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 +3 more sources
High-efficiency quantum-nondemolition single-photon-number-resolving detector [PDF]
Physical Review A, 2005 4 pages, 4 figures. Significantly revised.
Munro, W. J. +3 more
openaire +4 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 ...
Yanbei Chen
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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
Quantum nondemolition measurements of a flux qubit coupled to a noisy detector [PDF]
Chinese Physics B, 2011 6 pages, 3 ...
Jiang, Wei, Yu, Yang, Wei, Lianfu
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Quantum Nondemolition Squeezing of a Nanomechanical Resonator [PDF]
, 2004 We show that the nanoresonator position can be squeezed significantly below the ground state level by measuring the nanoresonator with a quantum point contact or a single-electron transistor and applying a periodic voltage across the detector.
Korotkov, Alexander N. +2 more
core +2 more sources
Arbitrarily Large Continuous-Variable Cluster States from a Single Quantum Nondemolition Gate [PDF]
, 2010 We present a compact experimental design for producing an arbitrarily large optical continuous-variable cluster state using just one single-mode vacuum squeezer and one quantum nondemolition gate. Generating the cluster state and computing with it happen
H.-A. Bachor +3 more
core +2 more sources
Nonclassical correlations of photon number and field components in the vacuum state [PDF]
, 2000 It is shown that the quantum jumps in the photon number n from zero to one or more photons induced by backaction evasion quantum nondemolition measurements of a quadrature component x of the vacuum light field state are strongly correlated with the ...
A. Einstein +17 more
core +2 more sources