QCL group in Sydney

[Dr Zixin Huang @Ithilia_V]

New paper out! For the first time, we demonstrated sensing with GKP states. We measured position and momentum simultaneously, with precision above the standard quantum limit! Read it here: https://t.co/myRGJW3lYq
@CValahu @tingreitan @JoshKoomz @BBaragiola

[PRX Quantum @PRX_Quantum]

An efficient, cross-platform method for benchmarking bosonic modes by applying randomized displacements can identify underlying noise using few measurements. @CValahu @MJBiercuk @tomas_navickas @Sydney_Uni @SydneyNano

🔗 https://t.co/R1DF4RkhLR

[Michael J. Biercuk @MJBiercuk]

The hits don't stop! Another massive #quantumcomputing outcome, this time combining leadership @Sydney_Science with tech from @qctrlHQ !

Universal gate set for #GKP encoded #qubits enabled by optimized control waveforms!

https://t.co/K6tKrUucVh

[Christophe Valahu @CValahu]

ping @SydneyNano , @SydneyQuantum , @MJBiercuk

[Christophe Valahu @CValahu]

New arXiv drop: "Universal Quantum Gate Set for Gottesman-Kitaev-Preskill Logical Qubits" (https://t.co/GpJ0TqwBoi)
We demonstrate a universal gate set for GKP qubits, and, for the first time, 2-qubit entanglement with 2 logical GKP codewords encoded in a single trapped ion 1/N

[Christophe Valahu @CValahu]

It's been really fun to work on! Huge props to Vassili Matsos for driving this, and to @MJBiercuk, @tingreitan, M. Millican, T. Navickas, X. Kolesnikow

[Christophe Valahu @CValahu]

As a bonus, we prepare a maximally entangled logical Bell state in a single step from vacuum using a similar sequence of optimised pulses. Through state tomography, we measure a logical state fidelity of 84.2%. 4/N

[Christophe Valahu @CValahu]

Very exciting to have this work out! Checkout @IvanKassal's thread on how we used an ion trap to simulate chemical dynamics

[Ivan Kassal @IvanKassal]

About 5 years in the making, here it is: The first simulation of chemical dynamics on a quantum computer!
"Experimental Quantum Simulation of Chemical Dynamics"
https://t.co/9VoylP5Z1B

[Ivan Kassal @IvanKassal]

About 5 years in the making, here it is: The first simulation of chemical dynamics on a quantum computer!
"Experimental Quantum Simulation of Chemical Dynamics"
https://t.co/9VoylP5Z1B

[Christophe Valahu @CValahu]

@aj_rasmus @NSF @arxiv Checkout this great effort by Waterloo, https://t.co/PjUXRky8Y7

[Christophe Valahu @CValahu]

@aj_rasmus That's a great question! I'm not sure what the consequence is in this case of doing mirror symmetry. Will verify this in simulations.

[Christophe Valahu @CValahu]

Excited to share our new preprint: https://t.co/CUZQpVhAuB

We adapt a randomized benchmarking-like protocol to bosonic modes to efficiently characterize a noise source, its strength and its correlation.

[Christophe Valahu @CValahu]

With our protocol, we can also determine the noise source (heating vs dephasing) and the correlation of the noise. We built analytical error models to describe these and validated everything on our trapped ion experiment.

[Christophe Valahu @CValahu]

Our goal is to characterize bosonic modes in a driven setting. To do this, we apply randomized displacements in phase space, followed by an inversion step and measure a fidelity.
Similar to traditional RB, the decay of mean fidelity gives us the error rate.

[Christophe Valahu @CValahu]

Ping @SydneyNano, @MJBiercuk

[Christophe Valahu @CValahu]

@aj_rasmus This is great! I've been hoping a rigorous study of measurement induced heating would come out, love what you did! :)

[Christophe Valahu @CValahu]

PhD scholarships available in Sydney, great opportunity!

[Sydney Quantum Academy @SydneyQuantum]

📢Apply now for #Quantum #PhD Scholarships.
Gain industry-ready skills, conduct groundbreaking research under world-leading experts at Sydney 's top universities and benefit from competitive stipends, networking, and exclusive events.
Apply by 15 May.
➡️https://t.co/Opu5GAt3iB

[Ivan Kassal @IvanKassal]

🚨 Job alert! 🚨
Three (!) postdoctoral positions in quantum computing for chemistry
Total package: $119k – $148k p.a. for up to 4 years
Some details below; apply by 11 March here: https://t.co/YZodbcsdFy