Josef Hloušek

MSc Thesis Opportunity! More info: uibk.ac.at/en/exphys/rese… #MScThesis #QuantumOptics #UniversitaetInnsbruck #uibk pic.twitter.com/g3F0LVgSua

Excited to announce my project UNAGI has been selected by the Austrian Cluster of Excellence - Quantum Science Austria under the quantA Fellowship program! Huge thanks to Prof. @GregorWeihs and the Photonics Group for support! #QuantumScience #QuantumOptics

Top-notch coincidence counting! Our ultra-fast multi-channel unit offers full channel-number resolution and direct control of quantum systems through feedforward protocols, crucial for cutting-edge photonic experiments @OpticsOlomouc. See: doi.org/10.1103/PhysRe… @QuantumHedgehog

Know your detector? Take measurement sensitivity to the next level @OpticsOlomouc. Paper: doi.org/10.1063/5.0106… #POM23 #POM23_HOTTOPICS @PhotonicsMeetup @IvoStraka @QuantumHedgehog

Quantum physics meets AI: Neural networks decode quantum entanglement quantum.opticsolomouc.org/archives/2887

Exploring new frontiers in single-photon detectors: Unveiling surprising supralinear effects quantum.opticsolomouc.org/archives/2873

Martin Bielak @TweetMartas on optimum quantum state tomography at Bristol Quantum Information Technologies Workshop #BQIT:23 @QETLabsBristol @OpticsOlomouc @prfupol @UPOlomouc

New nonlinearities discovered in single-photon detectors beyond current theoretical models by researchers of @prfupol. doi.org/10.1063/5.0106… @OpticsOlomouc @UPOlomouc

#MachineLearning #quantum entanglement from incomplete measurements & ultraprecise polarization prediction in liquid crystals. @KoutnyDominik & @DVasinka from @OpticsOlomouc at #mlq2021 quantum.opticsolomouc.org/archives/2545

Department of Optics, Faculty of Science, Palacky University youtu.be/AypO_zzwxw0 via @YouTube

Nonclassicality characterization of photonic quantum detectors @OpticsOlomouc. @QuantumHedgehog HYPER-U-P-S project @QuantERA_EU @PhotonicsMeetup #POM21ja #POM21other

@CarlosSMW @OpticsOlomouc @QuantumHedgehog @IvoStraka @PhysRevLett @PhotonicsMeetup This issue is discussed in doi.org/gd55qp @stenssok. Instead, we evaluate g2(0) and other quantum state parameters from retrieved photon statistics. The accuracy of the statistics retrieval affects the accuracy of the parameters being assessed. (3/3)

@PepaHlousek @OpticsOlomouc @QuantumHedgehog @IvoStraka @PhysRevLett @PhotonicsMeetup Very interesting. But I wonder, how would the HBT measurement fail to provide a faithful value of g2?

Faithful photon statistics and autocorrelation measurement without detector tomography. Entropy regularized MaxLik @OpticsOlomouc. Paper: doi.org/dzq8 @QuantumHedgehog @IvoStraka @PhysRevLett @PhotonicsMeetup #POM20ju #POM20other

@CarlosSMW @OpticsOlomouc @QuantumHedgehog @IvoStraka @PhysRevLett @PhotonicsMeetup For single-photon emitters with a low detection rate, everything is nice, and the value of the HBT measurement agrees well with g2(0) parameter. Unfortunately, for states with negligible multiphoton content, the HBT fails to produce the correct value of g2(0). (2/3)

@CarlosSMW @OpticsOlomouc @QuantumHedgehog @IvoStraka @PhysRevLett @PhotonicsMeetup g2(0) is defined using the first and second moments of photon statistics - strictly speaking, it cannot be directly measured. HBT actually gives the anticorrelation parameter, not the g2. (1/3)

Nonlinearity of single-photon detectors - test your SPADs and SNSPDs @OpticsOlomouc. @QuantumHedgehog @IvoStraka @PhotonicsMeetup #POM20ju #POM20other