Now at #IWQNS, Kavan Modi from @MonashUni on Stochastic proceses and application to quantum networks

#LTQI

#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

Now at #IWQNS Zhang Zheshen form @UoA on Entanglement-Assisted Quantum Photonic Sensor Networks

#LTQI

#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

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

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

#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

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

@Berkeley_ions Sara Mouradian did her PhD on NV centers, and now works on ion traps.

A single photon detected from two NV⁻ centers allows to prepare them in entangled state. Her NV's are at 10K. Current rate of entanglement is limite to much less than spin coherence time

#LTQI #IWQNS

A single photon detected from two NV⁻ centers allows to prepare them in entangled state. Her NV's are at 10K. Current rate of entanglement is limite to much less than spin coherence time

#LTQI #IWQNS

@Berkeley_ions Sara Mouradian put her NVs in photonic crystal (diamond) cavities to improve entanglement rate. Her cavity has Q>14,000, but NVs are then close to surfaces, which broadens noise.

#LTQI #IWQNS

#LTQI #IWQNS

Now at #IWQNS, Ashlesha Patil, Saikat’s student at @UoA speaks on Classical Simulation of Stabilizer Circuits

#LTQI #IWQNS

#LTQI #IWQNS

Now at #IWQNS, Saikat Guha from @UoA on photonic quantum computing with discrete variable cluster states

#LTQI

#LTQI

Now at #IWQNS, Rafael N. Alexander from @UNM on quantum computing with continuous variable clusters

#LTQI

#LTQI

Now ar #IWQNS Lincoln D. Carr @coschoolofmines on quantifying complexity in quantum phase transitions via mutual information complex networks

#LTQI

#LTQI

@coschoolofmines Lincoln D. Carr: In present quantum device (@dwavesys and analog devices) can already be described by networks difficult to simulate. Networks can be in the Hamiltonian, or arise spontaneously in the state. Here is about these spontaneous networks

#LTQI #IWQNS

#LTQI #IWQNS

Now at #IWQNS, @vparigi81 from @lkb_lab on Engineering non-Gaussian entangled complex photonic graph states .

#LTQI

#LTQI

@vparigi81 @lkb_lab Recent #LTQI threads from me on simlar talks by @vparigi81 : ,and (includes link to a video)

@vparigi81 @lkb_lab .@vparigi81’s networks’ nodes are frequency/temporal modes of e.m. fields, made thorugh quantum frequency combs. That is merging optical frequency combs (OFC), with 10⁶ modes with quantum optics by pumping a parametric oscilaltorwith an OFC #LTQI #IWQNS

Now at #IWQNS @SumeetKatri6

from @LSU on Robust NEtwork Architectures and topologies for entanglement distibution #LTQI #IWQNS

from @LSU on Robust NEtwork Architectures and topologies for entanglement distibution #LTQI #IWQNS

@LSU @SumeetKhatri6 .@SumeetKhatri6 : looks at 2D networks without quantum repeaters, using the multiplicity of paths to add robustness to losses and node failure.

#IWQNS #LTQI

#IWQNS #LTQI

Now at #IWQNS, Don Towsley from @UMassAmherst on Entanglement routing and switching in quantum networks #LTQI

@UMassAmherst Don Towsley looks at repeaters/routers/switchs

With m links/link

Phase 1: link entanglement succeeds with p=1 – (1 — p₀)^m

Phase 2: splicing the links succeeds with probability q

#LTQI #IWQNS

With m links/link

Phase 1: link entanglement succeeds with p=1 – (1 — p₀)^m

Phase 2: splicing the links succeeds with probability q

#LTQI #IWQNS

@UMassAmherst Don Towsley study this in a grid network, with a single mode per link, one memory/mode, and a probability p to generate entanglement. #LTQI #IWQNS

Now at #IWQNS, Prithwish Basu from U. Massachusetts on Routing and Scheduling in cClassiacal Networks #LTQI

Now at #IWQNS, Roberta Zambrini, from @IFISC_mallorca on Quantum complex networks: introduction, Synchronization ans Noiseless subspaces #LTQI

@IFISC_mallorca Roberta Zambrini: classical complex networks are used to study the phenomenon of spontaneous synchronization. It has been recently generalized into the quantum regime

#LTQI #IWQNS

#LTQI #IWQNS

@IFISC_mallorca Roberta Zambini: The synchronization is induced by a dissipation. Two coupled squeezed harmonic oscillators need collective dissipation to become synchronized. (independent dissipation doesn’t lead to sync)

#IWQNS #LTQI

#IWQNS #LTQI

Now at #IWQNS, Patrick Thiran from @EPFL presents an overview of classical an and complex networks. Mainly on classical networks, and on tools who might be applied to quantum networks.

#LTQI

#LTQI