Essential entanglement for atomic and molecular physics

MC Tichy, F Mintert, A Buchleitner - Journal of Physics B: Atomic …, 2011 - iopscience.iop.org
Entanglement is nowadays considered as a key quantity for the understanding of
correlations, transport properties and phase transitions in composite quantum systems, and …

Quantum enhanced multiple phase estimation

PC Humphreys, M Barbieri, A Datta, IA Walmsley - Physical review letters, 2013 - APS
We study the simultaneous estimation of multiple phases as a discretized model for the
imaging of a phase object. We identify quantum probe states that provide an enhancement …

Suppression law of quantum states in a 3D photonic fast Fourier transform chip

A Crespi, R Osellame, R Ramponi… - Nature …, 2016 - nature.com
The identification of phenomena able to pinpoint quantum interference is attracting large
interest. Indeed, a generalization of the Hong–Ou–Mandel effect valid for any number of …

Conference key agreement with single-photon interference

F Grasselli, H Kampermann, D Bruß - New Journal of Physics, 2019 - iopscience.iop.org
The intense research activity on Twin-Field (TF) quantum key distribution (QKD) is motivated
by the fact that two users can establish a secret key by relying on single-photon interference …

Zero-transmission law for multiport beam splitters

MC Tichy, M Tiersch, F de Melo, F Mintert… - Physical review …, 2010 - APS
The Hong-Ou-Mandel effect is generalized to a configuration of n bosons prepared in the n
input ports of a Bell multiport beam splitter. We derive a strict suppression law for most …

Experimental access to higher-dimensional entangled quantum systems using integrated optics

C Schaeff, R Polster, M Huber, S Ramelow, A Zeilinger - Optica, 2015 - opg.optica.org
Integrated optics allows for the generation and control of increasingly complex photonic
states on chip-based architectures. Here, we implement two entangled qutrits—a nine …

Multiphoton interference in quantum fourier transform circuits and applications to quantum metrology

ZE Su, Y Li, PP Rohde, HL Huang, XL Wang, L Li… - Physical review …, 2017 - APS
Quantum Fourier transforms (QFTs) have gained increased attention with the rise of
quantum walks, boson sampling, and quantum metrology. Here, we present and …

Generalized Hong–Ou–Mandel experiments with bosons and fermions

YL Lim, A Beige - New Journal of Physics, 2005 - iopscience.iop.org
Abstract The Hong–Ou–Mandel (HOM) dip has played an important role in recent linear
optics experiments. It is crucial for quantum computing with photons and can be used to …

High error-rate quantum key distribution for long-distance communication

MM Khan, M Murphy, A Beige - New Journal of Physics, 2009 - iopscience.iop.org
In the original BB84 protocol by Bennett and Brassard, an eavesdropper is detected
because his attempts to intercept information result in a quantum bit error rate (QBER) of at …

Elementary optical gate for expanding an entanglement web

T Tashima, ŞK Özdemir, T Yamamoto, M Koashi… - Physical Review A …, 2008 - APS
We introduce an elementary optical gate for expanding polarization entangled W states in
which every pair of photons is entangled alike. The gate is composed of a pair of 50: 50 …