Jonathan Pritchard

Hot off the press - our recent work on engineering strong long-range Rb Cs interactions using Rydberg Förster resonances published today in PhysRevResearch @strathEQOP doi.org/10.1103/PhysRe…

New job vacancy to join the SQuAre neutral atom team developing new approaches to digital quantum computing and analogue optimisation using scalable qubit arrays tinyurl.com/29aypx7c

@pushshotjohn Sounds like an expensive stage....

A stage in life. Your son comes home and pours himself an inch and a half of your best sherry-aged Islay.

Interested in joining the neutral atom computing team? We are hiring for a senior PDRA to work on a new cryogenic dual-species array experiment exploring scalable approaches to error correction - see tinyurl.com/9fme8kmj or contact @jdpritchard3 for more information

@mgbason @dstlmod Not fundamentally, size becomes incorporated into the choice of optics used to send and receive the signal photon mode, which combined with the object reflectivity will give an effective attenuation between input and output.

@jdpritchard3 @dstlmod Is there some threshold on object size?

A quantum lidar double bill-in collaboration with @pushshotjohn we present a new analysis framework for quantum lidar with simple detectors arxiv.org/abs/2307.10795 and use this to experimentally demonstrate quantum rangefinding robust to classical jamming arxiv.org/abs/2307.10794

We show NDRO can suppress readout (SPAM) error without impacting single qubit gates performance, highlighting the scalability of the neutral atom platform for developing high fidelity digital quantum processors.

To overcome this limitation we perform non-destructive readout (NDRO), using deep traps to allow state selective scattering from |1> whilst atoms in |0> remain dark, with a second image confirming if an atom was lost. We implement this on up to 49 sites with fidelity of 99%

Hot off the press - our recent results demonstrating high fidelity single qubit gates with an average error as low as 7x10^‐5 across 225 sites is now available in PRL doi.org/10.1103/PhysRe…. This work was supported through the @EPSRC Prosperity Partnership SQuARe with @M2Lasers

To overcome this limitation we perform non-destructive readout (NDRO), using deep traps to allow state selective scattering from |1> whilst atoms in |0> remain dark, with a second image confirming if an atom was lost. We implement this on up to 49 sites with fidelity of 99%

Using conventional destructive readout we demonstrate global microwave operations using random gate strings of up to 1000 gates on 225 sites, with SPAM errors limited by our inability to discriminate between atoms being in state |1> or being lost during the sequence

@dstlmod Finally, we exploit the temporal correlations of our photon pairs to implement quantum rangefinding of a moving target using a CW pump, again robust to jamming. This offers enhanced covertness over classical approaches requiring temporal signal modulation.

@dstlmod By exploiting the correlations intrinsic to the spontaneous parametric down conversion process which generate our photon pairs our quantum lidar is robust against both fast and slow classical jamming (seen through resilience to a background modulation >3000x the signal level)

@CNQO14 @strathEQOP I'm on the next tour...

Quantum lidar on tour had ribs here. Well, 2/3 of it did. The other third looked on slightly enviously. @CNQO14 @strathEQOP

Very pleased to have been awarded an @RAEngNews Senior Research Fellowship and looking forward to continuing our close collaboration with @M2Lasers to develop a route to fault tolerant quantum computing @UniStrathclyde

Ten outstanding researchers have been appointed as new #RAEngResearch Chairs and Senior Research Fellows, working with industry partners on projects ranging from healthcare to national security: raeng.org.uk/news/academic-…