Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Pereira, Jason L."'
We study the identification of quantum phases of matter, at zero temperature, when only part of the phase diagram is known in advance. Following a supervised learning approach, we show how to use our previous knowledge to construct an observable capa
Externí odkaz:
http://arxiv.org/abs/2409.05188
Port-based teleportation is generalization of the standard teleportation protocol which does not require unitary operations by the receiver. This comes at the price of requiring $N>1$ entangled pairs, while $N=1$ for the standard teleportation protoc
Externí odkaz:
http://arxiv.org/abs/2302.08522
Publikováno v:
Phys. Rev. Applied 19, 054031 (2023)
Identifying clusters in data is an important task in many fields. In this paper, we consider situations in which data live in a physical world, so we have to first collect the images using sensors before clustering them. Using sensors enhanced by qua
Externí odkaz:
http://arxiv.org/abs/2208.05522
Publikováno v:
Phys. Rev. Applied 19, 054030 (2023)
Two types of errors can occur when discriminating pairs of quantum states. Asymmetric state discrimination involves minimizing the probability of one type of error, subject to a constraint on the other. We give explicit expressions bounding the set o
Externí odkaz:
http://arxiv.org/abs/2207.10699
Publikováno v:
Proc. R. Soc. A. 477, 20210513 (2021)
An important theorem in Gaussian quantum information tells us that we can diagonalise the covariance matrix of any Gaussian state via a symplectic transformation. Whilst the diagonal form is easy to find, the process for finding the diagonalising sym
Externí odkaz:
http://arxiv.org/abs/2108.05364
Publikováno v:
Phys. Rev. Lett. 127, 150501 (2021)
Protocols for discriminating between a pair of channels or for estimating a channel parameter can often be aided by adaptivity or by entanglement between the probe states. This can make it difficult to bound the best possible performance for such pro
Externí odkaz:
http://arxiv.org/abs/2104.11292
Publikováno v:
Phys. Rev. A 103, 042614 (2021)
Entanglement is a powerful tool for quantum sensing, and entangled states can greatly boost the discriminative power of protocols for quantum illumination, quantum metrology, or quantum reading. However, entangled state protocols generally require th
Externí odkaz:
http://arxiv.org/abs/2010.10547
Publikováno v:
Phys. Rev. Research 2, 043189 (2020)
Quantum channels model many physical processes. For this reason, hypothesis testing between quantum channels is a fundamental task in quantum information theory. Here we consider the paradigmatic case of channel position finding, where the aim is to
Externí odkaz:
http://arxiv.org/abs/2009.10094
Autor:
Pereira, Jason L., Pirandola, Stefano
Publikováno v:
Phys. Rev. A 103, 022610 (2021)
Amplitude damping (AD) channels are good models for many physical scenarios, and so the development of protocols to discriminate between them is an important task in quantum information science. It is therefore important to bound the performance of s
Externí odkaz:
http://arxiv.org/abs/2009.04783
Publikováno v:
npj Quantum Information 5, 50 (2019)
What is the ultimate performance for discriminating two arbitrary quantum channels acting on a finite-dimensional Hilbert space? Here we address this basic question by deriving a general and fundamental lower bound. More precisely, we investigate the
Externí odkaz:
http://arxiv.org/abs/1803.02834