Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Conlon, Lorcan"'
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
Autor:
Ben-Aïcha, Yosri, Mehdi, Zain, Freier, Christian, Szigeti, Stuart S., Wigley, Paul B., Conlon, Lorcán O., Husband, Ryan, Legge, Samuel, Eagle, Rhys H., Hope, Joseph J., Robins, Nicholas P., Close, John D., Hardman, Kyle S., Haine, Simon A., Thomas, Ryan J.
We demonstrate an atom interferometer measurement protocol compatible with operation on a dynamic platform. Our method employs two open interferometers, derived from the same atomic source, with different interrogation times to eliminate initial velo
Externí odkaz:
http://arxiv.org/abs/2405.00400
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
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
Autor:
Conlon, Lorcan O., Walsh, Angus, Hua, Yuhan, Thearle, Oliver, Vogl, Tobias, Eilenberger, Falk, Lam, Ping Koy, Assad, Syed M.
Publikováno v:
New J. Phys. 26, 053003 (2024)
Quantum mechanics has withstood every experimental test thus far. However, it relies on ad-hoc postulates which require experimental verification. Over the past decade there has been a great deal of research testing these postulates, with numerous te
Externí odkaz:
http://arxiv.org/abs/2308.03446
Publikováno v:
Entropy 2023, 25(8), 1122
This work compares the performance of single and two qubit probes for estimating several phase rotations simultaneously under the action of different noisy channels. We compute the quantum limits for this simultaneous estimation using collective and
Externí odkaz:
http://arxiv.org/abs/2307.13936