Dulwich Quantum Computing

@dulwichquantum

Parody quantum computing startup from South London

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Dulwich Quantum Computing@dulwichquantum· Jul 5

Me controlling a qubit with EM pulses in real time. www.youtube.com/watch?v=dWr_...

Dulwich Quantum Computing@dulwichquantum· Jun 26

Henry Legg @henrylegg.bsky.social compares Microsoft's Majorana 2 result to "Finding an image of Jesus in toast by looking through an entire bakery's ⁠worth of loaves. If you're looking into something which is essentially just random physics, eventually you will find the Jesus in your toast."

"Daily Bread" toaster with a stack of toasted bread slices with Jesus on them.

Dulwich Quantum Computing@dulwichquantum· Jun 26

Me suffering from a heat wave while quantum computing offers a potential solution.

Vice-admiral Sir Tony Johnstone-Burt, master of the household to the sovereign, holds a battery-powered fan for King Charles as he attends a London Climate Action Week reception at St James’s Palace

Dulwich Quantum Computing@dulwichquantum· Jun 10

many-body physics

Dulwich Quantum Computing@dulwichquantum· Jun 8

Wait a second, Michio Kaku claims his publisher runs his books by a fact checker! Who was it?? Give me their name!!! I want to talk to that person!!!! www.youtube.com/watch?v=JU1f... p.s. It would be so great if this claim itself did not fact check...

Dulwich Quantum Computing@dulwichquantum· May 13

When your AI pitch fails so miserably the right response should have been to immediately pivot to quantum AI! www.theguardian.com/technology/2...

Dulwich Quantum Computing@dulwichquantum· May 5

Having a hard time deciding which of these two looks to wear for #QIP2027.

Singer Sam Smith looks like a deco-era Georges Lepape fashion illustration come to life in a double feathered headdress and glittering black opera cloak, designed by their partner, Christian Cowan.

Luke Evans, who is starring as Frank-N-Furter in a Broadway restaging of Rocky Horror, has gone full Tom of Finland in a studded leather cop costume designed by Alejandro Gómez Palomo.

Dulwich Quantum Computing@dulwichquantum· May 2

Apparently there's a quasi-polynomial time classical algorithm for the unknot problem which was announced in a talk in 2021 and is summarized in this slide, but there's not actual writeup of it anywhere. www.maths.ox.ac.uk/node/38304

Dulwich Quantum Computing@dulwichquantum· May 1

"See Figure 10 for details on the computation"

Dulwich Quantum Computing@dulwichquantum· Apr 26

This is how most classical-quantum solutions work these days.

Clinton Folger was the mail carrier for Nantucket. Because cars were forbidden by the town, he towed his car to the state highway for driving to Siasconset.

Dulwich Quantum Computing@dulwichquantum· Apr 21

If you're tired of the AI assistent in Excel, you can now connect it to a quantum computer instead! multiversecomputing.com/singularity

Dulwich Quantum Computing@dulwichquantum· Apr 17

Why bother with recommendation letters when you get a like from Peter Shor?

peter-shor.bsky.social‬ and 7 others liked your post · 37m
It would be hugely disappointing if the device that was officially announced as "lending credence to the notion that quantum computation occurs in many parallel universes" and whose predecessor was used to "create a wormhole" would now be used by mere mortals to simulate some boring Hamiltonian.

Dulwich Quantum Computing@dulwichquantum· Apr 13

Are you telling me there is a “No-Pancake Theorem” in quantum information folklore and I have never heard about it? arxiv.org/pdf/1006.135...

The fact that no CPTP map can annihilate σz while
preserving σx and σy is known, in quantum information
folklore, as the “No-Pancake Theorem”.

Our central result might be thought of as a fully general
No-Pancake Theorem, since it rules out the dynamical
superselection of all such non-algebraic IPS

Dulwich Quantum Computing@dulwichquantum· Apr 7

"We [...] introduce a new measure, felinity." arxiv.org/abs/2604.02793

Definition 2.1 (Felinity of a quantum state). For a n-qubit state ρ, the felinity of ρ, F n(ρ) ∈ [0, 1] is defined as...

Dulwich Quantum Computing@dulwichquantum· Apr 1

Also, check out this comment on SciRate! scirate.com/arxiv/2603.2...

$This is indeed a surprising result, provided that every piece can be confidently verified by a third party and that all assumptions can be further justified. Since this work appears to make more assumptions than prior work, that somewhat weakens the baseline. Below, I list all 11 places in the paper that contain “assume” or related forms: Assumes non-local connectivity. Here, we assume a 1 ms stabilizer measurement cycle. We assume that each surgery gadget is implemented in (\tau_s \approx 2d/3) code cycles, where (d) denotes the distance of the processor code. We assume that each layer of surgery takes (\tau_{\mathrm{cult.s}} = 2d_s/3) code cycles, which often minimizes the total logical error rate. In the above, we assumed that for each (C_i), the involved (m_i) qubits are read from memory at the beginning and written back to memory at the end. For the balanced architecture, we assume that (2q_a < k_p), so that the processor can store the (2q_a) qubits needed for unary iteration while still leaving enough space to apply the word operators. For the ECC-256 algorithm, based on compilations in [116--120], we assume the following split in the Toffoli count among controlled adders, adders, and lookups: 40% for 256-bit adders, 50% for 256-bit controlled adders, 10% for lookups with 16 address bits and word size 256. In addition, we assume the existence of logical gadgets capable of measuring many logically disjoint PPMs on high-rate codes in parallel. For (P < 600) ((P \geq 600)), we assume processor encoding rates of (r = 20\%) ((r = 30\%)), based on upcoming work [125]. We assume that these codes have the same rate as the processor, except when (P < 100), where we assume a lower encoding rate of 4% to allow transversal coupling of smaller block sizes (e.g., the bb18 code). To account for larger codes and more complex PPMs, we consider (\gamma = 1\text{--}3) and plot results for (\gamma = 2…$

Dulwich Quantum Computing@dulwichquantum· Mar 24

Google going both for superconducting qubits as well as neutral atoms

Dulwich Quantum Computing@dulwichquantum· Mar 18

Gilles Brassard explains how he met Charlie Bennet on a beach in 1979. The lesson here is that next time you see somebody on a beach who looks like a cult leader, do not hesitate to approach them to explain how quantum money works. You might both get a million dollars one day!

Dulwich Quantum Computing@dulwichquantum· Mar 16

"From a chemical and biochemical perspective, computing the ground-state energy of a model to some specified accuracy – even chemical accuracy – is a highly artificial target."

Dulwich Quantum Computing@dulwichquantum· Mar 16

"The second proposition, that elucidating the reaction mechanism of nitrogenase will lead to a transformative societal impact, is similarly nuanced." "While it is true that the nitrogenase enzyme functions at ambient temperature and pressure, it is simply false that it consumes much less energy."

While it is true that the nitrogenase enzyme functions at ambient temperature and pressure, it is simply false that it consumes much less energy. This is because the large amount of energy required for nitrogen fixation mainly originates from thermodynamics, i.e. one needs energy to break the strong nitrogen triple bond. In fact, taking into account the physiological conditions and the ATP cost, bacteria arguably expend more energy to reduce ammonia (Chan 2024) than a modern efficient industrial implementation of the Haber-Bosch process. Thus the real hope behind trying to understand the nitrogenase mechanism in the context of societal impact is that we may one day engineer a variant of it with more desirable properties, e.g. with higher turnover, or with a lower carbon footprint, or which is more selective for nitrogen reduction. Whether this is actually possible remains to be seen, and certainly requires much more than knowing the ground-state of FeMo-co, or even the full reaction mechanism.

Dulwich Quantum Computing@dulwichquantum· Mar 16

When you forget to apply Pauli Z before attending Oscars.

Dulwich Quantum Computing@dulwichquantum· Mar 2

Never heard of "Oratomic" before, but it is now officially the hottest quantum startup out there! hsinyuan-huang.github.io

Dulwich Quantum Computing@dulwichquantum· Feb 26

Can anyone make a carpet with this pattern? arxiv.org/pdf/2602.222...

Dulwich Quantum Computing@dulwichquantum· Feb 23

When will we get "Tensors for babies", @csferrie.com? arxiv.org/pdf/2602.158...

Figure 1: The tensor spider T with 6 legs

Dulwich Quantum Computing@dulwichquantum· Feb 22

When you want to observe qubits without disturbing them.

Dulwich Quantum Computing@dulwichquantum· Feb 21

Love this Better Offline episode where Ed Zitron @edzitron.com and Cal Newport @author-calnewport.bsky.social discuss issues in current AI reporting. "Vibe reporting" and "hype laundering" are common also in quantum computing. www.youtube.com/watch?v=85uX...

Dulwich Quantum Computing@dulwichquantum· Feb 18

What are you doing? Me: "Generating quantum entanglement from sunlight" arxiv.org/abs/2602.15655

Dulwich Quantum Computing@dulwichquantum· Feb 13

Me including \usepackage{microtype} in the LaTeX document preamble. ctan.org/pkg/microtype

Dulwich Quantum Computing@dulwichquantum· Feb 10

Me: Immediately buying a train ticket to Germany.

Ordering
An ordering of volumes is no longer possible, but all volumes of this series are available in almost all university libraries in Germany.

Dulwich Quantum Computing@dulwichquantum· Feb 6

When your butt slides into DMs with Dulwich without you being aware of it.

Dulwich Quantum Computing@dulwichquantum· Feb 6

For those who want to read the [mtl] paper...