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Frédéric Grosshans
@fgrosshans
, 5 tweets, 4 min read Read on Twitter
Now at #IWQNS, Saikat Guha from @UoA on photonic quantum computing with discrete variable cluster states
#LTQI
@uoa Saikat Guha’s approach is on the “where is my photon ?” approach, based on progressive fusion of clusters. But
we do not understand the fundamental limits of corresponding measurement.
#LTQI #IWQNS
@uoa Saikat Guha: these measurement can be used to assemble small cluster states into greater lattices. Then percolation allows to expand this. He then gives several lattices with different thresholds, from .58 to .74 #LTQI #IWQNS
@uoa Sakat Guha starts with GHZ states. Is this possible with 2-photn Bell states ?
#LTQI #IWQI
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More from @fgrosshans see all

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Frédéric Grosshans
@fgrosshans
Now at #IWQNS, Kavan Modi from @MonashUni on Stochastic proceses and application to quantum networks
#LTQI
@MonashUni Kavan Modi: Classical stochastic processes can ofte be modelled by MArkov Chains, ore hidden markov chains, where the last n responses (n:= Markov order) are lumped together. #LTQI #IWQNS
@MonashUni Kavan Modi: What happens on quantum systems ? Like Biomolecule hit by a stream of laser pulses, or qubit modified by gates in presence of correlated environment. #LTQI #IWQNS
Read 7 tweets
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Frédéric Grosshans
@fgrosshans
Now at #IWQNS Zhang Zheshen form @UoA on Entanglement-Assisted Quantum Photonic Sensor Networks
#LTQI
@uoa Zhang Zheshen uses enatgled light to detect targets. His entaglement source, low brightness limit: # photon/mode N_s ≫ 1. Phase correlation |⟨â_s â_I⟩|≈√N_S ≫ N_S. #LTQI #IWQNS
@uoa Zheshen Zhang:
In an experiment with 14 dB loss, 75 dB Nouise background, quantum wins by 1 dB
arxiv:1411.5969 arxiv.org/abs/1411.5969 PRL 114 110506 doi.org/10.1103/PhysRe…
Ideal implementation would be 3 dB
Quantum bound is 6 dB (matched by explicit receiver)
#IWQNS #LTQI
Read 8 tweets
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Frédéric Grosshans
@fgrosshans
Now at #IWQNS, Kanupriya Sinha from @ArmyResearchLab and @JQInews on Tailoring fluctuation phenomena in nanophotonic systems: collective effects in Casimir-Polder forces & non-Markovian dynamics in atomic collective states
#LTQI
@ArmyResearchLab @JQInews Kanupriya Sinha; Casimir–Polder forces are important for integrated atom systems.
The interaction of a dipole at distance z of a mirror is U ∼ – ℏΓ₀/16(k₀z)³ : At z∼10 nm, U∼10 mK.
Where k₀ ← ω₀ (2 level split)
#LTQI #IWQNS
@ArmyResearchLab @JQInews Kanupriya Sinha looks at many ways to drive the interaction. #LTQI #IWQNS
Read 8 tweets

Related threads

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Norman Ornstein
@NormOrnstein
Based on having real electors, people of good character who would weed out a bad apple. Same philosophy that had senators chosen by state legislatures. We no longer have real electors. And the distortions of the electoral college have grown exponentially.
Population ratio between largest and smallest states was 16 to 1, now 70 to 1. By 2040, 50 percent of Americans will libe in just 8 states, 70 percent in 15 states. We will see more instances where winner of popular vote loses presidency, not by 3 million but by 8 or 9.
To believe that this will not lead to a serious crisis of legitimacy is mistaken. And we will have a Senate where 30 percent of Americans choose 70 senators. And will not be representative of the country’s diversity or economy.
Read 5 tweets
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Katia Moskvitch
@SciTech_Cat
So I wrote a story for @WiredUK on #quantum computing. Amount of hype & misconceptions around it is insane!

Here's my piece: wired.co.uk/article/quantu…

(huge thnx 🙌 to all who helped: @tim_weber, @jtemperton, @where_is_chris, @MJBiercuk, @strom_m, @fcacarminati, @preskill &more)
And here is a brief summary - and some myth busting:

1. Achieving quantum supremacy *won't* magically give us super powerful supercomputers that can do everything better than standard computers;
2. Quantum supremacy simply means a quantum computer will perform *one* single task - might not be a useful task even - better than a traditional computer.

And it doesn't mean anything for any other tasks, where standard computers might & likely will be better;
Read 19 tweets
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Katia Moskvitch
@SciTech_Cat
Here is how to programme a game on a QUANTUM computer. Yep, you read that right! That's already happening.

So if you are into video #gaming, or #quantum mechanics, or programming, or just curious how you can use all of this, read on 😀
I spoke to @IBM folks in Zurich who are giving a crowd of game developers & just enthusiasts an opportunity to use IBM's 16-qubit quantum computer to design games.

They'll be doing it next weekend in Helsinki, in a *sauna* & on a Ferris wheel in sub-zero temp (don't ask me why)
So how do you design, say, Battleship on a quantum computer? Here goes:

You have to use Qiskit – short for Quantum Information Science Kit – the open source framework launched in 2017 and based on IBM's quantum computing programme, Q Experience
Read 12 tweets
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Domani Capital
@AdaptToReality
#SethLloyd

#Quantum Generative Adversarial Networks

Q-GANs

#GenerativeAdversarialNetworks

Discriminator DLNN
vs
Generator DLNN
Jenson-Shannon Divergence
Convex Optimization ?

Real-Data
vs
Pseudo-Data

min-max

Quantum generative adversarial learning

#SethLloyd & #ChristianWeedbrook

QuGANs

arxiv.org/pdf/1804.09139…
when the data consists of samples of measurements made on high-dimensional spaces, quantum adversarial networks may exhibit an exponential advantage over classical adversarial networks
Read 6 tweets
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Cyrus Toulabi
@CyrusToulabi
I can't with this guy...but interestingly, he's also revealing a lot with each one of these interviews.

Why not just go speak to the Grand Jury? Clearly, it's not about avoiding spending more time talking about the investigation and your experience...

He can't help himself..
#NOW: SAM NUNBERG says he was told he wasn't a target or a subject of the investigation and he was OFFERED IMMUNITY by the Special Counsel's team.

He also said THEY WANT HIM TO TESTIFY...TO CATCH ROGER STONE ON PERJURY...

ADMITTING THAT ROGER MAY HAVE LIED TO PROSECUTORS.
#LOL: Save this one...

SAM NUNBERG: "I'M NOT GOING TO JAIL, COME ON."
Read 5 tweets
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Dr Vega
@queenofquanta
Day 2 of quantum advantage workshop at @InHenriPoincare, featuring Ashley Montanaro (@quantumashley), Juan Bermejo-Vega (myself) and Dominik Hangleiter. #LTQI
We kick off with Ashley Montanaro @quantumashley, giving a tutorial about IQP circuits (IQP = Instantaneous Quantum Polynomial time) and potential for demonstrating superior quantum computational performance. #LQTI
Refs:
- Shepherd, Bremner 0809.0847;
- Bremner, Jozsa, Shepherd 1005.1407;
- Bremner, Montanaro, Shepherd 1504:0799;
- Bremner, Montanaro, Shepherd 1610:01808;
Read 24 tweets

Trending hashtags

#ArtificialIntelligence #Deuterium #testing #FollowTheWhiteRabbit #Drugs #QuantumDilemma #botnets #origami #RICO #cooling #gaming #EBS #memristive #neurons #imaging #Feedback #autoimmune #S3 #SES #VXL100 #invitro #RoyalWedding2018 #ZTE #cyberwarcon #WorldWarQ
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