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Precision-Guaranteed Quantum Metrology [PDF]
Physical Review A, 2015 Quantum metrology is a general term for methods to precisely estimate the value of an unknown parameter by actively using quantum resources. In particular, some classes of entangled states can be used to significantly suppress the estimation error. Here,
Sugiyama, Takanori
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'Designer atoms' for quantum metrology [PDF]
Nature, 2007 Entanglement is recognized as a key resource for quantum computation and quantum cryptography. For quantum metrology, the use of entangled states has been discussed and demonstrated as a means of improving the signal-to-noise ratio.
A Widera +29 more
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Unconditional violation of the shot noise limit in photonic quantum metrology
Nature Photonics, 2017 Interferometric phase measurement is widely used to precisely determine quantities such as length, speed, and material properties. Without quantum correlations, the best phase sensitivity $\Delta\varphi$ achievable using $n$ photons is the shot noise ...
Chrzanowski, Helen M. +6 more
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npj Quantum InformationWe demonstrate that the contextuality of measurement selection can enhance the precision of quantum metrology with a simple linear optical experiment. Contextuality is a nonclassical property known as a resource for various quantum information processing
Jeongwoo Jae +4 more
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Memory effects in quantum metrology [PDF]
Physical Review Letters, 2019 Quantum metrology concerns estimating a parameter from multiple identical uses of a quantum channel. We extend quantum metrology beyond this standard setting and consider estimation of a physical process with quantum memory, here referred to as a ...
Yang, Yuxiang
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Quantum measurement encoding for quantum metrology
Physical Review ResearchPreserving the precision of the parameter of interest in the presence of environmental decoherence is an important yet challenging task in dissipative quantum sensing. In this work, we study quantum metrology when the decoherence effect is unraveled by a
Jing Yang
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Photonic quantum metrology [PDF]
AVS Quantum Science, 2020 Quantum metrology is one of the most promising applications of quantum technologies. The aim of this research field is the estimation of unknown parameters exploiting quantum resources, whose application can lead to enhanced performances with respect to classical strategies.
Emanuele Polino +3 more
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Speed limit of quantum metrology. [PDF]
Sci Rep, 2023 AbstractQuantum metrology employs nonclassical systems to improve the sensitivity of measurements. The ultimate limit of this sensitivity is dictated by the quantum Cramér–Rao bound. On the other hand, the quantum speed limit bounds the speed of dynamics of any quantum process.
Maleki Y, Ahansaz B, Maleki A.
europepmc +4 more sources
Quantum Critical Metrology [PDF]
Physical Review Letters, 2018 Quantum metrology fundamentally relies upon the efficient management of quantum uncertainties. We show that under equilibrium conditions the management of quantum noise becomes extremely flexible around the quantum critical point of a quantum many-body system: this is due to the critical divergence of quantum fluctuations of the order parameter, which,
Frérot, Irénée, Roscilde, Tommaso
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