Zobrazeno 1 - 10
of 578
pro vyhledávání: '"Lam, Ping"'
Autor:
Shajilal, Biveen, Conlon, Lorcán O., Walsh, Angus, Tserkis, Spyros, Zhao, Jie, Janousek, Jiri, Assad, Syed, Lam, Ping Koy
Gaussian channel simulation is an essential paradigm in understanding the evolution of bosonic quantum states. It allows us to investigate how such states are influenced by the environment and how they transmit quantum information. This makes it an e
Externí odkaz:
http://arxiv.org/abs/2408.08667
Autor:
Conlon, Lorcan, Koh, Jin Ming, Shajilal, Biveen, Sidhu, Jasminder, Lam, Ping Koy, Assad, Syed M.
One of the fundamental tenets of quantum mechanics is that non-orthogonal states cannot be distinguished perfectly. When distinguishing multiple copies of a mixed quantum state, a collective measurement, which generates entanglement between the diffe
Externí odkaz:
http://arxiv.org/abs/2408.06678
Publikováno v:
Physical Review Research 6, 033315 (2024)
Measurement estimation bounds for local quantum multiparameter estimation, which provide lower bounds on possible measurement uncertainties, have so far been formulated in two ways: by extending the classical Cram\'er--Rao bound (e.g., the quantum Cr
Externí odkaz:
http://arxiv.org/abs/2407.12466
Addition of photons to coherent states is shown to produce effects that display remarkable similarities with cubic phase shifts acting on the vacuum state, with recorded fidelities in excess of 90 percent. The strength of the cubic interaction is fou
Externí odkaz:
http://arxiv.org/abs/2407.12265
In multi-parameter quantum metrology, the resource of entanglement can lead to an increase in efficiency of the estimation process. Entanglement can be used in the state preparation stage, or the measurement stage, or both, to harness this advantage;
Externí odkaz:
http://arxiv.org/abs/2405.09622
The symmetric logarithmic derivative Cram\'er-Rao bound (SLDCRB) provides a fundamental limit to the minimum variance with which a set of unknown parameters can be estimated in an unbiased manner. It is known that the SLDCRB can be saturated provided
Externí odkaz:
http://arxiv.org/abs/2404.01520
Publikováno v:
PRX Quantum 5, 030303 (2024)
The ability of quantum states to be in superposition is one of the key features that sets them apart from the classical world. This `coherence' is rigorously quantified by resource theories, which aim to understand how such properties may be exploite
Externí odkaz:
http://arxiv.org/abs/2401.16020
Radiation pressure can be used to enable optomechanical control and manipulation of the quantum state of a mechanical oscillator. Optomechanical interaction can also be mediated by photothermal effects which, although frequently overlooked, may compe
Externí odkaz:
http://arxiv.org/abs/2312.13375
Autor:
Sun, Xueqian, Suriyage, Manuka, Khan, Ahmed, Gao, Mingyuan, Zhao, Jie, Liu, Boqing, Hasan, Mehedi, Rahman, Sharidya, Chen, Ruosi, Lam, Ping Koy, Lu, Yuerui
Twisted vdW quantum materials have emerged as a rapidly developing field of 2D semiconductors. These materials establish a new central research area and provide a promising platform for studying quantum phenomena and investigating the engineering of
Externí odkaz:
http://arxiv.org/abs/2312.11757
Verifying the security of a continuous variable quantum communication protocol via quantum metrology
Autor:
Conlon, Lorcan O., Shajilal, Biveen, Walsh, Angus, Zhao, Jie, Janousek, Jiri, Lam, Ping Koy, Assad, Syed M.
Publikováno v:
npj Quantum Inf 10, 35 (2024)
Quantum mechanics offers the possibility of unconditionally secure communication between multiple remote parties. Security proofs for such protocols typically rely on bounding the capacity of the quantum channel in use. In a similar manner, Cram\'er-
Externí odkaz:
http://arxiv.org/abs/2311.05389