Article
Multidisciplinary Sciences
Gaurav Nirala, Siva T. Pradyumna, Ashok Kumar, Alberto M. Marino
Summary: The ability to encode and transmit information using the temporal and spatial degrees of freedom of quantum states of light is crucial for an efficient quantum network. However, there is still a lack of control required to fully utilize the high dimensionality of the spatial degree of freedom. In this study, we encode information in the spatial correlations of entangled twin beams, taking advantage of their dependence on the angular spectrum of the pump for four-wave mixing. We demonstrate that the encoded information can only be extracted through joint spatial measurements of the twin beams, without modifying the temporal quantum correlations.
Article
Multidisciplinary Sciences
Lu Chen, Wenqi Zhu, Pengcheng Huo, Junyeob Song, Henri J. Lezec, Ting Xu, Amit Agrawal
Summary: Researchers have proposed a flexible approach to synthesize ultrafast optical transients with arbitrary control over its complete spatiotemporal evolution by leveraging the multifunctional control of light at the nanoscale. This method supports an ultrawide bandwidth with high spectral and spatial resolution, enabling the synthesis of complex states of structured space-time wave packets.
Article
Optics
Ling Hong, Xiyue Cao, Yuanyuan Chen, Lixiang Chen
Summary: In this study, the Hong-Ou-Mandel interference of spin-orbit hybrid photons is observed for the first time. Various forms of spin-orbit hybrid entangled photons are prepared using tunable q-plates as spin-orbit coupler devices. By harnessing the match degree in the temporal domain, the coalescence and anti-coalescence effects are observed, and the feasibility of quantum-enhanced photon polarization gears is demonstrated.
Article
Optics
Zekun Shi, Baiwei Mao, Zhi Wang, Yan-ge Liu
Summary: This paper proposes a simple and accurate method for measuring the mode purity of the output optical field in few mode ring-core fibers (RCFs) and verifies its applicability and accuracy. This method has the potential to promote the development of mode-division multiplexing technology.
PHOTONICS RESEARCH
(2023)
Article
Multidisciplinary Sciences
Isaac Nape, Valeria Rodriguez-Fajardo, Feng Zhu, Hsiao-Chih Huang, Jonathan Leach, Andrew Forbes
Summary: The study presents a method that returns the dimensionality and purity of high-dimensional entangled states simultaneously through simple projective measurements, offering a fast and accurate quantification of quantum system dimensions and purity. The method is demonstrated using different bases, showing the feasibility of quantitative measurements of state dimensionality under various noise levels.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Nuclear
L. M. Robledo
Summary: The existing formalism for computing operator overlaps necessary for generator coordinate method calculations using Hartree-Fock-Bogoliubov wave functions is generalized to include different arbitrary bases spanning different subspaces of the Hilbert space.
Article
Physics, Multidisciplinary
G. Canas, E. S. Gomez, E. Baradit, G. Lima, S. P. Walborn
Summary: Research on increasing the coupling of photon pairs produced by parametric down-conversion by pumping the non-linear crystal with a perfect vortex mode with orbital angular momentum l rather than a gaussian mode has shown an almost three-fold increase in coupling and a nearly constant shape in the two-photon orbital angular momentum spectrum. This presents an interesting scenario for quantum state engineering.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
R. Lange, N. Hunteman, A. A. Peshko, A. Surzhykov, E. Peik
Summary: In this study, we investigate the coherent excitation of the 2S1=2 -> 2F7=2 electric octupole (E3) transition by twisted light modes with a single 171Yb+ ion in a dark center of a vortex beam. We measure the intensity distribution of the beam as a function of the ion's position and observe a fivefold reduced light shift in the excitation of the E3 transition compared to plane wave radiation. Furthermore, we compare the experimental results with theoretical predictions and obtain good qualitative agreement.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Baghdasar Baghdasaryan, Carlos Sevilla-Gutierrez, Fabian Steinlechner, Stephan Fritzsche
Summary: This study derives a general expression for the spatio-temporal biphoton state in common experimental settings, which correctly describes the nonseparability of spatial and spectral modes. By considering the Gouy phase of interacting beams, a criterion on how to decrease the coupling between spatial and spectral degrees of freedom is formulated. This work provides new insights into the role of the Gouy phase in SPDC and the preparation of engineered entangled states for multidimensional quantum information processing.
Article
Optics
Yunkun Wu, Yutao Tang, Zixian Hu, Lantian Feng, Guangcan Guo, Xifeng Ren, Guixin Li
Summary: Optical spin-orbit interaction (SOI), which simultaneously controls the spin and orbital angular momentum of light, is important for classical and quantum information applications. While SOI of light has been extensively studied in linear and nonlinear optics, it has not been explored in quantum nonlinear optical processes such as spontaneous parametric downconversion (SPDC). This study demonstrates that optical SOI in the SPDC process can be achieved through a nonlinear crystal with threefold rotational symmetry, enabling the generation and control of two-photon quantum states with controlled angular momentum.
Article
Optics
Yiming Zhong, Yi Zhang, Xiangdong Zhang, Houjun Sun, Guoqiang Zhao
Summary: This study proposes a new method to simultaneously measure the velocity of a three-dimensional moving object by constructing a modulated field, overcoming the limitations of traditional vortex beams. By decomposing frequency shifts and conducting velocity measurements, experiments show velocity estimation errors lower than 6.0%.
Article
Optics
Pauline Boucher, Hugo Defienne, Sylvain Gigan
Summary: This study demonstrates tunable control of spatial correlations between photon pairs in order to engineer the properties of quantum optical states, measured using an EMCCD camera. By shaping the spatial pump beam profile, the spatial structure of entangled photon pairs in high dimensions was tailored without affecting intensity, holding potential for quantum technologies based on high-dimensional spatial entanglement.
Article
Physics, Applied
G. Ruffato, E. Rotunno, L. M. C. Giberti, V Grillo
Summary: This paper proves that any conformal transformation of a wave can be produced through a cascade of discrete phase elements satisfying Laplace's equation, with the specific implication for charged-matter waves being the use of electrostatic or magnetostatic phase elements. Additionally, the basis for generating such phase elements is shown to be integer and fractional charge multipoles, allowing for efficient sorting of multipole-induced quantum states. The results hold true in optics and for charged-particle beams of sufficient coherence, providing a fast and direct method for measuring dipole systems and astigmatism.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Multidisciplinary
Markus Hiekkamaki, Robert Fickler
Summary: Two-photon interference in multiple transverse-spatial modes along a single beam-path was studied, with observations of coalescence and anticoalescence in different spatial-mode multiports. This operation within spatial modes along a single beam path eliminates the need for interferometric stability and presents new pathways for implementing complex quantum information tasks using linear optical networks.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Jiaqi Yang, Tommi K. Hakala, Ari T. Friberg
Summary: This paper proposes a method to generate vector Bessel beams at any point on a higher-order Poincare (HOP) sphere using a single all-dielectric planar metasurface. The method can achieve high purity of orbital angular momentum modes and is expected to have important applications in optical manipulation and laser beam engineering.
Article
Physics, Multidisciplinary
Christopher J. Gibson, Alison M. Yao, Gian-Luca Oppo
PHYSICAL REVIEW LETTERS
(2016)
Article
Multidisciplinary Sciences
Robert P. Cameron, Jorg B. Gotte, Stephen M. Barnett, Alison M. Yao
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2017)
Article
Optics
Alison M. Yao, Christopher J. Gibson, Gian-Luca Oppo
Article
Physics, Multidisciplinary
Jenny Morgan, Erik Hemsing, Brian W. J. McNeil, Alison Yao
NEW JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Giuseppe Baio, Gordon R. M. Robb, Alison M. Yao, Gian-Luca Oppo, Thorsten Ackemann
Summary: The study shows that the transverse self-structuring of cold atomic clouds can be achieved using effective atomic interactions mediated by a coherent driving beam reflected by a single mirror, resulting in a richer self-structuring behavior than that of an effective-Kerr medium. Different interaction strengths lead to hexagonal, stripe, and honeycomb phases, with the system recovering inversion symmetry in the stripe phase. Additionally, the subcritical character of the honeycomb phase allows for light-density feedback solitons to function as self-sustained dark atomic traps with motion controlled by phase gradients in the driving beam.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Grant W. Henderson, Gordon R. M. Robb, Gian-Luca Oppo, Alison M. Yao
Summary: In this study, we model the propagation of far-red-detuned optical vortex beams through a Bose-Einstein condensate using nonlinear Schrödinger and Gross-Pitaevskii equations. We demonstrate the formation of coupled light-atomic solitons that rotate azimuthally before moving off tangentially, carrying angular momentum. The number and velocity of solitons depend on the orbital angular momentum of the optical field. By using a Bessel-Gauss beam, we increase radial confinement to allow solitons to rotate with a fixed azimuthal velocity. Our model provides a highly controllable method for channeling a BEC and atomic transport.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Robert P. Cameron, Duncan McArthur, Alison M. Yao
Summary: Inspired by a remarkable chiral force found in nature, researchers have demonstrated that a static electric field combined with an optical linear polarization standing wave can exert a chiral optical force on small chiral molecules. This force is much stronger than other proposed chiral optical forces and is based on electric-dipole interactions rather than weak magnetic-dipole and electric-quadrupole interactions. The potential applications include precision metrology, tests of fundamental physics, and resolution of enantiomers in chemistry and biology.
NEW JOURNAL OF PHYSICS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Giuseppe Baio, Gordon R. M. Robb, Thorsten Ackemann, Alison M. Yao, Gian-Luca Oppo
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Giuseppe Baio, Gordon R. M. Robb, Alison M. Yao, Gian-Luca Oppo, Thorsten Ackemann
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Article
Physics, Multidisciplinary
Shaun Viola, Zhaozhong Chen, Alison M. Yao, Manousos Valyrakis, Anthony E. Kelly, David McKee, Martin P. J. Lavery
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Giuseppe Baio, Gordon R. M. Robb, Alison M. Yao, Gian-Luca Oppo
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Duncan McArthur, Alison M. Yao, Francesco Papoff
PHYSICAL REVIEW RESEARCH
(2020)
Article
Optics
Christopher J. Gibson, Patrick Bevington, Gian-Luca Oppo, Alison M. Yao
Proceedings Paper
Engineering, Electrical & Electronic
C. J. Gibson, P. Bevington, G. -L. Oppo, A. M. Yao
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2017)
Article
Optics
Giuseppe Baio, Thorsten Ackemann, Gian-Luca Oppo, Gordon R. M. Robb, Alison M. Yao
Summary: Clouds of cold neutral atoms driven by a coherent light beam in a ring cavity exhibit self-structured states transversely with respect to the beam axis due to optomechanical forces and the backaction of the atomic structures on the beam. Below the instability threshold for extended hexagonal structures, localized soliton-like excitations can be stable. Complex rotating and spiraling motion of coupled atom-light solitons, and hence, atomic transport, can be achieved via phase gradients in the input field profile. The investigations are performed in a cavity scheme but expected to apply to other longitudinally pumped schemes with diffractive coupling.
