Quantum nondemolition measurements of a flux qubit coupled to a noisy detector [PDF]
Chinese Physics B, 2011 6 pages, 3 ...
L F Wei, Wei Lian-Fu
exaly +3 more sources
High-efficiency quantum-nondemolition single-photon-number-resolving detector [PDF]
Physical Review A, 2005 4 pages, 4 figures. Significantly revised.
William J Munro +2 more
exaly +3 more sources
Single-Shot Quantum Nondemolition Detection of Individual Itinerant Microwave Photons
Physical Review X, 2018 Single-photon detection is an essential component in many experiments in quantum optics, but it remains challenging in the microwave domain. We realize a quantum nondemolition detector for propagating microwave photons and characterize its performance ...
Jean-Claude Besse +7 more
doaj +2 more sources
Sagnac interferometer as a speed-meter-type, quantum-nondemolition gravitational-wave detector [PDF]
Physical Review D, 2003 According to quantum measurement theory, "speed meters" -- devices that measure the momentum, or speed, of free test masses -- are immune to the standard quantum limit (SQL). It is shown that a Sagnac-interferometer gravitational-wave detector is a speed meter and therefore in principle it can beat the SQL by large amounts over a wide band of ...
exaly +3 more sources
Multipartite entanglement purification with quantum nondemolition detectors [PDF]
The European Physical Journal D, 2009 We present a scheme for multipartite entanglement purification of quantum systems in a Greenberger-Horne-Zeilinger state with quantum nondemolition detectors (QNDs). This scheme does not require the controlled-not gates which cannot be implemented perfectly with linear optical elements at present, but QNDs based on cross-Kerr nonlinearities.
Sheng, Yu-Bo +4 more
openaire +2 more sources
Using nanokelvin quantum thermometry to detect timelike Unruh effect in a Bose–Einstein condensate
European Physical Journal C: Particles and Fields, 2023 It is found that the Unruh effect can not only arise out of the entanglement between two sets of modes spanning the left and right Rindler wedges, but also between modes spanning the future and past light cones.
Zehua Tian, Jiliang Jing
doaj +1 more source
Single-photon quantum-nondemolition detectors constructed with linear optics and projective measurements [PDF]
Physical Review A, 2002 Optical quantum nondemolition devices can provide essential tools for quantum information processing. Here, we describe several optical interferometers that signal the presence of a single photon in a particular input state without destroying it.
Kok, Pieter +2 more
openaire +2 more sources
Implementing and Characterizing Precise Multiqubit Measurements
Physical Review X, 2016 There are two general requirements to harness the computational power of quantum mechanics: the ability to manipulate the evolution of an isolated system and the ability to faithfully extract information from it.
J. Z. Blumoff +14 more
doaj +1 more source
Probabilistically cloning two single-photon states using weak cross-Kerr nonlinearities
New Journal of Physics, 2014 By using quantum nondemolition detectors (QNDs) based on weak cross-Kerr nonlinearities, we propose an experimental scheme for achieving $1\to 2$ probabilistic quantum cloning (PQC) of a single-photon state, secretly choosing from a two-state set. In our
Wen Zhang +3 more
doaj +1 more source
Enhanced Sensing Mechanism Based on Shifting an Exceptional Point. [PDF]
Research (Wash D C), 2023 Mao X +6 more
europepmc +1 more source