Publications (22)
Terrestrial Very-Long-Baseline Atom Interferometry: Summary of the Second Workshop
Adam Abdalla, Mahiro Abe, Sven Abend +307
This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024, build…
Entanglement and nonlocality of a single relativistic particle
Jacob Dunningham, Vlatko Vedral
Recent work has argued that the concepts of entanglement and nonlocality must be taken seriously even in systems consisting of only a single particle. These treatments, however, ar…
AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space
Yousef Abou El-Neaj, Cristiano Alpigiani, Sana Amairi-Pyka +129
We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range bet…
Making the most of time in quantum metrology: concurrent state preparation and sensing
Anthony J. Hayes, Shane Dooley, William J. Munro +2
A quantum metrology protocol for parameter estimation is typically comprised of three stages: probe state preparation, sensing and then readout, where the time required for the fir…
Cold Atoms in Space: Community Workshop Summary and Proposed Road-Map
Ivan Alonso, Cristiano Alpigiani, Brett Altschul +246
We summarize the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportu…
The role of entanglement in calibrating optical quantum gyroscopes
Pieter Kok, Jacob Dunningham, Jason F. Ralph
We consider the calibration of an optical quantum gyroscope by modeling two Sagnac interferometers, mounted approximately at right angles to each other. Reliable operation requires…
Generation of maximally entangled states with sub-luminal Lorentz boost
Veiko Palge, Jacob Dunningham
Recent work has studied entanglement between the spin and momentum components of a single spin-1/2 particle and showed that maximal entanglement is obtained only when boosts approa…
Quantum metrology in the presence of limited data
Jesús Rubio, Jacob Dunningham
Quantum metrology protocols are typically designed around the assumption that we have an abundance of measurement data, but recent practical applications are increasingly driving i…
Macroscopic superpositions of superfluid flows
David W. Hallwood, Jacob Dunningham, Keith Burnett
We present a scheme for creating macroscopic superpositions of the direction of superfluid flow around a loop. Using the Bose-Hubbard model we study an array of Bose-Einstein conde…
SEPnet: A sustainable model for a collaborative physics network
Jacob Dunningham, Olivia Keenan, Cristobel Soares +3
The South East Physics network (SEPnet) is a collaboration between nine universities in the South East of England, working together to deliver excellence in physics. By sharing res…
Bayesian multi-parameter quantum metrology with limited data
Jesús Rubio, Jacob Dunningham
A longstanding problem in quantum metrology is how to extract as much information as possible in realistic scenarios with not only multiple unknown parameters, but also limited mea…
Transformation properties and entanglement of relativistic qubits under space-time and gauge transformations
Xavier Calmet, Jacob Dunningham
We revisit the properties of qubits under Lorentz transformations and, by considering Lorentz invariant quantum states in the Heisenberg formulation, clarify some misleading notati…
Non-asymptotic analysis of quantum metrology protocols beyond the Cramér-Rao bound
Jesús Rubio, Paul Knott, Jacob Dunningham
Many results in the quantum metrology literature use the Cramér-Rao bound and the Fisher information to compare different quantum estimation strategies. However, there are several…
An investigation into why macroscopic systems behave classically
David W. Hallwood, Keith Burnett, Jacob Dunningham
We study why it is quite so hard to make a superposition of superfluid flows in a Bose-Einstein condensate. To do this we initially investigate the quantum states of atoms trap…
Proposal for an experiment to verify Wigner's rotation at non-relativistic speeds with massive spin- particles
Veiko Palge, Jacob Dunningham, Yuji Hasegawa +1
The Wigner rotation of quantum particles with spin is one of the fascinating consequences of interplay between special relativity and quantum mechanics. In this paper we show that…
Entanglement of two relativistic particles with discrete momenta
Veiko Palge, Jacob Dunningham
We study the structure of maps that Lorentz boosts induce on the spin degree of freedom of a system consisting of two massive spin- particles. We consider the case where the s…
Creation of macroscopic superpositions of flow states with Bose-Einstein condensates
Jacob Dunningham, David Hallwood
We present a straightforward scheme for creating macroscopic superpositions of different superfluid flow states of Bose-Einstein condensates trapped in optical lattices. This schem…
Terrestrial Very-Long-Baseline Atom Interferometry: Workshop Summary
Sven Abend, Baptiste Allard, Iván Alonso +250
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world…
From Rényi Entropy Power to Information Scan of Quantum States
Petr Jizba, Jacob Dunningham, Martin Prokš
In the estimation theory context, we generalize the notion of Shannon's entropy power to the Rényi-entropy setting. This not only allows to find new estimation inequalities, such…
Relativistic entanglement of two particles driven by continuous product momenta
Veiko Palge, Jacob Dunningham, Stefan Groote +1
In this paper we explore the entanglement of two relativistic spin- particles with continuous momenta. The spin state is described by the Bell state and the momenta are given…
Measuring atomic NOON-states and using them to make precision measurements
David W. Hallwood, Adam Stokes, Jessica J. Cooper +1
A scheme for creating NOON-states of the quasi-momentum of ultra-cold atoms has recently been proposed [New J. Phys. 8, 180 (2006)]. This was achieved by trapping the atoms in an o…
Nonlocality of a single particle
Jacob Dunningham, Vlatko Vedral
There has been a great deal of debate surrounding the issue of whether it is possible for a single photon to exhibit nonlocality. A number of schemes have been proposed that claim…