Chris Long

Presidential Postdoctoral Fellow at Virginia Tech, focusing on Quantum Computing.

(he/him)

[Chris Long @Chris_K_Long45]

@swebsyhq Yes, it comes with Quatz (https://t.co/l7YIew1GTP) by default, but I had fun adding clustering on top.

[Chris Long @Chris_K_Long45]

New personal website: https://t.co/G5HXpVzLFf

[Chris Long @Chris_K_Long45]

You can now download the published article without the paywall here: https://t.co/47y0ji82mn

[Chris Long @Chris_K_Long45]

For many quasiprobability distributions, the set of positive (“classical”) states is difficult to characterize. However, for a random Kirkwood–Dirac distribution, we completely characterized not only the positive states, but also the positive measurements and unitaries.

[Chris Long @Chris_K_Long45]

We have just updated the arXiv with the accepted Physical Review A version so there is an open access peer-reviewed version: https://t.co/fTScSTMM8b

[Chris Long @Chris_K_Long45]

Here is a practice version of my talk from last weeks Foundations of Quantum Technologies Conference at Girton College Cambridge. It is a brief overview of my PhD thesis.

https://t.co/L0Ce1OZb5Q

[Chris Long @Chris_K_Long45]

@starXsally Thank you, I wish I could be there to see all the other talks and posters. Yes it looks like it might be November before I can walk again.

[Chris Long @Chris_K_Long45]

Since finishing my PhD viva on the 6th, with minor corrections, life has been busy. The viva discussion with Alex Thom and Simon Benjamin was insightful, and I'll have a better thesis as a result—thank you! Corrections are now done, but were slowed by an accident on the 17th.

[Chris Long @Chris_K_Long45]

This technique is the same as we used in our recent work on magic state distillation to achieve a 42% improvement in overheads:
https://t.co/PKpdBj6VZR

[Chris Long @Chris_K_Long45]

In our recent arXiv (https://t.co/TACezZ3dDs) we benchmarked QEC and magic state factories for spin qubits. By computing magic state production overheads as a function of initialization, gate, measurement, and decoherence times we estimated the runtimes for typical algorithms.

[Chris Long @Chris_K_Long45]

VQEs have 3 main problems: (i) excessive runtimes, (ii) susceptibility to noise, and (iii) optimizability. In our recent preprint (https://t.co/OnDXWZfUQV), we address the first 2 without losing optimizability. We achieve this by designing 15x faster pulses for 4-qubit gates.

[Sophia Economou @see_quantum]

We're excited to welcome you to VT & VTQ very soon, Chris!

[Chris Long @Chris_K_Long45]

My favourite result was showing pulse optimization can cut magic state production overheads by 42%.

[Chris Long @Chris_K_Long45]

In our recent arXiv (https://t.co/TACezZ3dDs) we benchmarked QEC and magic state factories for spin qubits. By computing magic state production overheads as a function of initialization, gate, measurement, and decoherence times we estimated the runtimes for typical algorithms.

[Chris Long @Chris_K_Long45]

I have had an amazing time at @Cambridge_Uni @DeptofPhysics for the last 8 years! I am excited to be starting as a Presidential Postdoctoral Fellow at @virginia_tech with Ed Barnes and @see_quantum in late August!

[Chris Long @Chris_K_Long45]

On Friday, I submitted my PhD thesis! I'm looking forward to defending in August and sharing the thesis with the rest of you.

[Chris Long @Chris_K_Long45]

The University of Cambridge is hosting a Foundations of Quantum Technologies conference on September 15–18th to mark the 100-year anniversary of the discovery of modern quantum mechanics.

Abstract submissions for talks and posters close May 4th.

Details:
https://t.co/pUsCqC1pOt

[Chris Long @Chris_K_Long45]

I guess it's time I release a 3.14 pre-built version of PySTE:
https://t.co/yKwQD39b1L

[Chris Long @Chris_K_Long45]

In case anyone else missed it: Python 3.14 released on the 7th of October:
https://t.co/hFoEgBQUmV