Results 71 to 80 of about 31,457 (170)

Quantum light detection in high-temperature superconducting nanowires

npj Nanophotonics
Detection of light quanta in superconducting nano- and microwires is the key enabling technology for fields ranging from quantum optics and quantum photonics to emerging applications like dark matter searches.
Mariia Sidorova, Alexej D. Semenov, Heinz-Wilhelm Hübers, Anton N. Vetlugin, Cesare Soci, Ilya Charaev, Andreas Schilling, Sergey Cherednichenko   +7 more
doaj   +1 more source

Observation of micro-macro entanglement of light

, 2013
Schroedinger's famous thought experiment involves a (macroscopic) cat whose quantum state becomes entangled with that of a (microscopic) decaying nucleus.
Chandra, A., Ghobadi, R., Lvovsky, A. I., Prasad, A. S., Simon, C.   +4 more
core   +1 more source

Scalable quantum detector tomography by high-performance computing

Quantum Science and Technology
Abstract At large scales, quantum systems may become advantageous over their classical counterparts at performing certain tasks. Developing tools to analyze these systems at the relevant scales, in a manner consistent with quantum mechanics, is therefore critical to benchmarking performance and characterizing their operation.
Timon Schapeler, Robert Schade, Michael Lass, Christian Plessl, Tim J Bartley   +4 more
openaire   +2 more sources

Momentum-resolved probing of Lorentz-violating dispersion relations via Unruh-DeWitt detector

Physics Letters B
Inspired by quantum gravity frameworks predicting Planck-scale deviations from Lorentz invariance, we probe Lorentz symmetry violation via modified dispersion relations ω|k|.
Hao Xu
doaj   +1 more source

Photon subtraction from traveling fields - recent experimental demonstrations

, 2011
We review our most recent results on application of the photon subtraction technique for optical quantum information processing primitives, in particular entanglement distillation and generation of squeezed qubit states.
Hayasaka, Kazuhiro, Neergaard-Nielsen, Jonas S., Sasaki, Masahide, Takahashi, Hiroki, Takeoka, Masahiro, Takeuchi, Makoto, Wakui, Kentaro   +6 more
core   +1 more source

Direct measurement of the Wigner function by photon-number-resolving detection

, 2014
Photon-number-revolving (PNR) detection allows the direct measurement of the Wigner quasiprobability distribution of an optical mode without the need for numerically processing an inverse Radon transform [K. Banaszek and K. W\'odkiewicz, Phys. Rev. Lett.
Calkins, Brice, Gerrits, Thomas, Lita, Adriana, Miller, Aaron J., Nam, Sae Woo, Pfister, Olivier, Shahrokhshahi, Reihaneh, Sridhar, Niranjan   +7 more
core   +1 more source

Experimental Polarization State Tomography using Optimal Polarimeters

, 2006
We report on the experimental implementation of a polarimeter based on a scheme known to be optimal for obtaining the polarization vector of ensembles of spin-1/2 quantum systems, and the alignment procedure for this polarimeter is discussed.
Alexander Ling, Antía Lamas-Linares, B.-G. Englert, Christian Kurtsiefer, E. L. O’Neill, K. Kraus, Kee Pang Soh, R. M. A. Azzam, R. Schack   +8 more
core   +1 more source

Optical Phase-Space-Time-Frequency Tomography

, 2011
We present a new approach for constructing optical phase-space-time-frequency tomography (OPSTFT) of an optical wave field. This tomography can be measured by using a novel four-window optical imaging system based on two local oscillator fields balanced ...
Beck, Bertrand, Bollen, Boyer, Hillery, John, Kim Fook Lee, Kolobov, Kurtsiefer, Lee, Leibfried, Lvovsky, McAlister, Paul Rojas, Rachel Blaser, Raymer, Reil, Smith, Smithey, Toscano, Vogel, Wagner, Wigner, Wodkiewicz, Yong Meng Sua, Zurek   +25 more
core   +1 more source

Gradient-descent methods for quantum detector tomography

We present a technique for performing quantum detector tomography (QDT) of phase insensitive quantum detectors using gradient descent-based optimization to learn the positive operator-valued measure (POVM) that best describes the data collected using the detector under study.
Anteneh, Amanuel, Pfister, Olivier
openaire   +2 more sources

Broadband generation and tomography of non-Gaussian states for ultra-fast optical quantum processors

Nature Communications
Quantum information processors benefit from high clock frequencies to fully harness quantum advantages before they are lost to decoherence. All-optical systems offer unique benefits due to their inherent 100-THz carrier frequency, enabling the ...
Akito Kawasaki, Ryuhoh Ide, Hector Brunel, Takumi Suzuki, Rajveer Nehra, Katsuki Nakashima, Takahiro Kashiwazaki, Asuka Inoue, Takeshi Umeki, Fumihiro China, Masahiro Yabuno, Shigehito Miki, Hirotaka Terai, Taichi Yamashima, Atsushi Sakaguchi, Kan Takase, Mamoru Endo, Warit Asavanant, Akira Furusawa   +18 more
doaj   +1 more source