kth.sePublications KTH
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Engineering Quantum Light in Integrated Photonic Platforms: From Solid-State Emitters to Programmable Quantum Dynamics
KTH, School of Engineering Sciences (SCI), Applied Physics, Light and Matter Physics. (Q-PHOTON — Quantum Photonic Hardware for Optical Technologies and Computing)ORCID iD: 0009-0009-3580-5929
2026 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Quantum mechanics endows light with properties that have no classical analogue - superposition, entanglement, and non-classical photon statistics, that can be harnessed as resources for computing, communication, sensing, and simulation. After decades of foundational research, quantum states of light can now be generated, manipulated, and measured with sufficient precision that their non-classical properties are no longer merely curiosities, but engineerable resources.

Integrated photonics offers a compelling path forward. By confining light in lithographically defined waveguides on a chip, it replaces fragile bulk optical assemblies with compact, phase-stable, and reproducible circuits. Semiconductor quantum dots embedded in photonic nanostructures provide bright, on-demand single-photon emission compatible with waveguide integration, while superconducting nanowire single-photon detectors provide the efficiency and timing precision that quantum optical measurements demand. A particularly powerful frontier is reconfigurability: programmable photonic circuits whose functionality is defined in software can serve as versatile quantum photonic processors without any physical modification.

This dissertation presents work on engineering quantum light across the full chain of generation, control, and detection using integrated photonic platforms. It covers coherent control of nanowire quantum dot emitters, generation of multipartite entangled states on a silicon nitride chip, and the use of programmable silicon-on-insulator interferometers as reconfigurable quantum optical processors for simulating quantum systems.

Abstract [sv]

Kvantmekanik ger ljuset egenskaper som saknar klassisk motsvarighet - superposition, sammanflätning och icke-klassisk fotonstatistik, vilka kan utnyttjas som resurser för beräkning, kommunikation, avkänning och simulering. Efter decennier av grundläggande forskning kan kvanttillstånd av ljus nu genereras, manipuleras och mätas med tillräcklig precision för att deras icke-klassiska egenskaper inte längre är blotta kuriositeter, utan ingenjörsmässigt utnyttjbara resurser.

Integrerad fotonik erbjuder en lovande väg framåt. Genom att begränsa och leda ljus i litografiskt definierade vågledare på ett chip ersätter den sköra bulkoptiska uppställningar med kompakta, fasstabila och reproducerbara kretsar. Halvledarkvanttepunkter inbäddade i fotoniska nanostrukturer ger ljusstark, behovsstyrd enphotonsemission kompatibel med vågledareintegration, medan supraledande nanotråds enphotonsdetektorer ger den effektivitet och tidsprecision som kvantoptiska mätningar kräver. En särskilt kraftfull frontier är rekonfigurbarhet: programmerbara fotoniska kretsar vars funktionalitet definieras i mjukvara kan tjäna som mångsidiga kvantfotoniska processorer utan någon fysisk modifiering.

Denna avhandling presenterar arbete med att konstruera kvantljus längs hela kedjan av generering, kontroll och detektion med hjälp av integrerade fotoniska plattformar. Den täcker koherent kontroll av nanowire kvanttepunktsemittorer, generering av multipartita sammanflätade tillstånd på ett kiselnitridchip, samt användningen av programmerbara kisel-på-isolator-interferometrar som rekonfigurerbara kvantoptiska processorer för simulering av kvantsystem.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2026. , p. 93
Series
TRITA-SCI-FOU ; 2026:09
Keywords [en]
quantum photonics, integrated photonics, single-photon sources, quantum dots, spontaneous parametric down-conversion, superconducting nanowire single-photon detectors, entanglement, quantum simulation, open quantum systems, programmable photonic circuits
Keywords [sv]
kvantefotonik, integrerad fotonik, enfotonstämmor, kvanttprickar, spontan parametrisk nerkonvertering, supraledande nanotrådsenfotondetek-torer, sammanflätning, kvantsimulering, öppna kvantsystem, programmerbara fotoniska kretsar
National Category
Physical Sciences
Research subject
Physics, Optics and Photonics; Physics, Material and Nano Physics
Identifiers
URN: urn:nbn:se:kth:diva-381405ISBN: 978-91-8106-638-8 (print)OAI: oai:DiVA.org:kth-381405DiVA, id: diva2:2060154
Public defence
2026-06-10, Q2, Malvinas väg 10, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20260518

Available from: 2026-05-18 Created: 2026-05-14 Last updated: 2026-05-18Bibliographically approved
List of papers
1. On demand single photon generation and coherent control of excitons from resonantly driven nanowire quantum dots
Open this publication in new window or tab >>On demand single photon generation and coherent control of excitons from resonantly driven nanowire quantum dots
Show others...
2025 (English)In: APL Quantum, E-ISSN 2835-0103, Vol. 2, no 3Article in journal (Refereed) Published
Place, publisher, year, edition, pages
AIP Publishing, 2025
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-381390 (URN)10.1063/5.0282369 (DOI)
Note

QC 20260521

Available from: 2026-05-14 Created: 2026-05-14 Last updated: 2026-05-21Bibliographically approved
2. Scalable Generation and Detection of on-Demand W States in Nanophotonic Circuits
Open this publication in new window or tab >>Scalable Generation and Detection of on-Demand W States in Nanophotonic Circuits
Show others...
2023 (English)In: Nano Letters, ISSN 1530-6984, E-ISSN 1530-6992, Vol. 23, no 11, p. 5350-5357Article in journal (Refereed) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-381402 (URN)10.1021/acs.nanolett.3c01551 (DOI)001016900800001 ()37224010 (PubMedID)2-s2.0-85162839020 (Scopus ID)
Note

QC 20260520

Available from: 2026-05-14 Created: 2026-05-14 Last updated: 2026-09-10Bibliographically approved
3. Emulation of coherent absorption of Fock-state quantum light in a programmable linear photonic circuit
Open this publication in new window or tab >>Emulation of coherent absorption of Fock-state quantum light in a programmable linear photonic circuit
Show others...
2026 (English)In: Nature Communications, E-ISSN 2041-1723, Vol. 17, no 1, article id 4211Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Springer Nature, 2026
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-381366 (URN)10.1038/s41467-026-72850-6 (DOI)001761406800001 ()42106317 (PubMedID)2-s2.0-105038135906 (Scopus ID)
Funder
Knut and Alice Wallenberg Foundation, WACQT
Note

QC 20260521

Available from: 2026-05-14 Created: 2026-05-14 Last updated: 2026-05-21Bibliographically approved
4. Experimental simulation of non-equilibrium quantum piston on a programmable photonic quantum computer
Open this publication in new window or tab >>Experimental simulation of non-equilibrium quantum piston on a programmable photonic quantum computer
Show others...
(English)Manuscript (preprint) (Other academic)
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-381364 (URN)10.48550/arXiv.2603.10647 (DOI)
Note

QC 20260520

Available from: 2026-05-14 Created: 2026-05-14 Last updated: 2026-09-10Bibliographically approved

Open Access in DiVA

fulltext(84158 kB)267 downloads
File information
File name FULLTEXT01.pdfFile size 84158 kBChecksum SHA-512
aeca61321e4e786653b88312c39d44351061afd8a68b586cd787b5d8b8031204aa506afa9f71cb3b3906cad8fcfface9e4295ba56ad0e7e6a2d1cab0e0b4c784
Type fulltextMimetype application/pdf

Authority records

Krishna, Govind

Search in DiVA

By author/editor
Krishna, Govind
By organisation
Light and Matter Physics
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 1761 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf