Results 101 to 110 of about 41,273 (213)

Digital Surface‐Enhanced Raman Scattering With Event Counting and Spectrum Learning for Label‐Free Protein Quantification

Advanced Intelligent Systems, EarlyView.
A statistical and machine learning‐assisted surface‐enhanced Raman scattering (SERS) framework is developed for label‐free quantification of low‐abundance analytes, including proteins. Combining digital SERS event counting with binomial regression and an artificial neural network (ANN) trained on full spectra, the approach achieves picomolar detection ...
Eni Kume, James Rice
wiley   +1 more source

Low contact resistance in epitaxial graphene devices for quantum metrology

AIP Advances, 2015
We investigate Ti/Au contacts to monolayer epitaxial graphene on SiC (0001) for applications in quantum resistance metrology. Using three-terminal measurements in the quantum Hall regime we observed variations in contact resistances ranging from a ...
Tom Yager, Arseniy Lartsev, Karin Cedergren, Rositsa Yakimova, Vishal Panchal, Olga Kazakova, Alexander Tzalenchuk, Kyung Ho Kim, Yung Woo Park, Samuel Lara-Avila, Sergey Kubatkin   +10 more
doaj   +1 more source

Interaction-based quantum metrology showing scaling beyond the Heisenberg limit

, 2010
Quantum metrology studies the use of entanglement and other quantum resources to improve precision measurement. An interferometer using N independent particles to measure a parameter X can achieve at best the "standard quantum limit" (SQL) of sensitivity
A Negretti, B. Dubost, BA Chase, D Budker, F Wolfgramm, H Lee, I Kominis, J Beltrán, K Hammerer, M Fleischhauer, M Koschorreck, M Koschorreck, M Kubasik, M Napolitano, M. Koschorreck, M. Napolitano, M. W. Mitchell, MJ Woolley, MO Scully, MW Mitchell, N. Behbood, R. J. Sewell, S Boixo, S Boixo, S Boixo, S Choi, SM Roy, V Giovannetti, VB Braginskii, W Wasilewski   +29 more
core   +1 more source

On the Optimal Choice of Spin-Squeezed States for Detecting and Characterizing a Quantum Process

, 2014
Quantum metrology uses quantum states with no classical counterpart to measure a physical quantity with extraordinary sensitivity or precision. Most metrology schemes measure a single parameter of a dynamical process by probing it with a specially ...
Blume-Kohout, Robin, Mahler, Dylan H., Rozema, Lee A., Steinberg, Aephraim M.   +3 more
core   +2 more sources

Experimental Demonstration of Radio‐Frequency Hong‐Ou‐Mandel Interference With Emulated Single‐Photon States

Advanced Physics Research, EarlyView.
We report an experimental demonstration of room‐temperature Hong–Ou–Mandel interference at a radio‐wave frequency of 120 MHz using emulated single‐photon states conditionally built from classical phase‐averaged coherent states. Our technique and results open the door to realizing quantum protocols in frequency ranges where standard quantum technologies
A. Sheleg, D. Vovchuk, K. Boiko, P. Ginzburg, G. Slepyan, A. Boag, A. Mikhalychev, A. Ulyanenkov, T. Salgals, D. Mogilevtsev   +9 more
wiley   +1 more source

Reference-frame-independent quantum metrology

Physical Review Research
How can we perform a metrological task if only limited control over a quantum system is given? Here, we present systematic methods for conducting nonlinear quantum metrology in scenarios lacking a common reference frame.
Satoya Imai, Otfried Gühne, Géza Tóth
doaj   +1 more source

Recent Advances in Stimulated Brillouin Scattering in Integrated Photonics

Advanced Physics Research, EarlyView.
This review systematically surveys recent advances in stimulated Brillouin scattering (SBS) within integrated photonics. It begins by elucidating the fundamental mechanisms of stimulated coupling between photons and acoustic phonons in nanoscale waveguides, enhanced by the photoelastic and moving boundary effects.
Songyue Liu, Qi Lu, Pan Hu, Yuan Zhong, Yu He, Yaojing Zhang, Young‐Ik Sohn, Yikai Su, Lu Sun   +8 more
wiley   +1 more source

Fractional Shapiro steps in a cavity-coupled Josephson ring condensate

Physical Review Research
The Josephson effect presents a fundamental example of macroscopic quantum coherence as well as a crucial enabler for metrology (e.g., voltage standard), sensing (e.g., superconducting quantum interference device), and quantum information processing ...
Nalinikanta Pradhan, Rina Kanamoto, M. Bhattacharya, Pankaj Kumar Mishra   +3 more
doaj   +1 more source

Noiseless Linear Amplification and Distillation of Entanglement

, 2009
The idea of signal amplification is ubiquitous in the control of physical systems, and the ultimate performance limit of amplifiers is set by quantum physics.
A Furusawa, A. P. Lund, AP Lund, B Hage, BL Higgins, CH Bennett, Ch Silberhorn, CM Caves, CW Chou, DE Browne, DT Pegg, F Grosshans, G. J. Pryde, G. Y. Xiang, H Takahashi, H-A Bachor, JP Dowling, K Mølmer, L-M Duan, N. Walk, R Dong, SA Babichev, SL Braunstein, T. C. Ralph, TC Ralph, TC Ralph, UL Andersen, WK Wootters, ZY Ou   +28 more
core   +1 more source

Advances in Position‐Momentum Entanglement: A Versatile Tool for Quantum Technologies

Laser &Photonics Reviews, EarlyView.
Position–momentum entanglement constitutes a high‐dimensional continuous‐variable resource in quantum optics. Recent advances in its generation, characterization, and control are reviewed, with emphasis on spontaneous parametric down‐conversion and modern measurement techniques.
Satyajeet Patil, Rajshree Swarnkar, Jonas L. Moos, Sebastian Töpfer, Sergio Tovar‐Pérez, Jorge Fuenzalida, Markus Gräfe   +6 more
wiley   +1 more source