Jaroslav Kysela
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View article: Visibility Stokes parameters as a foundation for quantum information science with undetected photons
Visibility Stokes parameters as a foundation for quantum information science with undetected photons Open
The framework of measurement operators plays a fundamental role in extracting information about quantum systems. Recently, techniques based on induced coherence have been developed to access the same information for undetected photons. How…
View article: Subjective nature of path information in quantum mechanics
Subjective nature of path information in quantum mechanics Open
Common sense suggests that a particle must have a definite origin if its full path information is available. In quantum mechanics, the knowledge of path information is captured through the well-established duality relation between path dis…
View article: Visibility Stokes parameters as a foundation for quantum information science with undetected photons
Visibility Stokes parameters as a foundation for quantum information science with undetected photons Open
The framework of measurement operators plays a fundamental role in extracting information about quantum systems. Recently, techniques based on induced coherence have been developed to access the same information for undetected photons. How…
View article: State independent QKD
State independent QKD Open
We present an adaptive procedure for aligning quantum non-locality experiments without any knowledge of the two-qudit state shared by the participating parties. The quantum state produced by the source, its unitary evolution as well as the…
View article: Quantum state tomography of undetected photons
Quantum state tomography of undetected photons Open
The measurement of quantum states is one of the most important problems in quantum mechanics. We introduce a quantum state tomography technique in which the state of a qubit is reconstructed, while the qubit remains undetected. The key ing…
View article: Arbitrary unitaries in orbital angular momentum of single photons
Arbitrary unitaries in orbital angular momentum of single photons Open
A simple argument is presented that explicitly shows how to construct an arbitrary quantum gate acting on orbital angular momentum (OAM) of single photons. The scheme can be applied to implement subspace multiplexing, where a single high-d…
View article: High-dimensional quantum Fourier transform of twisted light
High-dimensional quantum Fourier transform of twisted light Open
The Fourier transform proves indispensable in the processing of classical\ninformation as well as in the quantum domain, where it finds many applications\nranging from state reconstruction to prime factoring. An implementation scheme\nof t…
View article: Parallelization of high-dimensional single-photon quantum gates
Parallelization of high-dimensional single-photon quantum gates Open
Local quantum gates represent the basic building blocks of quantum computers. In the photonic domain, these gates act on individual photons and are usually implemented as single optical devices. In cases when the same gate is to be applied…
View article: High-dimensional Fourier transform of twisted light
High-dimensional Fourier transform of twisted light Open
The Fourier transform proves indispensable in the processing of classical information as well as in the quantum domain, where it finds many applications ranging from state reconstruction to prime factoring. An implementation scheme of the …
View article: Advanced Linux Sound Architecture (ALSA) The future for the Linux sound!?
Advanced Linux Sound Architecture (ALSA) The future for the Linux sound!? Open
The Advanced Linux Sound Architecture (ALSA) [1] project was founded by Jaroslav Kysela at the beginning of 1998 on a non−commercial basis. This project is intended to improve overall Linux sound support. The ALSA proffesional team has bee…
View article: Path identity as a source of high-dimensional entanglement
Path identity as a source of high-dimensional entanglement Open
Significance Quantum entanglement amounts to an extremely strong link between two distant particles, a link so strong that it eludes any classical description and so unsettling that Albert Einstein described it as “spooky action at a dista…
View article: Deterministic twirling with low resources
Deterministic twirling with low resources Open
View article: Arbitrary <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>d</mml:mi></mml:math>-dimensional Pauli <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>X</mml:mi></mml:math> gates of a flying qudit
Arbitrary -dimensional Pauli gates of a flying qudit Open
High-dimensional degrees of freedom of photons can encode more quantum\ninformation than their two-dimensional counterparts. While the increased\ninformation capacity has advantages in quantum applications (such as quantum\ncommunication),…