A5072139519- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Neural Networks and Reservoir Computing
- Quantum optics and atomic interactions
- Photonic and Optical Devices
Center for Integrated Quantum Science and Technology
2022-2023
University of Stuttgart
2022-2023
Bell-state projections serve as a fundamental basis for most quantum communication and computing protocols today. However, with current measurement schemes based on linear optics, only two of four Bell states can be identified, which means that the maximum success probability this vital step cannot exceed 50%. Here, we experimentally demonstrate scheme amends original additional modes in form ancillary photons, leads to more complex pattern, ultimately higher 62.5%. Experimentally, achieve...
We study the impact of distinguishability and mixedness, two fundamental properties quantum states, on interference. show that these can influence interference multiple particles in different ways, leading to effects cannot be observed alone. This is demonstrated experimentally by interfering three independent photons pure mixed states observing their multiphoton interference, despite exhibiting same two-photon Hong-Ou-Mandel In addition its relevance, our observation has important...
Quantum teleportation has proven to be fundamental for many quantum information and communication processes. The core concept can exploited in tasks, from the transmission of states, repeaters, computing. However, linear-optical systems, efficiency is directly linked success probability involved Bell-state measurement. In most implementations, this realized by linear optics with an intrinsically limited 50%. Here, we demonstrate surpassing limit. We achieve average fidelity teleported states...
We present the realization of a linear optical Bell-state measurement scheme, surpassing 50 % bound success by utilising ancillary states in linear-optical circuit and discuss possible applications.
Fault-tolerant fusion-based photonic quantum computing (FBQC) greatly relies on entangling two-photon measurements, called fusions. These fusions can be realized using linear-optical projective Bell-state measurements (BSMs). BSMs are limited to a success probability of 50%, reducing the performance FBQC schemes. To improve architectures, boosted BSM scheme taking advantage ancillary entangled photon pairs and 4x4 multiport interferometer has been proposed. This allows increased up 75%. In...
Bell-state projections serve as a fundamental basis for most quantum communication and computing protocols today. However, with current measurement schemes based on linear optics, only two of four Bell states can be identified, which means that the maximum success probability this vital step cannot exceed $50\%$. Here, we experimentally demonstrate scheme amends original additional modes in form ancillary photons, leads to more complex pattern, ultimately higher $62.5\%$. Experimentally,...