Results 111 to 120 of about 386,203 (296)

Quantum state tomography as a numerical optimization problem

New Journal of Physics, 2021
We present a framework that formulates the quest for the most efficient quantum state tomography (QST) measurement set as an optimization problem which can be solved numerically, where the optimization goal is the maximization of the information gain ...
Violeta N Ivanova-Rohling, Guido Burkard, Niklas Rohling   +2 more
doaj   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Quantum tomography via equidistant states [PDF]

Physical Review A, 2010
We study the possibility of performing quantum state tomography via equidistant states. This class of states allows us to propose a non-symmetric informationally complete POVM based tomographic scheme. The scheme is defined for odd dimensions and involves an inversion which can be analytically carried out by Fourier transform.
Paiva-Sanchez, C., Burgos-Inostroza, E., Jimenez, O., Delgado, A.   +3 more
openaire   +4 more sources

Hyperentanglement-enabled Direct Characterization of Quantum Dynamics

, 2012
We use hyperentangled photons to experimentally implement an entanglement-assisted quantum process tomography technique known as Direct Characterization of Quantum Dynamics.
D. Nigg, J. T. Barreiro, M. Mohseni, M. A. Nielsen, P. G. Kwiat, T. M. Graham   +5 more
core   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

Tomographic Quantum Cryptography

, 2003
We present a protocol for quantum cryptography in which the data obtained for mismatched bases are used in full for the purpose of quantum state tomography.
A. Beige, A. Chefles, A.K. Ekert, A.S. Holevo, B.-G. Englert, C. Kurtsiefer, D. BruBruß, D. Deutsch, D. Kaszlikowski, D.S. Naik, E. Waks, H. Weyl, I. Csiszár, I.D. Ivanović, J. Schwinger, J.I. Cirac, L. Vaidman, M. Horodecki, N. Gisin, N. Gisin, N.J. Cerf, O. Schulz, P.K. Aravind, S.M. Barnett, T. Jennewein, U.M. Maurer, W. Tittel, W.K. Wootters, Y. Aharonov   +28 more
core   +1 more source

Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)

Advanced Functional Materials, EarlyView.
Luminescent MOF‐76 materials based on Eu(III) and mixed Eu(III)/Y(III) show rapid and reversible changes in emission intensity in response to O2 with very short response times. The effect is based on triplet quenching of the linker ligands that act as photosensitizers. Average emission lifetimes of a few milliseconds turn out to be mostly unaffected by
Zhenyu Zhao, Christian Weinberger, Jakob Steube, Matthias Bauer, Martin Brehm, Michael Tiemann   +5 more
wiley   +1 more source

Calibration and High Fidelity Measurement of a Quantum Photonic Chip

, 2013
Integrated quantum photonic circuits are becoming increasingly complex. Accurate calibration of device parameters and detailed characterization of the prepared quantum states are critically important for future progress.
Bitauld, D., Laing, A., Li, H. W., Niskanen, A. O., O'Brien, J. L., Politi, A., Shadbolt, P., Wabnig, J.   +7 more
core   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Self-calibration for self-consistent tomography

New Journal of Physics, 2012
Self-calibrating states are introduced as quantum resources for the simultaneous reconstruction of a quantum state and measurement device. Simple criteria for a state being self-calibrating are formulated.
D Mogilevtsev, J Řeháček, Z Hradil
doaj   +1 more source