Results 41 to 50 of about 60,354 (258)

Guaranteed recovery of quantum processes from few measurements [PDF]

Quantum, 2019
Quantum process tomography is the task of reconstructing unknown quantum channels from measured data. In this work, we introduce compressed sensing-based methods that facilitate the reconstruction of quantum channels of low Kraus rank.
Martin Kliesch, Richard Kueng, Jens Eisert, David Gross   +3 more
doaj   +1 more source

Selective and efficient quantum state tomography and its application to quantum process tomography [PDF]

Physical Review A, 2013
5 pages, 4 ...
Bendersky, Ariel Martin, Paz, Juan Pablo
openaire   +3 more sources

Operational approach to open dynamics and quantifying initial correlations [PDF]

, 2012
A central aim of physics is to describe the dynamics of physical systems. Schrodinger's equation does this for isolated quantum systems. Describing the time evolution of a quantum system that interacts with its environment, in its most general form, has ...
A Kossakowski, A Pomyalov, A Rivas, A Shaji, A Smirne, A-M Kuah, AM Childs, ARU Devi, C Meiera, CA Rodríguez-Rosario, DZ Rossatto, E Geva, E-M Laine, ECG Sudarshan, G Engel, G Lindblad, H Carteret, H-P Breuer, IL Chuang, J Emerson, J Yuen-Zhou, J Yuen-Zhou, JF Poyatos, JL O'Brien, JM Chow, K Modi, K Modi, M Howard, M Neeley, MA Nielsen, MM Wolf, MW Mitchell, SH Myrskog, V Gorini, YS Weinstein   +34 more
core   +2 more sources

Role of preparation in quantum process tomography [PDF]

Physical Review A, 2010
11 pages, 4 ...
Modi, K., Sudarshan, E.C.G.
openaire   +2 more sources

A de Finetti Representation Theorem for Quantum Process Tomography

, 2003
In quantum process tomography, it is possible to express the experimenter's prior information as a sequence of quantum operations, i.e., trace-preserving completely positive maps.
Christopher A. Fuchs, E. Regazzini, G. G. Emch, M. A. Nielsen, Petra F. Scudo, R. L. Hudson, Rüdiger Schack   +6 more
core   +1 more source

Complete Characterization of Quantum-Optical Processes [PDF]

, 2008
The technologies of quantum information and quantum control are rapidly improving, but full exploitation of their capabilities requires complete characterization and assessment of processes that occur within quantum devices.
A. I. Lvovsky, Altepeter, Appel, B. C. Sanders, C. Kupchak, D'Ariano, D. Korystov, E. Figueroa, M. Lobino, Mitchell, O'Brien, Rehn, Riebe, Ye   +13 more
core   +2 more sources

Performing SU(d) Operations and Rudimentary Algorithms in a Superconducting Transmon Qudit for d=3 and d=4

Physical Review X, 2023
Quantum-computation architecture based on d-level systems, or qudits, has attracted considerable attention recently due to their enlarged Hilbert space. Extensive theoretical and experimental studies have addressed aspects of algorithms and benchmarking ...
Pei Liu, Ruixia Wang, Jing-Ning Zhang, Yingshan Zhang, Xiaoxia Cai, Huikai Xu, Zhiyuan Li, Jiaxiu Han, Xuegang Li, Guangming Xue, Weiyang Liu, Li You, Yirong Jin, Haifeng Yu   +13 more
doaj   +1 more source

Mitigation of readout noise in near-term quantum devices by classical post-processing based on detector tomography [PDF]

Quantum, 2020
We propose a simple scheme to reduce readout errors in experiments on quantum systems with finite number of measurement outcomes. Our method relies on performing classical post-processing which is preceded by Quantum Detector Tomography, i.e., the ...
Filip B. Maciejewski, Zoltán Zimborás, Michał Oszmaniec   +2 more
doaj   +1 more source

Multi-time quantum process tomography on a superconducting qubit [PDF]

Quantum
Current quantum technologies are at the cusp of becoming useful, but still face formidable obstacles such as noise. Noise severely limits the ability to scale quantum devices to the point that they would offer an advantage over classical devices.
Christina Giarmatzi, Tyler Jones, Alexei Gilchrist, Prasanna Pakkiam, Arkady Fedorov, Fabio Costa   +5 more
doaj   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source