Results 91 to 100 of about 9,805 (195)
Nonlocality Enhanced Precision in Quantum Polarimetry via Entangled Photons
Advanced Quantum Technologies, Volume 7, Issue 11, November 2024.A quantum polarimetry method using entangled photons to improve measurement precision is introduced. By calculating precision bounds and estimating the rotation angle of optical elements, both theoretically and experimentally, it is shown that the capability of entanglement to enhance accuracy is diminished with noise.
Ali Pedram +3 more
wiley +1 more source
Notes on general SIC-POVMs [PDF]
Physica Scripta, 2014 An unavoidable task in quantum information processing is how to obtain data about the state of an individual system by suitable measurements. Informationally complete measurements are relevant in quantum state tomography, quantum cryptography, quantum cloning, and other questions.
openaire +2 more sources
, 2006 We discuss the problem of implementing generalized measurements (POVMs) with linear optics, either based upon a static linear array or including conditional dynamics.
A. Chefles +9 more
core +1 more source
Advanced Quantum Technologies, Volume 7, Issue 11, November 2024.This work proposes the spatiotemporal doubled‐density operator as a unified framework for studying spatial and temporal quantum processes. All physical information is encoded in doubled‐density operators and a unified Born rule for both spatial and temporal quantum processes is provided.
Zhian Jia, Dagomir Kaszlikowski
wiley +1 more source
Locality and nonlocality in quantum pure-state identification problems
, 2008 Suppose we want to identify an input state with one of two unknown reference states, where the input state is guaranteed to be equal to one of the reference states.
A. Hayashi +6 more
core +1 more source
On the power of quantum entanglement in multipartite quantum XOR games
Journal of the London Mathematical Society, Volume 110, Issue 5, November 2024.Abstract We show that, given k⩾3$k\geqslant 3$, there exist k$k$‐player quantum XOR games for which the entangled bias can be arbitrarily larger than the bias of the game when the players are restricted to separable strategies. In particular, quantum entanglement can be a much more powerful resource than local operations and classical communication to ...
Marius Junge, Carlos Palazuelos
wiley +1 more source
Multi-state and multi-hypothesis discrimination with open quantum systems
, 2018 We show how an upper bound for the ability to discriminate any number N of candidates for the Hamiltonian governing the evolution of an open quantum system may be calculated by numerically efficient means.
Kiilerich, Alexander Holm +1 more
core +1 more source
IET Quantum Communication, Volume 5, Issue 2, Page 173-184, June 2024.We propose a novel JRSP protocol for transmitting general multi‐qudit states over quantum networks, providing a promising pathway to utilize the available Einstein‐Podolsky‐Rosen (EPR) channels with different levels. Firstly, we investigate the joint remote state preparation scheme with the same‐level EPR pairs.
Zongyi Li, Yuzhen Wei, Min Jiang
wiley +1 more source
Efficient universal programmable quantum measurements
, 2004 A universal programmable detector is a device that can be tuned to perform any desired measurement on a given quantum system, by changing the state of an ancilla.
A. S. Holevo +3 more
core +1 more source
Classical Invasive Description of Informationally‐Complete Quantum Processes
Annalen der Physik, Volume 536, Issue 4, April 2024.One often assumes that one can completely measure classical systems without altering them. In real scenarios, however, this may not always be possible: measuring the position of a small particle can randomly change its momentum and subsequent evolution.
Moritz F. Richter +3 more
wiley +1 more source