Frequency‐Dependent Squeezing via Einstein–Podolsky–Rosen Entanglement Based on Silicon Nitride Microring Resonators DOI Open Access
Haodong Xu,

Zijun Shu,

Nianqin Li

et al.

Advanced Quantum Technologies, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 31, 2024

Abstract Considerable efforts have been devoted to augmenting the performance of displacement sensors constrained by quantum noise, particularly within high‐precision applications such as gravitational wave detection. Frequency‐dependent squeezing methodologies adeptly exceeded standard limit in optomechanical force measurements, catalyzing profound advancements field. Concurrently, notable strides integrated photonics paved way for realization Kerr frequency combs (QFCs). In this work, a sophisticated platform designed creation Einstein–Podolsky–Rosen (EPR)‐entangled QFCs utilizing on‐chip silicon nitride microring resonators is presented. This facilitates an exhaustive analysis and optimization entanglement performance, establishing robust framework noise mitigation. By incorporating dynamics nonlinear microresonators, system accommodates at least 12 continuous‐variable modes, including 6 pairs concurrently EPR‐entangled states. Moreover, through precise tuning detection angle idler mode, signal mode transitions into single‐mode squeezed state. Harnessing frequency‐dependent nature enables achievement squeezing. A comparative under different dispersion conditions also

Language: Английский

Ultralow-Loss Integrated Photonics Enables Bright, Narrowband, Photon-Pair Sources DOI
Ruiyang Chen, Yi-Han Luo,

Jinbao Long

et al.

Physical Review Letters, Journal Year: 2024, Volume and Issue: 133(8)

Published: Aug. 22, 2024

Photon-pair sources are critical building blocks for photonic quantum systems. Leveraging Kerr nonlinearity and cavity-enhanced spontaneous four-wave mixing, chip-scale photon-pair can be created using microresonators built on integrated circuit. For practical applications, a high microresonator quality factor Q is mandatory to magnify sources' brightness reduce their linewidth. The former proportional Q^{4}, while the latter inversely Q. Here, we demonstrate an integrated, microresonator-based, narrowband source. microresonator, made of silicon nitride fabricated standard CMOS foundry process, features ultralow loss down 0.03 dB/cm intrinsic exceeding 10^{7}. source has 1.17×10^{9} Hz/mW^{2}/GHz linewidth 25.9 MHz, both which record values silicon-photonics-based light It further enables heralded single-photon with second-order correlation g_{h}^{(2)}(0)=0.0037(5), as well energy-time entanglement raw visibility 0.973(9). Our work evidences global potential ultralow-loss photonics create novel circuits, catalyzing efficient, compact, robust interfaces communication networks.

Language: Английский

Citations

9
CMOS photonic integrated source of ultrabroadband polarization-entangled photons DOI Creative Commons

Alexander Miloshevsky,

Lucas M. Cohen, Karthik V. Myilswamy

et al.

Optica Quantum, Journal Year: 2024, Volume and Issue: 2(4), P. 254 - 254

Published: July 3, 2024

We showcase a fully on-chip CMOS-fabricated silicon photonic integrated circuit employing bidirectionally pumped microring and polarization splitter-rotators tailored for the generation of broadband (>9 THz), high-fidelity (90–98%) polarization-entangled photons. Spanning optical C+L-band producing over 116 frequency-bin pairs on 38.4-GHz-spaced grid, this source is ideal flex-grid wavelength-multiplexed entanglement distribution in multiuser networks.

Language: Английский

Citations

7
On-chip frequency-bin quantum photonics DOI Creative Commons
Karthik V. Myilswamy, Lucas M. Cohen, Suparna Seshadri

et al.

Nanophotonics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Frequency-bin encoding furnishes a compelling pathway for quantum information processing systems compatible with established lightwave infrastructures based on fiber-optic transmission and wavelength-division multiplexing. Yet although significant progress has been realized in proof-of-principle tabletop demonstrations, ranging from arbitrary single-qubit gates to controllable multiphoton interference, challenges scaling frequency-bin processors larger remain. In this Perspective, we highlight recent advances at the intersection of integrated photonics that are fundamentally transforming outlook scalable frequency-based information. Focusing specifically results sources, state manipulation, hyperentanglement, envision possible future which on-chip circuits fulfill critical roles processing, particularly communications networking.

Language: Английский

Citations

0
Impact of Pulse Chirp and Desynchronization on Chip-Based Pulse-Driven Soliton Microcombs DOI
Chenxi Zhang,

Runlin Miao,

Ke Yin

et al.

ACS Photonics, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Language: Английский

Citations

0
Recent advances in high-dimensional quantum frequency combs DOI Creative Commons
Kai-Chi Chang, Xiang Cheng, Murat Can Sarihan

et al.

Newton, Journal Year: 2025, Volume and Issue: 1(1), P. 100024 - 100024

Published: March 1, 2025

Citations

0
Quantum entanglement network enabled by a state-multiplexing quantum light source DOI Creative Commons

Yunru Fan,

Yue Luo,

Kai Guo

et al.

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: May 12, 2025

Abstract A fully connected quantum network with a wavelength division multiplexing architecture plays an increasingly pivotal role in information technology. With such architecture, entanglement-based has been demonstrated which entangled photon-pair source distributes entanglement resources to many users. Despite these remarkable advances, the scalability of could be constrained by finite spectrum resource, where $${\mathscr{O}}\left({N}^{2}\right)$$ O N 2 channels are needed connect N users, thus impeding further progress real-world scenarios. Here, we propose scheme for using state-multiplexing light source. dual-pump configuration, feasibility our approach is generating photon pairs at multiple silicon nitride microring resonator chip. In demonstration, establish graph between four users six channels—saving half without sacrificing functionality and performance secure communication. total asymptotic key rate 1946.9 bps obtained performing BBM92 protocol distributed state. The topology method great potential developing scalable significantly minimized infrastructure requirements.

Language: Английский

Citations

0
Polarization entanglement generation in silicon nitride waveguide-coupled dual microring resonators DOI Creative Commons
Qianni Zhang, Kaiyi Wu, Andrew W. Poon

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 32(13), P. 22804 - 22804

Published: May 27, 2024

Polarization-entangled photon pair sources exhibiting nonlocal quantum correlations are crucial to developments of computing, communications, cryptography, and sensing technologies. On-chip polarization entanglement generation thus constitutes one enabling component for integrated photonic circuits. Here, we present our knowledge the first polarization-entangled in a silicon nitride platform We demonstrate state by adopting configuration comprising dual microring resonators, with nearly degenerate transverse electric magnetic polarized cavity resonances two resonators coupled series common bus waveguide. measure two-photon interference tomography characterize generated reconstruct density matrix. Our experiments reveal visibility 96.4% ± 3.1% 86.7% 3.2% |H⟩ |V⟩ bases, respectively (and 89.4% 6.6% 81.3% 7.3% |D⟩ |A⟩ bases), fidelity ∼75.7% from tomographic reconstructed

Language: Английский

Citations

3
Discrete and Parallel Frequency‐Bin Entanglement Generation from Quantum Frequency Comb DOI
Lu Chi,

Wu Xiaoyu,

Wenjun Wen

et al.

Advanced Quantum Technologies, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Abstract Photons’ frequency degree of freedom is promising to realize large‐scale quantum information processing. Quantum combs (QFCs) generated in integrated nonlinear microresonators can produce multiple modes with narrow linewidth. Here, polarization‐entangled QFCs are utilized generate discrete frequency‐bin entangled states. Fourteen pairs photons different frequencies simultaneously transformed into The characteristic entanglement demonstrated by Hong‐Ou‐Mandel interference, which be performed single or parallel. This work paves the way for harnessing and converting between degrees

Language: Английский

Citations

2
Parity-time-symmetry-enabled broadband quantum frequency-comb generation DOI
Nuo Chen,

Wu-Qiang Chi,

Yunru Fan

et al.

Physical review. A/Physical review, A, Journal Year: 2024, Volume and Issue: 110(2)

Published: Aug. 13, 2024

Microcavities stand out as competitive tools in the development of quantum frequency combs (QFCs) for multiphoton entanglement sources, frequency-multiplexed single-photon and generation high-dimensional entangled states. However, presence waveguide dispersion hinders creation broadband QFCs, an issue that becomes increasingly critical quality factor microcavity increases. Here, we present a scheme to enhance spectral range QFCs by selectively manipulating pump resonance via parity-time symmetry. We show using pulsed light cover resonance, frequency-matching conditions can be relaxed thus significantly extended near exceptional point. The proposed method offers simple, effective, robust approach increase dimension without severely sacrificing nonlinear efficiency.

Language: Английский

Citations

1
Ultra-compact and low-loss silicon nitride optical mode-size converter DOI
Zanyun Zhang, Chen Meng, Hao Jiang

et al.

Optical Engineering, Journal Year: 2024, Volume and Issue: 63(10)

Published: Oct. 24, 2024

We designed and implemented a compact silicon nitride mode-spot converter that is non-linear stepwise segmented. The with length of 20 μm simulated transmission efficiency 95.7% was obtained using the three-dimensional finite-difference time-domain method particle swarm optimization algorithm. This device can connect 10-μm wide waveguide 1-μm single-mode for O-band operation. Compared linear taper equivalent efficiency, this reduces footprint by 80%. fabricated on platform electron-beam lithography inductively coupled plasma etching processes. exhibits measured average insertion loss 0.30 dB in 1 bandwidth more than 100 nm.

Language: Английский

Citations

0