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DESCRIPTION:Abstract: Spectral-temporal modes of quantum light have been re
 cognized as a promising platform for quantum information processing (QIP) 
 and metrology [1]. However\, a simple general tool for efficient conversio
 n between spectral-temporal modes is still missing. A phase-only\, i.e. in
 -principle lossless\, approach is required for quantum light. I will show 
 that transformations between spectral-temporal modes can be realized by a 
 single application of arbitrary temporal phase modulation and a single app
 lication of arbitrary spectral phase modulation. The required arbitrary ph
 ases can be found by means of the well-known phase retrieval algorithm\, s
 uch as the Gerchberg-Saxton algorithm. We apply machine learning-based opt
 imization to find slowly varying phases\, opening the way to experimental 
 implementation using wide-bandwidth electro-optic phase modulation [2]. I 
 will also discuss strategies to detect temporal properties of short single
 -photon optical pulses [3\,4].\n[1] M. Karpiński\, A. O. C. Davis\, F. So
 śnicki\, V. Thiel\, B. J. Smith\, “Control and measurement of quantum l
 ight pulses for quantum information science and technology\,” Adv. Quant
 um Technol. 4\, 2000150 (2021).\n\n[2] F. Sośnicki\, M. Mikołajczyk\, A.
  Golestani\, M. Karpiński\, “Interface between picosecond and nanosecon
 d quantum light pulses\,” Nature Photon. 17\, 761 (2023).\n[3] A. Golest
 ani\, A. O. C. Davis\, F. Sośnicki\, M. Mikołajczyk\, N. Treps\, M. Karp
 iński\, “Electro-optic Fourier transform chronometry of pulsed quantum 
 light\,” Phys. Rev. Lett. 129\, 123605 (2022).\n[4] A. Widomski\, M. Ogr
 odnik\, M. Karpiński\, “Efficient detection of multidimensional single-
 photon time-bin superpositions\,” Optica 11\, 926 (2024).\n\nCo-sponsore
 d by: Prof. Nicolas Quesada\n\nSpeaker(s): Michał Karpiński\n\nJ. Armand
  Bombardier J-1035\, Polytechnique Montréal\, Montréal\, Quebec\, Canada
 \, H3T 1J4
LOCATION:J. Armand Bombardier J-1035\, Polytechnique Montréal\, Montréal\
 , Quebec\, Canada\, H3T 1J4
ORGANIZER:Benjamin.crockett@ieee.org
SEQUENCE:106
SUMMARY:Electro-optic spectral-temporal shaping of single-photon pulse
URL;VALUE=URI:https://events.vtools.ieee.org/m/482650
X-ALT-DESC:Description: &lt;br /&gt;&lt;div&gt;&lt;img src=&quot;https://events.vtools.ieee.org
 /vtools_ui/media/display/4bc1f9cf-54e1-4809-ba0e-dff99be83f04&quot;&gt;&lt;/div&gt;\n&lt;di
 v&gt;&amp;nbsp\;&lt;/div&gt;\n&lt;div&gt;&lt;strong&gt;Abstract: &lt;/strong&gt;&lt;span data-olk-copy-sourc
 e=&quot;MessageBody&quot;&gt;Spectral-temporal modes of quantum light have been&amp;nbsp\;&lt;
 span class=&quot;SpellE&quot;&gt;recognized&lt;/span&gt;&amp;nbsp\;as a&amp;nbsp\;&lt;span class=&quot;SpellE
 &quot;&gt;promising&lt;/span&gt;&amp;nbsp\;platform for quantum information&amp;nbsp\;&lt;span clas
 s=&quot;SpellE&quot;&gt;processing&lt;/span&gt;&amp;nbsp\;(QIP) and&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;me
 trology&lt;/span&gt;&amp;nbsp\;[1].&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;However&lt;/span&gt;\, a si
 mple&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;general&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;
 tool&lt;/span&gt;&amp;nbsp\;for efficient conversion&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;betw
 een&lt;/span&gt;&amp;nbsp\;spectral-temporal modes&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;is&lt;/sp
 an&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;still&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;mis
 sing&lt;/span&gt;. A phase-&lt;span class=&quot;SpellE&quot;&gt;only&lt;/span&gt;\, i.e. in-&lt;span clas
 s=&quot;SpellE&quot;&gt;principle&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;lossless&lt;/span&gt;\,&amp;n
 bsp\;&lt;span class=&quot;SpellE&quot;&gt;approach&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;is&lt;/s
 pan&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;required&lt;/span&gt;&amp;nbsp\;for quantum light. I
 &amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;will&lt;/span&gt;&amp;nbsp\;show&amp;nbsp\;&lt;span class=&quot;Spel
 lE&quot;&gt;that&lt;/span&gt;&amp;nbsp\;transformations&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;between&lt;/
 span&gt;&amp;nbsp\;spectral-temporal modes can&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;be&lt;/spa
 n&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;realized&lt;/span&gt;&amp;nbsp\;by a single applicatio
 n of&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;arbitrary&lt;/span&gt;&amp;nbsp\;temporal phase modu
 lation and a single application of&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;arbitrary&lt;/s
 pan&gt;&amp;nbsp\;spectral phase modulation. The&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;requi
 red&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;arbitrary&lt;/span&gt;&amp;nbsp\;phases can&amp;nb
 sp\;&lt;span class=&quot;SpellE&quot;&gt;be&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;found&lt;/span&gt;
 &amp;nbsp\;by&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;means&lt;/span&gt;&amp;nbsp\;of the&amp;nbsp\;&lt;span
  class=&quot;SpellE&quot;&gt;well-known&lt;/span&gt;&amp;nbsp\;phase&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;r
 etrieval&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;algorithm&lt;/span&gt;\,&amp;nbsp\;&lt;span 
 class=&quot;SpellE&quot;&gt;such&lt;/span&gt;&amp;nbsp\;as the&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Gerchbe
 rg-Saxton&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;algorithm&lt;/span&gt;.&amp;nbsp\;&lt;span 
 class=&quot;SpellE&quot;&gt;We&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;apply&lt;/span&gt;&amp;nbsp\;mac
 hine&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;learning-based&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;S
 pellE&quot;&gt;optimization&lt;/span&gt;&amp;nbsp\;to&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;find&lt;/span&gt;
 &amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;slowly&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;varyi
 ng&lt;/span&gt;&amp;nbsp\;phases\,&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;opening&lt;/span&gt;&amp;nbsp\;t
 he&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;way&lt;/span&gt;&amp;nbsp\;to&amp;nbsp\;&lt;span class=&quot;Spell
 E&quot;&gt;experimental&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;implementation&lt;/span&gt;&amp;nb
 sp\;&lt;span class=&quot;SpellE&quot;&gt;using&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;wide-band
 width&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;electro-optic&lt;/span&gt;&amp;nbsp\;phase m
 odulation [2]. I&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;will&lt;/span&gt;&amp;nbsp\;&lt;span class=
 &quot;SpellE&quot;&gt;also&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;discuss&lt;/span&gt;&amp;nbsp\;&lt;span
  class=&quot;SpellE&quot;&gt;strategies&lt;/span&gt;&amp;nbsp\;to&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;dete
 ct&lt;/span&gt;&amp;nbsp\;temporal&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;properties&lt;/span&gt;&amp;nbsp
 \;of short single-photon&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;optical&lt;/span&gt;&amp;nbsp\;p
 ulses [3\,4].&lt;/span&gt;\n&lt;p class=&quot;MsoNormal&quot;&gt;[1] &amp;nbsp\; &amp;nbsp\;M.&amp;nbsp\;&lt;sp
 an class=&quot;SpellE&quot;&gt;Karpiński&lt;/span&gt;\, A. O. C. Davis\, F.&amp;nbsp\;&lt;span clas
 s=&quot;SpellE&quot;&gt;Sośnicki&lt;/span&gt;\, V. Thiel\, B. J. Smith\, &amp;ldquo\;Control and
 &amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;measurement&lt;/span&gt;&amp;nbsp\;of quantum light puls
 es for quantum information science and&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;technolo
 gy&lt;/span&gt;\,&amp;rdquo\; Adv. Quantum&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Technol&lt;/span&gt;
 . 4\, 2000150 (2021).&lt;/p&gt;\n&lt;p class=&quot;MsoNormal&quot;&gt;[2] &amp;nbsp\; &amp;nbsp\;F.&amp;nbsp
 \;&lt;span class=&quot;SpellE&quot;&gt;Sośnicki&lt;/span&gt;\, M.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Mi
 kołajczyk&lt;/span&gt;\, A.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Golestani&lt;/span&gt;\, M.&amp;nb
 sp\;&lt;span class=&quot;SpellE&quot;&gt;Karpiński&lt;/span&gt;\, &amp;ldquo\;Interface&amp;nbsp\;&lt;span
  class=&quot;SpellE&quot;&gt;between&lt;/span&gt;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;picosecond&lt;/span
 &gt;&amp;nbsp\;and&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;nanosecond&lt;/span&gt;&amp;nbsp\;quantum lig
 ht pulses\,&amp;rdquo\; Nature Photon. 17\, 761 (2023).&lt;br&gt;[3] &amp;nbsp\; &amp;nbsp\;
 A.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Golestani&lt;/span&gt;\, A. O. C. Davis\, F.&amp;nbsp\
 ;&lt;span class=&quot;SpellE&quot;&gt;Sośnicki&lt;/span&gt;\, M.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Mik
 ołajczyk&lt;/span&gt;\, N.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Treps&lt;/span&gt;\, M.&amp;nbsp\;&lt;
 span class=&quot;SpellE&quot;&gt;Karpiński&lt;/span&gt;\, &amp;ldquo\;&lt;span class=&quot;SpellE&quot;&gt;Elect
 ro-optic&lt;/span&gt;&amp;nbsp\;Fourier&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;transform&lt;/span&gt;&amp;
 nbsp\;&lt;span class=&quot;SpellE&quot;&gt;chronometry&lt;/span&gt;&amp;nbsp\;of&amp;nbsp\;&lt;span class=&quot;
 SpellE&quot;&gt;pulsed&lt;/span&gt;&amp;nbsp\;quantum light\,&amp;rdquo\; Phys.&amp;nbsp\;&lt;span clas
 s=&quot;SpellE&quot;&gt;Rev&lt;/span&gt;.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Lett&lt;/span&gt;. 129\, 12360
 5 (2022).&lt;br&gt;[4] &amp;nbsp\; &amp;nbsp\;A.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Widomski&lt;/sp
 an&gt;\, M. Ogrodnik\, M.&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Karpiński&lt;/span&gt;\, &amp;ldq
 uo\;Efficient&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;detection&lt;/span&gt;&amp;nbsp\;of&amp;nbsp\;&lt;
 span class=&quot;SpellE&quot;&gt;multidimensional&lt;/span&gt;&amp;nbsp\;single-photon time-bin s
 uperpositions\,&amp;rdquo\;&amp;nbsp\;&lt;span class=&quot;SpellE&quot;&gt;Optica&lt;/span&gt; 11\, 926 
 (2024).&lt;/p&gt;\n&lt;/div&gt;
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