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Frédéric Grosshans @fgrosshans@mathstodon.xyz Profile picture
@fgrosshans
May 15, 2018 • 3 tweets • 3 min read • Read on X
Now at #MCQS, Cristina Butucea from @ENSAEParisTech on Local Asymptotc Equivalence of Quantum Gaussian Model
#LTQI
@ENSAEParisTech Cristina Butucea defines an experiment (Ω, A, P) : a measurable space together with a family of probability distributions. Together with Markov Kernels, it allows to define Le Cam‘s distance
#LTQI #MCQS
@ENSAEParisTech Cristinea Butucea: Two sequences P₁,n , P₂,n are asymptotically equivalent if their distance →0, which implies thatn many asymptotic risk bound for tests, estimators etc. carry over from a model to the other
#LTQI #MCQS

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More from @fgrosshans

Frédéric Grosshans @fgrosshans@mathstodon.xyz Profile picture
Sep 4, 2018
Now at #JapanEUWorkshop, Shuntaro Takeda on A strategy for large-scale optical quantum computing #LTQI
Shuntaro Takeda: use a deterministic approach, a loop to increase scalability. Determinism is brought by continuous variable (CV) system, which need 5 gates to be universal: 3 linear, squeezing and cubic gate (the hard one) #LTQI #JapanEUWorkshop
Shuntaro Takeda: both discrete CNOT and CV cubit gates need χ⁽³⁾ and are therefore difficult, but the latter is at least deterministic.
#LTQI #JapanEUWorkshop
Read 7 tweets
Frédéric Grosshans @fgrosshans@mathstodon.xyz Profile picture
Sep 4, 2018
Now at #JapanEUWorkshop , Anthony Laing on Photonic simulations of molecular quantum dynamics #LTQI
Anthony Laing essentially looks a photnic simulation of vibrational modes of molecules
Anthony Lang looks at selective dissociation with a single quantum of vibration NH₃→NH₂+H. These molecular transition can be manipulated through control of the wavepacket. #LTQI
Read 6 tweets
Frédéric Grosshans @fgrosshans@mathstodon.xyz Profile picture
Sep 4, 2018
Now Erika Kawakami on Capacitive read-out of the Rydberg states towards the realization of a quantum computer
using electrons on helium
#LTQI #JapanEUWorkshop
Erika Kawakami: Why use electrons on helium? The system is clean: electrons float in vacuum, far prom nuclear spin and other charges. Electron qubits are 1µm away, which will be useful for surface codes #LTQI #JapanEUWorkshop
Erika Kawakami: The spin-state is used a qubit state, the rydberg states are auxiliary states. T₂=100 s for spin states. 1 qubit gates through ESR; 2-qubit gate using Coulomb interacton #LTQI #JapanEUWorkshop
Read 4 tweets
Frédéric Grosshans @fgrosshans@mathstodon.xyz Profile picture
Sep 4, 2018
Now, Eleni Diamanti on Practical Secure Quantum Communications #JapanEUWorkshop #LTQI
Eleni Diamanti: The current solution to secure network links: Symmetric + Asymmetric cryptography. Recent development to fight the threat of quantum computers: postquantum cryptography. Quantum cryptography offers the advantage to be future proof #LTQI
Eleni Diamanti: REal security will have to combine the the use of classical and quantum cryptography. nature.com/articles/nphys…
#LTQI #JapanEUWorkshop
Read 12 tweets
Frédéric Grosshans @fgrosshans@mathstodon.xyz Profile picture
Sep 4, 2018
Now, Yoshiro Takahashi from @KyotoU_News on Advanced quantum simulator with novel
spin and orbital degrees of freedom #LTQI
@KyotoU_News Yoshihiro Takahashi: With ¹⁷³Yb nuclear spins, we have a SU(6) Fermi-Hubbard model. They observe formation of SU(6) Mott insulator.
#LTQI #JapanEUWorkshop
@KyotoU_News Yoshihiro Takahashi ’s next traget: SU(6) quantum magnetism. A difficulty is measuring spin correlation, which is achieved through singlet-triplet oscillation compined with photo association #LTQI #JapanEUWorkshop
Read 7 tweets
Frédéric Grosshans @fgrosshans@mathstodon.xyz Profile picture
Sep 4, 2018
Now, Christian Groß, on quantum simulation of the Hubbard model, from hidden correlations to magnetic polarons. #LTQI
Christian Groß simulates Hubbard model with cold atoms in optical lattices. Li atoms hop with amplitude t. Currently, they only have global control, no local control. #LTQI
Christian Groß observes the atoms with quantum gas microscopy. He observes a single plane desctructively through a high NA objective every 30s. #LTQI
Read 8 tweets

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