KemperLab

[KemperLab @KemperLab]

The Kemper group is looking for postdoctoral scholars to join our group!  We work at the intersection of quantum computing and condensed matter physics; you may find some recent publications at our group website.

Interested? Contact us, or apply https://t.co/8YnlsG7YRo

[Physical Review Research @PhysRevResearch]

Mapping the metal-insulator phase diagram by algebraically fast-forwarding dynamics on a cloud quantum computer, Thomas Steckmann et al @thomasSteckmann @kemperlab @ncsusciences #CondensedMatter #Quantum #Materials https://t.co/UL0PXcDdsr

[KemperLab @KemperLab]

6/n Work was done @ncstatephysics!

[KemperLab @KemperLab]

Paper alert! Our Algebraic Compression method has some new some new capabilities: long-range hopping, arbitrary lattices and controlled time evolution for free fermion systems in fixed depth circuits.

With @wa_de_jong, @CampsDaan, @RoelVanBeeumen

https://t.co/2y4WhGF4Oj

1/n

[KemperLab @KemperLab]

What else can we use this for? Stay tuned...

Thanks to Efekan Kökcü E, Daan Camps, Lindsay Bassman Oftelie, Bert de Jong, and Roel Van Beeumen R.

5/n

[KemperLab @KemperLab]

For more details, see our preprint https://t.co/nUNxcF4TL8. Thanks to Efekan Kökcü, Heba Labib @ncstatephysics, and Jim Freericks @Georgetown.

6/6

[KemperLab @KemperLab]

Next up, you can get fermionic as well as bosonic correlation functions *without* additional effort! We have two ways of doing this (post-selection and auxiliary operator), but both work pretty well as seen from data obtained on @IBMResearch ibm_auckland with @qiskit.

5/n

[KemperLab @KemperLab]

What does this let you do aside from non-unitary operators? Frequency and momentum-selectivity! By exciting with a definite momentum and a selective frequency, you can just get a single signal which leads to high signal to noise.

4/n

[KemperLab @KemperLab]

Paper alert! Ever wonder about measuring response properties (light scattering, electron propagation) on quantum computers? Make the experiment part of your quantum simulation. Read on for more...

https://t.co/nUNxcF4TL8

1/n

[KemperLab @KemperLab]

Instead, we propose you make B(t) part of the evolution, and A(t) a measurement -- in essence making the experiment a part of your quantum simulation.

3/n

[KemperLab @KemperLab]

Quantum computers' restrictions present a challenge -- you'd like to evaluate ⟨A(t)B(t′)⟩, but the Hadamard test method requires A and B to be unitary. There are ways around this, but they're inconvenient and can lead to excess noise.

2/n

[KemperLab @KemperLab]

The second of our joint publication with @BerkeleyLab is out! A bit more math, a bit less physics, but all good.

https://t.co/eebqIiBR4u

With @wa_de_jong, @quantumblonde, @RoelVanBeeumen, @doc_lex.

[KemperLab @KemperLab]

Excited to have been a part of this long collaboration.

Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor https://t.co/GTCWV2zThU

[KemperLab @KemperLab]

Efekan fast-forwarded the audience with his talk on fast-forwarding time evolution on quantum computers.

[KemperLab @KemperLab]

Akhil presented his work on identifying quantum phase transitions at #apsmarch. Nice work!

[KemperLab @KemperLab]

Thomas gave an excellent talk at #apsmarch about using DMFT on quantum computers! More to come from our group in the next few days.

[KemperLab @KemperLab]

Super excited this work is out in @ScienceAdvances !

[DOE Office of Science @doescience]

Quantum computers can analyze systems that are too complicated for conventional ones. But even they have their limits. Scientists @NCState figured out how to bypass a certain step, allowing quantum computers to measure thermodynamic properties of systems: https://t.co/5RJ0fRxaKc