A polarized photon with well-defined orbital angular momentum that emerges from a Mach-Zehnder interferometer (MZI) is shown to circumvent wave-particle duality. Its polarization-resolved detection probability forms a non-sinusoidal interferometric pattern. For certain phase differences between the MZI arms, this pattern yields both reliable which-path information and high phase-sensitivity.
Induced Coherence in Quantum and Classical Interferometry: Origin and Control
The Institute of Mathematical Sciences（马蒂马拉科学院）；Homi Bhabha National Institute（霍米·巴巴国立学院）；Institute of Science, Banaras Hindu University（贝拿勒斯印度教大学理学院）；Centre for Quantum Science and Technology, Siksha ‘O’ Anusandhan（锡克沙'O'安苏丹量子科学与技术中心）；Indian Institute of Science Education and Research (IISER), Kolkata（加尔各答印度科学教育与研究学院）
We report the first realization of large momentum transfer (LMT) clock atom interferometry. Using single-photon interactions on the strontium ${}^1S_0 - {}^3P_1$ transition, we demonstrate Mach-Zehnder interferometers with state-of-the-art momentum separation of up to $141\,\hbar k$ and gradiometers of up to $81\,\hbar k$. Moreover, we circumvent excited state decay limitations and extend the gradiometer duration to 50 times the excited state lifetime. Because of the broad velocity acceptance of the interferometry pulses, all experiments are performed with laser-cooled atoms at a temperature o…
National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University（南京大学固体微结构物理学院、先进微结构协同创新中心）
We propose a method for optical interferometry in telescope arrays assisted by quantum networks. In our approach, the quantum state of incoming photons along with an arrival time index is stored in a binary qubit code at each receiver. Nonlocal retrieval of the quantum state via entanglement-assisted parity checks at the expected photon arrival rate allows for direct extraction of the phase difference, effectively circumventing transmission losses between nodes. Compared to prior proposals, our scheme (based on efficient quantum data compression) offers an exponential decrease in required enta…
We derive upper bounds for Hilbert-Schmidt's quantum coherence of general states of a $d$-level quantum system, a qudit, in terms of its incoherent uncertainty, with the latter quantified using the linear and von Neumann's entropies of the corresponding closest incoherent state. Similar bounds are obtained for Wigner-Yanase's coherence. The reported inequalities are also given as coherence-populations trade-off relations. As an application example of these inequalities, we derive quantitative wave-particle duality relations for multi-slit interferometry. Our framework leads to the identificati…
Wave--particle transition and quantum Zeno effect in which-way experiments with a superconducting quantum processor
RIKEN Center for Quantum Computing (RQC)（理化学研究所量子计算中心）；Department of Physics, University of Michigan（密歇根大学物理系）；Department of Applied Physics, Graduate School of Engineering, The University of Tokyo（东京大学工学研究科应用物理系）
Quantitative phase gradient microscopy with spatially entangled photons
University of Ottawa（渥太华大学）；National Research Council of Canada（加拿大国家研究委员会）；Joint Centre for Extreme Photonics（极端光子学联合中心）；National Cheng Kung University（国立成功大学）；Center for Quantum Frontiers of Research and Technology, NCKU（国立成功大学量子前沿研究与技术中心）；Institute for Quantum Studies, Chapman University（查普曼大学量子研究所）
