A programmable qudit-based quantum processor

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: March 4, 2022

Abstract Controlling and programming quantum devices to process information by the unit of dit, i.e., qudit, provides possibilities for noise-resilient communications, delicate molecular simulations, efficient computations, showing great potential enhance capabilities qubit-based technologies. Here, we report a programmable qudit-based processor in silicon-photonic integrated circuits demonstrate its enhancement computational parallelism. The monolithically integrates all key functionalities initialisation, manipulation, measurement two quart (ququart) states multi-value quantum-controlled logic gates with high-level fidelities. By reprogramming configuration processor, implemented most basic Fourier transform algorithms, quaternary, benchmark parallelism using qudits, which include generalised Deutsch-Jozsa Bernstein-Vazirani quaternary phase estimation fast factorization algorithms. monolithic integration high programmability have allowed implementations more than one million high-fidelity preparations, operations projections qudit processor. Our work shows an photonic technology computing enhanced capacity, accuracy, efficiency, could lead acceleration building large-scale computer.

Language: Английский

---

Multi‐Wavelength Quantum Light Sources on Silicon Nitride Micro‐Ring Chip

Laser & Photonics Review, Journal Year: 2023, Volume and Issue: 17(10)

Published: Sept. 3, 2023

Abstract Multi‐wavelength quantum light sources are extremely desired in establishing communication links among multiple users for realizing networks. Despite recent impressive advances, developing such a source with high quality remains challenging. Here multi‐wavelength using silicon nitride micro‐ring free spectral range of 200 GHz is demonstrated. The generation eight‐wavelength‐paired photon pairs ensured wavelength 25.6 nm. With device optimization and noise‐rejecting filters, this enables the heralded single‐photons at rate 62 kHz energy‐time entangled photons visibility Franson interferometer. These results, room temperature telecom wavelength, CMOS‐compatible platform, represent an important step toward integrated photonic devices, which pave way large‐scale network.

Language: Английский

---

Demonstration of dynamical control of three-level open systems with a superconducting qutrit

New Journal of Physics, Journal Year: 2022, Volume and Issue: 24(6), P. 063031 - 063031

Published: June 1, 2022

Abstract We propose a method for the dynamical control in three-level open systems and realize it experiment with superconducting qutrit. Our work demonstrates that Markovian environment relatively long time (3 μ s), systemic populations or coherence can still strictly follow preset evolution paths. This is first precisely controlling dynamics of systems, providing solid foundation future realization multiple systems. An instant application technique demonstrated this to stabilize energy quantum batteries.

Language: Английский

---

Deterministic photon source interfaced with a programmable silicon-nitride integrated circuit

npj Quantum Information, Journal Year: 2023, Volume and Issue: 9(1)

Published: Sept. 25, 2023

Abstract We develop a quantum photonic platform that interconnects high-quality dot single-photon source and low-loss integrated circuit made in silicon nitride. The is characterized programmed to demonstrate various multiphoton applications, including bosonic suppression laws entanglement generation. results show promising technological route forward scale-up hardware.

Language: Английский

---

Dissipative stabilization of high-dimensional GHZ states for neutral atoms

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(11)

Published: March 11, 2024

High-dimensional quantum entanglement characterizes the of systems within a larger Hilbert space, introducing more intricate and complex correlations among entangled particles' states. The high-dimensional Greenberger–Horne–Zeilinger (GHZ) state, symbolic this type entanglement, is significant importance in various information processing applications. This study proposes integrating neutral atom platform with reservoir engineering to generate GHZ state deterministically. Leveraging advantages atoms modified unconventional Rydberg pumping mechanism, combined controlled dissipation, we achieve three-dimensional fidelity surpassing 99% through multiple pump dissipation cycles. innovative approach paves way for experimentally feasible, deterministic preparation states systems, thereby advancing capabilities processing.

Language: Английский

---

High-dimensional discrete Fourier transform gates with a quantum frequency processor

Optics Express, Journal Year: 2022, Volume and Issue: 30(6), P. 10126 - 10126

Published: March 4, 2022

The discrete Fourier transform (DFT) is of fundamental interest in photonic quantum information, yet the ability to scale it high dimensions depends heavily on physical encoding, with practical recipes lacking emerging platforms such as frequency bins. In this article, we show that d-point frequency-bin DFTs can be realized a fixed three-component processor (QFP), simply by adding electro-optic modulation signals one radio-frequency harmonic per each incremental increase d. We verify gate fidelity FW>0.9997 and success probability PW>0.965 up d = 10 numerical simulations, experimentally implement solution for 3, utilizing measurements parallel quantify entanglement perform tomography multiple two-photon states. Our results furnish new opportunities high-dimensional protocols communications networking.

Language: Английский

---

Digital Discovery of 100 diverse Quantum Experiments with PyTheus

Quantum, Journal Year: 2023, Volume and Issue: 7, P. 1204 - 1204

Published: Dec. 12, 2023

Photons are the physical system of choice for performing experimental tests foundations quantum mechanics. Furthermore, photonic technology is a main player in second revolution, promising development better sensors, secure communications, and quantum-enhanced computation. These endeavors require generating specific states or efficiently tasks. The design corresponding optical experiments was historically powered by human creativity but recently being automated with advanced computer algorithms artificial intelligence. While several computer-designed have been experimentally realized, this approach has not yet widely adopted broader optics community. roadblocks consist most systems closed-source, inefficient, targeted to very use-cases that difficult generalize. Here, we overcome these problems highly-efficient, open-source digital discovery framework PyTheus, which can employ wide range devices from modern labs solve various This includes highly entangled states, measurement schemes, communication protocols, multi-particle gates, as well optimization continuous discrete properties states. PyTheus produces interpretable designs complex researchers often readily conceptualize. an example powerful lead scientific discoveries – one core goals intelligence science. We hope it will help accelerate provide new ideas hardware technology.

Language: Английский

---

Integrated preparation and manipulation of high-dimensional flying structured photons

eLight, Journal Year: 2024, Volume and Issue: 4(1)

Published: June 29, 2024

Abstract The hope for a futuristic global quantum internet that provides robust and high-capacity information transfer lies largely on qudits, the fundamental carriers prepared in high-dimensional superposition states. However, preparing manipulating N-dimensional flying qudits as well subsequently establishing their entanglement are still challenging tasks, which require precise simultaneous maneuver of 2 (N-1) parameters across multiple degrees freedom. Here, using an integrated approach, we explore synergy from two freedom light, spatial mode polarization, to generate, encode, manipulate structured photons formed four-dimensional Hilbert space with high fidelity, intrinsically enabling enhanced noise resilience higher data rates. four eigen spin–orbit modes our possess identical spatial–temporal characteristics terms intensity distribution group velocity, thereby preserving long-haul coherence within entirety transmission link. Judiciously leveraging bi-photon entanglement, is preserved manipulation process, present versatile cluster states extensive dimensional space. Such hold promise error correction can further bolster channel robustness long-range communication.

Language: Английский

---

Advances in Chip‐Scale Quantum Photonic Technologies

Advanced Quantum Technologies, Journal Year: 2021, Volume and Issue: 4(12)

Published: Nov. 9, 2021

Abstract Quantum photonic system has made remarkable achievements in computing and communication. Serving as quantum information carriers, photons are flying qubits robust against decoherence, emerging a desirable platform to make processor reality. However, with system's complexity functionality scaling up, the requirements for stability, programmability, manufacturability will be high demand. Integrated photonics, compatible complementary metal‐oxide‐semiconductor fabrication, overwhelming dominance terms of density performance, making it an unrivaled contender large‐scale processing (QIP). To improve performance individual blocks integrate them on common substrate is one core tasks practical processor. Here, recent advances components that constitute systems silicon photonics platform, including sources, modulators, detectors reviewed. Burgeoning applications, such multi‐dimensional, multi‐photon QIP integrated key distribution highlighted.

Language: Английский

---

High-dimensional quantum information processing on programmable integrated photonic chips

Science China Information Sciences, Journal Year: 2023, Volume and Issue: 66(8)

Published: May 25, 2023

Language: Английский

---