70 citations · 533 across the 27 of their papers we have counts for
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Quantum non-Gaussian high Fock states of light pulses and their superpositions
G. P. Teja, Chandan Kumar, Lukáš Lachman +1
The generation of high Fock states of light pulses and their superpositions with provable quantum non-Gaussian features is still very challenging, although the power of conditional…
Direct estimation of arbitrary observables of an oscillator
Tanjung Krisnanda, Fernando Valadares, Kyle Timothy Ng Chu +6
Quantum harmonic oscillators serve as fundamental building blocks for quantum information processing, particularly in the context of the bosonic circuit quantum electrodynamics (cQ…
Hierarchical Verification of Non-Gaussian Coherence in Bosonic Quantum States
Beate E. Asenbeck, Lukáš Lachman, Ambroise Boyer +4
Non-Gaussianity, a distinctive characteristic of bosonic quantum states, is pivotal in advancing quantum networks, fault-tolerant quantum computing, and high-precision metrology. V…
Quantum non-Gaussian coherences of an oscillating atom
A. Kovalenko, L. Lachman, T. Pham +4
Quantum coherence between energy eigenstates of harmonic oscillators is essential for quantum physics. Even the most elementary binary superpositions of the ground and the higher e…
Genuine quantum non-Gaussianity and metrological sensitivity of Fock states prepared in a mechanical resonator
Q. Rumman Rahman, Igor Kladarić, Max-Emanuel Kern +4
Fock states of the quantum harmonic oscillator are fundamental to quantum sensing and information processing, serving as key resources for exploiting bosonic degrees of freedom. He…
Experimental certification of level dynamics in single-photon emitters
Luk\' aš Lachman, Ilya P. Radko, Maxime Bergamin +2
Emitters of single-photons are essential resources for emerging quantum technologies and developed within different platforms including nonlinear optics, atomic and solid-state sys…
Coherence-based operational nonclassicality criteria
Luca Innocenti, Lukas Lachman, Radim Filip
The nonclassicality of quantum states is a fundamental resource for quantum technologies and quantum information tasks in general. In particular, a pivotal aspect of quantum states…
Emergence of super-Poissonian light from indistinguishable single-photon emitters
A. Kovalenko, D. Babjak, A. Lešundák +7
The optical interference constitutes a paramount resource in modern physics. At the scale of individual atoms and photons, it is a diverse concept that causes different coherent ph…
Quantum non-Gaussianity of light and atoms
Lukáš Lachman, Radim Filip
Quantum non-Gaussian states of photons and phonons are conclusive and direct witnesses of higher-than-quadratic nonlinearities in optical and mechanical processes. Moreover, they a…
Single-mode Quantum Non-Gaussian Light from Warm Atoms
Jaromír Mika, Lukáš Lachman, Tomáš Lamich +2
The distributed quantum information processing and hybridization of quantum platforms raises increasing demands on the quality of light-matter interaction and realization of effici…
Quantum non-Gaussianity of multi-phonon states of a single atom
Lukas Podhora, Lukas Lachman, Tuan Pham +4
Quantum non-Gaussian mechanical states from inherently nonlinear quantum processes are already required in a range of applications spanning from quantum sensing up to quantum compu…
Direct detection of quantum non-Gaussian light from a dispersively coupled single atom
Jitendra K. Verma, Lukáš Lachman, Radim Filip
Many applications in quantum communication, sensing and computation need provably quantum non-Gaussian light. Recently such light, witnessed by a negative Wigner function, has been…
Quantum non-Gaussianity criteria based on vacuum probabilities of original and attenuated state
Jaromír Fiurášek, Lukáš Lachman, Radim Filip
Quantum non-Gaussian states represent an important class of highly non-classical states whose preparation requires quantum operations or measurements beyond the class of Gaussian o…
Quantum non-Gaussian Photon Coincidences
Lukáš Lachman, Radim Filip
Photon coincidences represent an important resource for quantum technologies. They expose nonlinear quantum processes in matter and are essential for sources of entanglement. We de…
Nonclassicality detection from few Fock-state probabilities
Luca Innocenti, Lukáš Lachman, Radim Filip
We devise a new class of criteria to certify the nonclassicality of photon- and phonon-number statistics. Our criteria extend and strengthen the broadly used Klyshko's criteria, wh…
Benchmarking photon number resolving detectors
Jan Provazník, Lukáš Lachman, Radim Filip +1
Photon number resolving detectors are the ultimate measurement of quantum optics, which is the reason why developing the technology is getting significant attention in recent years…
Criteria for single photon sources with variable nonclassicality threshold
Lukáš Lachman, Radim Filip
Single photon sources are necessary for optical quantum technology. The nonclassicality of emitted single photons manifests itself in diverse experiments and applications. The appl…
Faithful hierarchy of genuine -photon quantum non-Gaussian light
Lukáš Lachman, Ivo Straka, Josef Hloušek +2
Light is an essential tool for connections between quantum devices and for diagnostic of processes in quantum technology. Both applications deal with advanced nonclassical states b…
Multiphoton nonclassical light from clusters of single-photon emitters
Luo Qi, Mathieu Manceau, Andrea Cavanna +8
We study nonclassical features of multiphoton light emitted by clusters of single-photon emitters. As signatures of nonclassicality, we use violation of inequalities for normalized…
Generation of ideal thermal light in warm atomic vapor
J. Mika, L. Podhora, L. Lachman +5
We present the experimental generation of light with directly observable close-to ideal thermal statistical properties. The thermal light state is prepared using a spontaneous Rama…
Nonclassical light from large ensemble of trapped ions
Petr Obšil, Lukáš Lachman, Tuan Pham +7
The vast majority of physical objects we are dealing with are almost exclusively made of atoms. Due to their discrete level structure, single atoms have proved to be emitters of li…
Deterministic nonclassicality for quantum mechanical oscillators in thermal states
Petr Marek, Lukas Lachman, Lukas Slodicka +1
Quantum nonclassicality is the basic building stone for the vast majority of quantum information applications and methods of its generation are at the forefront of research. One of…
Quantum non-Gaussianity from a large ensemble of single photon emitters
Lukáš Lachman, Radim Filip
Quantum attributes of light have been related to non-classicality so far, i. e. to incompatibility with mixtures of coherent states. The progress in quantum optics indicates that t…
Quantum Non-Gaussian Multiphoton Light
Ivo Straka, Lukáš Lachman, Josef Hloušek +4
We propose an experimental method of recognizing quantum non-Gaussian multiphoton states. This is a native quantum property of Fock states, the fundamental quantum states with a co…