Chris Self

Quantum computing researcher at @QuantinuumQC

[Chris Self @chris_n_self]

Can we use tools from quantum error correction to add some (partially fault-tolerant) protection to quantum circuits on near-term hardware?

In https://t.co/Ja6f5hnjUD we demonstrate progress using the [[k+2, k, 2]] error detection code on Quantinuum’s trapped-ion QC (1/8)

[Machine Learning: Science and Technology @MLSTjournal]

Great new work by @TobiasHaug_Q @chris_n_self and Myungshik Kim @QuantinuumQC @ImperialPhysics - '#Quantum machine learning of large #datasets using randomized measurements' - https://t.co/1OoS0tZMGD #machinelearning #AI #quantumcomputing #algorithms #HPC #qubits #code

[Konstantinos Meichanetzidis @konstantinosmei]

A thread on knots.

Every knot K has a corresponding Jones polynomial V(t), a Laurent polynomial in one complex variable.
Computing the Jones is hard.

The Jones is a knot invariant:
if V neq V', then K and K' are topologically inequivalent.

1/6

[YaleQuantumInstitute @Yale_QI]

Scientists from @Yale managed to improve the lifetime of an actively error-corrected qubit beyond the lifetime of the best passive qubit encoded in the system. 1/7 https://t.co/36bkXyF5kd

[Error correction zoo @theeczoo]

QEC has gone beyond break even! Logical error rate of the encoded information is for the first time higher than a bare reference rate. Paper by @v_sivak and collaborators @Yale_QI: https://t.co/9wzpHwDUbo 1/5

[Chris Self @chris_n_self]

There are many aspects left to explore including compilation strategies, its use in quantum simulations and incorporating other QEC elements

It was fantastic to work on this with Marcello and @davamaro_, as well as all the other great people and technology @QuantinuumQC! (8/8)

[Chris Self @chris_n_self]

Can we use tools from quantum error correction to add some (partially fault-tolerant) protection to quantum circuits on near-term hardware?

In https://t.co/Ja6f5hnjUD we demonstrate progress using the [[k+2, k, 2]] error detection code on Quantinuum’s trapped-ion QC (1/8)

[Chris Self @chris_n_self]

Since this is an error detection code the logical quantum volume of 2^8 comes with the trade-off of needing to discard results. Using 2 rounds of mid-circuit syndrome measurement we see a discard rate of 86.(8)%. For context, our circuits contain up to 379 two-qubit gates (7/8)

[David Hayes @DavidHa03746758]

They're all breakthroughs. Eventually, one last breakthrough will get us to practical quantum advantage and get all the credit. But before that, all the other advancements get us closer to the final push

https://t.co/vW4MRbYaSS

https://t.co/fjfP7W84Q6

[Siddhant Singh @siddhantphy]

#qecarxiv
Protecting Expressive Circuits with a Quantum Error Detection Code
[https://t.co/MUtIyQSI6N]

[Ciarán Ryan-Anderson @quCiaran]

Check out our work on implementing two different logical CNOT gates on two different #QEC codes. In the process, we found a logical CNOT outperforming the physical qubit CNOT! So awesome to work with the great people and technology at @QuantinuumQC! https://t.co/xmOpKrJPWM

[Hsin-Yuan Huang (Robert) @RobertHuangHY]

Are there exponential advantages in using quantum machines to learn about the physical world?🎯

We establish the affirmative through rigorous proofs + physical experiments on the Sycamore quantum processor in https://t.co/TgT4i2llFZ. [📜1/10]

[Imperial College London @imperialcollege]

THREAD: Following our #BlackLivesMatter tweet on Monday, many members of our community have been in touch to ask - rightfully - what we are doing to help fight racism and inequality at Imperial and better-support our Black students and staff

[Dr Claudia Antolini 🌌🚀#BLM she/her 🐯 @CA_AstroComm]

I just met a little girl on the train and we were chit chatting until I said I am a scientist.

Her eyes lit up and she said she wants to be a scientist too when she grows up 🤩

Even though this story sounds too good to be true it did actually happen!!!

1/n

[Chris Self @chris_n_self]

@AlexSBradshaw :((