Xiu-Ping Xie
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View article: Realization of an untrusted intermediate relay architecture using a quantum dot single-photon source
Realization of an untrusted intermediate relay architecture using a quantum dot single-photon source Open
View article: Electrically pumped ultrabright entangled photons on chip
Electrically pumped ultrabright entangled photons on chip Open
Entangled photon sources (EPS) are essential for quantum science and technology. Despite advancements in integrated optical platforms like thin-film lithium niobate, a scalable, high-performance, chip-scale EPS has remained elusive. We add…
View article: A hyperfine-transition-referenced vector spectrum analyzer for visible-light integrated photonics
A hyperfine-transition-referenced vector spectrum analyzer for visible-light integrated photonics Open
View article: Silicon single-photon detector achieving over 84% photon detection efficiency with flexible operation modes
Silicon single-photon detector achieving over 84% photon detection efficiency with flexible operation modes Open
Silicon single-photon detectors (Si SPDs) play a crucial role in detecting single photons in the visible spectrum. For various applications, photon detection efficiency (PDE) is the most critical characteristic for effectively collecting p…
View article: Ultrabright Entanglement Based Quantum Key Distribution over a 404 km Optical Fiber
Ultrabright Entanglement Based Quantum Key Distribution over a 404 km Optical Fiber Open
Entangled photons are crucial resources for quantum information processing. Here, we present an ultrabright polarization-entangled photon source based on a periodically poled lithium niobate waveguide designed for practical quantum communi…
View article: Entangling quantum memories over 420 km in fiber
Entangling quantum memories over 420 km in fiber Open
Long-distance entanglement is pivotal for quantum communication, distributed quantum computing and sensing. Significant progresses have been made in extending the distribution distance of entangled photons, either in free space or fiber. F…
View article: An alkali-referenced vector spectrum analyzer for visible-light integrated photonics
An alkali-referenced vector spectrum analyzer for visible-light integrated photonics Open
Integrated photonics has reformed our information society by offering on-chip optical signal synthesis, processing and detection with reduced size, weight and power consumption. As such, it has been successfully established in the near-inf…
View article: A multinode quantum network over a metropolitan area
A multinode quantum network over a metropolitan area Open
Towards realizing the future quantum internet, a pivotal milestone entails the transition from two-node proof-of-principle experiments conducted in laboratories to comprehensive, multi-node setups on large scales. Here, we report on the de…
View article: Data for "A multinode quantum network over a metropolitan area"
Data for "A multinode quantum network over a metropolitan area" Open
This dataset is for the research article "A multinode quantum network over a metropolitan area".
View article: Data for "A multinode quantum network over a metropolitan area"
Data for "A multinode quantum network over a metropolitan area" Open
This dataset is for the research article "A multinode quantum network over a metropolitan area".
View article: Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips
Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips Open
The lithium niobate on insulator (LNOI) platform has revolutionized lithium niobate materials, and a series of quantum photonic chips have exhibited unprecedented performances. Quantum frequency conversion (QFC) that enables quantum state …
View article: Frequency-Multiplexed Storage and Distribution of Narrowband Telecom Photon Pairs over a 10-km Fiber Link with Long-Term System Stability
Frequency-Multiplexed Storage and Distribution of Narrowband Telecom Photon Pairs over a 10-km Fiber Link with Long-Term System Stability Open
The ability to transmit quantum states over long distances is a fundamental\nrequirement of the quantum internet and is reliant upon quantum repeaters.\nQuantum repeaters involve entangled photon sources that emit and deliver\nphotonic ent…
View article: Quantum interference with independent single-photon sources over 300 km fiber
Quantum interference with independent single-photon sources over 300 km fiber Open
In the quest to realize a scalable quantum network, semiconductor quantum dots (QDs) offer distinct advantages, including high single-photon efficiency and indistinguishability, high repetition rate (tens of gigahertz with Purcell enhancem…
View article: Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips
Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips Open
In the past few years, the lithium niobate on insulator (LNOI) platform has revolutionized lithium niobate materials, and a series of quantum photonic chips based on LNOI have shown unprecedented performances. Quantum frequency conversion …
View article: Entangling metropolitan-distance separated quantum memories
Entangling metropolitan-distance separated quantum memories Open
Quantum internet gives the promise of getting all quantum resources connected, and it will enable applications far beyond a localized scenario. A prototype is a network of quantum memories that are entangled and well separated. Previous re…
View article: Improved Spatial Resolution Achieved by Chromatic Intensity Interferometry
Improved Spatial Resolution Achieved by Chromatic Intensity Interferometry Open
Interferometers are widely used in imaging technologies to achieve enhanced spatial resolution, but require that the incoming photons be indistinguishable. In previous work, we built and analyzed color erasure detectors, which expand the s…
View article: Non-Line-of-Sight Imaging with Picosecond Temporal Resolution
Non-Line-of-Sight Imaging with Picosecond Temporal Resolution Open
Non-line-of-sight (NLOS) imaging enables monitoring around corners and is promising for diverse applications. The resolution of transient NLOS imaging is limited to a centimeter scale, mainly by the temporal resolution of the detectors. He…
View article: Quantum interference between independent solid-state single-photon sources separated by 300 km fiber
Quantum interference between independent solid-state single-photon sources separated by 300 km fiber Open
In the quest to realize a scalable quantum network, semiconductor quantum dots (QDs) offer distinct advantages including high single-photon efficiency and indistinguishability, high repetition rate (tens of GHz with Purcell enhancement), i…
View article: Chromatic interferometry with small frequency differences
Chromatic interferometry with small frequency differences Open
By developing a ‘two-crystal’ method for color erasure, we can broaden the scope of chromatic interferometry to include optical photons whose frequency difference falls outside of the 400 nm to 4500 nm wavelength range, which is the passba…
View article: Optimizing up-conversion single-photon detectors for quantum key distribution
Optimizing up-conversion single-photon detectors for quantum key distribution Open
High-performance single-photon detectors (SPDs) at 1550-nm band are critical for fiber-based quantum communications. Among many types of SPDs, the up-conversion SPDs based on periodically poled lithium niobate waveguides are of great inter…
View article: Monolithic photonic chips for multi-channel frequency mixers and single photon detectors
Monolithic photonic chips for multi-channel frequency mixers and single photon detectors Open
Lithium niobate photonic chip could realize diverse optical engineering for various applications benefiting from its excellent optical performances. In this letter, we demonstrate monolithic photonic chips for multi-channel sum-frequency c…
View article: Color Erasure Detectors Enable Chromatic Interferometry
Color Erasure Detectors Enable Chromatic Interferometry Open
By engineering and manipulating quantum entanglement between incoming photons and experimental apparatus, we construct single-photon detectors which cannot distinguish between photons of very different wavelengths. These color-erasure dete…
View article: Entanglement of two quantum memories via metropolitan-scale fibers
Entanglement of two quantum memories via metropolitan-scale fibers Open
Quantum internet will enable a number of revolutionary applications, such as distributed quantum computing, large-scale quantum communication and cooperative operation of atomic clocks. It relies on entanglement of remote quantum memories …
View article: Compact all-fiber polarization-independent up-conversion single-photon detector
Compact all-fiber polarization-independent up-conversion single-photon detector Open
View article: Upconversion single-photon detectors based on integrated periodically poled lithium niobate waveguides [Invited]
Upconversion single-photon detectors based on integrated periodically poled lithium niobate waveguides [Invited] Open
We demonstrate up-conversion single-photon detectors based on integrated\nperiodically poled lithium niobate waveguides, which incorporate two mode\nfilters and a directional coupler. The two mode filters are optimized for the\nfiber-waveg…
View article: Ultrabright narrow-band telecom two-photon source for long-distance quantum communication
Ultrabright narrow-band telecom two-photon source for long-distance quantum communication Open
We demonstrate an ultrabright narrow-band two-photon source at the 1.5 -\\mu m\ntelecom wavelength for long-distance quantum communication. By utilizing a\nbow-tie cavity, we obtain a cavity enhancement factor of $4.06\\times 10^4$. Our\nm…
View article: 1064-μm-band up-conversion single-photon detector
1064-μm-band up-conversion single-photon detector Open
Based on the technique of periodically poled lithium niobate waveguide, up-conversion single-photon detection at 1.064-μm is demonstrated. We have achieved a system photon detection efficiency of 32.5% with a very low noise count rate of 4…
View article: Integrated four-channel all-fiber up-conversion single-photon-detector with adjustable efficiency and dark count
Integrated four-channel all-fiber up-conversion single-photon-detector with adjustable efficiency and dark count Open
Up-conversion single photon detector (UCSPD) has been widely used in many research fields including quantum key distribution, lidar, optical time domain reflectrometry, and deep space communication. For the first time in laboratory, we hav…
View article: Brillouin optical time-domain reflectometry using up-conversion single-photon detector
Brillouin optical time-domain reflectometry using up-conversion single-photon detector Open