SU(N) symmetry of coherent photons controlled by rotated waveplates DOI Creative Commons
Shinichi Saito

Heliyon, Год журнала: 2024, Номер 10(14), С. e34423 - e34423

Опубликована: Июль 1, 2024

The coherent state from a laser source has spin and orbital degrees of freedom, which allow an arbitrary superposition among orthogonal states with varying amplitudes phases. Here, we theoretically show photons SU(N) symmetry are characterised by expectation values angular momentum shown on hypersphere in SO(N2−1) space. To demonstrate expected unitary transformations experiments, have constructed generators the Lie group simply combining widely available optical components such as waveplates vortex lenses. We between twisted Gaussian is dynamics topological charge upon transformation SU(3) states. also realised photonic singlet triplet corresponding to SU(4) states, were projected SU(2)×SU(2) passing through rotated polariser.

Язык: Английский

Active SU(2) operation on Poincaré sphere DOI Creative Commons
Shinichi Saito

Results in Physics, Год журнала: 2024, Номер 59, С. 107567 - 107567

Опубликована: Март 12, 2024

Язык: Английский

Процитировано

4

Photonic Angular Momentum in Intense Light–Matter Interactions DOI Creative Commons

Alex Schimmoller,

Spencer Walker, Alexandra S. Landsman

и другие.

Photonics, Год журнала: 2024, Номер 11(9), С. 871 - 871

Опубликована: Сен. 17, 2024

Light contains both spin and orbital angular momentum. Despite contributing equally to the total photonic momentum, these components derive from quite different parts of electromagnetic field profile, namely its polarization spatial variation, respectively, therefore do not always share equal influence in light–matter interactions. With growing interest utilizing light’s momentum practice added control study atomic systems, it becomes increasingly important for students researchers understand subtlety involved In this article, we present a review fundamental concepts recent experiments related interaction beams containing with atoms. An emphasis is placed on understanding perspective classical waves individual photons. We then application experiments, single- few-photon transitions, strong-field ionization, high-harmonic generation, highlighting role atom’s location within beam profile each case.

Язык: Английский

Процитировано

4

Dirac equation for photons in a fibre: Origin of polarisation DOI Creative Commons
Shinichi Saito

Heliyon, Год журнала: 2024, Номер 10(7), С. e28367 - e28367

Опубликована: Март 22, 2024

Язык: Английский

Процитировано

2

Spin textures of coherent photons with SU(4) symmetry DOI Creative Commons
Shinichi Saito

Results in Physics, Год журнала: 2024, Номер 61, С. 107745 - 107745

Опубликована: Май 9, 2024

We show coherent photons with spin and orbital angular momentum have symmetry of special unitary group degree four, SU(4), both theoretically experimentally. the polarisation could be a measure to characterise quantum coherency state, which was significantly affected by partial trace out freedom. By changing amplitudes classically entangled we observed crossover from Heisenberg classical Ising spin. also demonstrated projections states, recover while SU(4) state is projected simple product SU(2)×SU(2). Based on developed platform, explored texture photons, found unique profile reminiscent Bengal cat upon wrapping three-dimensional sphere. controlled phase between singlet triplet states rotated increasing phase.

Язык: Английский

Процитировано

0

SU(N) symmetry of coherent photons controlled by rotated waveplates DOI Creative Commons
Shinichi Saito

Heliyon, Год журнала: 2024, Номер 10(14), С. e34423 - e34423

Опубликована: Июль 1, 2024

The coherent state from a laser source has spin and orbital degrees of freedom, which allow an arbitrary superposition among orthogonal states with varying amplitudes phases. Here, we theoretically show photons SU(N) symmetry are characterised by expectation values angular momentum shown on hypersphere in SO(N2−1) space. To demonstrate expected unitary transformations experiments, have constructed generators the Lie group simply combining widely available optical components such as waveplates vortex lenses. We between twisted Gaussian is dynamics topological charge upon transformation SU(3) states. also realised photonic singlet triplet corresponding to SU(4) states, were projected SU(2)×SU(2) passing through rotated polariser.

Язык: Английский

Процитировано

0