Quantum and nonlinear optics

In the area of quantum and nonlinear optics, mainly the topics related to generation, transmission, detection and quantum processing of information are treated, using the fields of photon pairs obtained by parametric downconversion as the main tool. 

Several proposals of novel sources of photon pairs based on various photonic structures have been published, including randomly poled nonlinear crystals (Opt. Express 2010, 18, 27130), Bragg reflection waveguides (Opt. Express 2011, 19, 3115), ring-fibers (Opt. Express 2014, 22, 23743), or metal-dielectric structures (Phys. Rev. A 2014, 90, 043844). Such sources offer substantial advantages over traditional sources based on bulk nonlinear crystals, usable, e.g., in future metrological and quantum-information schemes. Besides higher compactness and better intensity-to-volume ratio, they may yield paired fields with extremely broad spectra, highly-dimensional entanglement, or pairs entangled in multiple quantities including orbital angular momentum. Some of the proposed sources have been experimentally constructed and tested. In this area works have been done in close cooperation with the Institute of Photonic Sciences, ICFO, Barcelona, Spain. 

In the area of quantum information processing, main effort has been exerted on design and construction of elements for manipulation of quantum states based on linear optics. These include controlled phase gate (Phys. Rev. Lett. 2011, 106, 013602), entangling efficiency of quantum gates (Phys. Rev. A 2012, 86, 032321), cloning of quantum bits (Phys. Rev. A 2012, 85, 050307) and cloning-based eavesdropping on quantum channels (Phys. Rev. Lett. 2013, 110, 173601), quantum routing (Phys. Rev. A 2013, 87, 062333) and amplification of quantum bits (Phys. Rev. A 2013, 87, 012327). The effects of the environment on the transmission of quantum states have also been investigated (Phys. Rev. A 2012, 85, 063807). Most of these schemes have been experimentally realized in our laboratories. They may constitute elements of future quantum communication networks.

In the area of detection, approaches employing intensified CCD cameras have been developed to gain a general tool for investigation of photon-number, spatial and spectral correlations in the fields of photons pairs. These were used to investigate in detail the correlations of twin-photons from the process of parametric downconversion both at the single-photon level (Phys. Rev. A 2010, 81, 043827, Phys. Rev. A 2012, 85, 023816) and at the level of strong fields (Opt. Express 2014, 22, 13374). Using the photon-number entanglement, a method for calibration of quantum detection efficiency without the need of any radiation standard has been developed (Opt. Lett. 2012, 37, 2475) and later extended to detectors with analog output (Appl. Phys. Lett. 2014, 104, 041113) and to obtain the whole spectral calibration curve (J. Opt. Soc. Am. B 2014, 31, B1-B7). Efficient preparation of nonclassical states of light by postselection from photon pairs has also been presented (Opt. Express 2013, 21, 19387, Phys. Rev. A 2013, 88, 062304). Some of these works have been performed in cooperation with University of Insubria, Como, Italy.

Latest publications of the group

  • Jirakova, K; Barasinski, A; Cernoch, A; Lemr, K; Soubusta, J: Measuring Concurrence in Qubit Werner States Without an Aligned Reference Frame, Phys. Rev. Appl. 16 (5) 54042 (2021).
  • Perina, J; Michalek, V; Machulka, R; Haderka, O: Two-beam light with 'checkered-pattern' photon-number distributions, Opt. Express 29 (19) , 29704 - 29719 (2021).
  • Perina, J; Cernoch, A; Soubusta, J: Compound Twin Beams Without the Need of Genuine Photon-Number-Resolving Detection, Phys. Rev. Appl. 16 (2) 24061 (2021).
  • Perina, J; Michalek, V; Machulka, R; Haderka, O: Two-beam light with simultaneous anticorrelations in photon-number fluctuations and sub-Poissonian statistics, Phys. Rev. A 104 (1) 13712 (2021).
  • Arkhipov, II; Minganti, F; Miranowicz, A; Nori, F: Generating high-order quantum exceptional points in synthetic dimensions, Phys. Rev. A 104 (1) 12205 (2021).

Group of quantum and nonlinear optics

Name Role Room Phone (++420 58 563 ...) ORCID Researcher ID
Mgr. Ievgen Arkhipov Ph.D. researcher 309 1557 0000-0001-6547-8855 A-9602-2017
Mgr. Artur Barasiński Ph.D. researcher 309 1557 0000-0003-2165-5412
Mgr. Karol Bartkiewicz Ph.D. researcher 309 1557 0000-0002-5355-7756 H-5378-2012
Mgr. Antonín Černoch Ph.D. researcher 322 1549, 1541 0000-0001-6331-286X G-5971-2014
doc. RNDr. Ondřej Haderka Ph.D. researcher / head of the laboratory 246 1511 0000-0002-6587-4812 G-6313-2014
Mgr. Kateřina Jiráková Ph.D. student 302 4158 0000-0002-9429-4024
Mgr. Josef Kadlec Ph.D. student 310 0000-0002-6438-5443
Ing. Jaromír Křepelka CSc. researcher / journal editor 242 1516 0000-0003-0684-0775
doc. Karel Lemr Ph.D. researcher 322 1547, 1541 0000-0003-4371-3716 G-5641-2014
RNDr. Antonín Lukš researcher 313 4285 0000-0002-2497-5457
Mgr. Radek Machulka Ph.D. researcher 320 1692 0000-0002-8749-1185
Ing. Bc. Václav Michálek Ph.D. researcher 312 1510, 1543, 1558 0000-0003-2569-9471 G-5956-2014
prof. RNDr. Jan Peřina DrSc. researcher 212 4264 0000-0002-8175-292X
prof. RNDr. Jan Peřina Ph.D. researcher / head of the group 321 1509 0000-0003-0542-7508 G-5700-2014
prof. Vlasta Peřinová researcher 314 4263 0000-0001-5571-7074
Mgr. Jan Roik Ph.D. student 316 1536
doc. RNDr. Jan Soubusta Ph.D. researcher 323 1509 0000-0002-5867-4919 G-4875-2013
Bc. Jindřich Švihel researcher 324 4284 0000-0003-4066-2220 AAA-8456-2020
Mgr. Jiří Svozilík Ph.D. researcher 320 1692 0000-0002-3115-7583
Kishore Thapliyal Ph.D. researcher 316 1536 0000-0002-4477-6041 AAH-3564-2019
Mgr. Vojtěch Trávníček Ph.D. student 302 4158 0000-0001-7267-5603