360 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of JyväskyläFI215 papers
- University of OsloNO212 papers
- Heidelberg UniversityDE211 papers
- University of BergenNO211 papers
- Aligarh Muslim UniversityIN210 papers
- European Organization for Nuclear ResearchCH210 papers
- Oak Ridge National LaboratoryUS210 papers
- Panjab UniversityIN210 papers
- Yale UniversityUS210 papers
- Central China Normal UniversityCN209 papers
- Czech Academy of Sciences, Nuclear Physics InstituteCZ209 papers
- Czech Technical University in PragueCZ209 papers
17 papers · 1 filter
Witnesses of Genuine Multipartite Entanglement and Nonlocal Measurement Back-action for Raman-scattering Quantum Systems
Kai Ryen Bush, Kjetil Børkje
Entanglement between remote quantum mechanical systems enables a range of quantum information tasks in communication, computation and distributed sensing. Large numbers of entangle…
Gravity-mediated entanglement via infinite-dimensional systems
Stefan L. Ludescher, Leon D. Loveridge, Thomas D. Galley +1
There has been a wave of recent interest in detecting the quantum nature of gravity with table-top experiments that witness gravitationally mediated entanglement. Central to these…
Preparation of conditionally-squeezed states in qubit-oscillator systems
Marius K. Hope, Jonas Lidal, Francesco Massel
Inspired by recent advances in the manipulation of superconducting circuits coupled to mechanical modes in the quantum regime, we propose a protocol for generating superpositions o…
Uncertainty Relations Relative to Phase-Space Quantum Reference Frames
Miguel Jorquera Riera, Leon Loveridge
We study Heisenberg's uncertainty relation relative to a quantum reference frame (QRF). We introduce the QRF as a covariant phase-space observable, show that when described relativ…
Non-hermitian topology and entanglement in an optomechanical superlattice
Wojciech Brzezicki, Timo Hyart, Francesco Massel
The interplay between topology, dissipation and nonlinearities can give rise to a wealth of new phenomena and pave the way for novel topological lasers, sensors and other quantum d…
Hybrid optomechanical superconducting qubit system
Juuso Manninen, Robert H. Blick, Francesco Massel
We propose an integrated nonlinear superconducting device based on a nanoelectromechanical shuttle. The system can be described as a qubit coupled to a bosonic mode. The topology o…
Proposal for Observing Nonclassicality in Highly Excited Mechanical Oscillators by Single Photon Detection
Kai Ryen Bush, Kjetil Børkje
The preparation of pure quantum states with high degrees of macroscopicity is a central goal of ongoing experimental efforts to control quantum systems. We present a state preparat…
Operational Quantum Reference Frame Transformations
Titouan Carette, Jan Głowacki, Leon Loveridge
Quantum reference frames are needed in quantum theory for much the same reasons that reference frames are in classical theories: to manifest invariance in line with fundamental rel…
Quantum state purity versus average phonon number for characterization of mechanical oscillators in cavity optomechanics
K. Børkje, F. Marin
Quantum oscillators in Gaussian states are often characterized by average occupation numbers that refer to a basis of eigenstates of the non-interacting oscillator Hamiltonian. We…
Non-Hermitian topological quantum states in a reservoir-engineered transmon chain
Wojciech Brzezicki, Matti Silveri, Marcin Płodzień +2
Dissipation in open systems enriches the possible symmetries of the Hamiltonians beyond the Hermitian framework allowing the possibility of novel non-Hermitian topological phases,…
Incompatibility of effects in general probabilistic models
Roberto Beneduci, Leon Loveridge
We give a necessary and sufficient condition for the incompatibility of a pair of effects in a general probabilistic model in which the state space is a total convex space, which c…
Measurement disturbance and conservation laws in quantum mechanics
M. Hamed Mohammady, Takayuki Miyadera, Leon Loveridge
Measurement error and disturbance, in the presence of conservation laws, are analysed in general operational terms. We provide novel quantitative bounds demonstrating necessary con…
Nonclassical photon statistics in two-tone continuously driven optomechanics
K. Borkje, F. Massel, J. G. E. Harris
In cavity optomechanics, single photon detection of Raman scattered photons can be a useful tool for observing nonclassical features of both radiation and motion. While this tool h…
A quantum reference frame size-accuracy trade-off for quantum channels
Takayuki Miyadera, Leon Loveridge
The imposition of symmetry upon the nature and structure of quantum observables has recently been extensively studied, with quantum reference frames playing a crucial role. In this…
A relational perspective on the Wigner-Araki-Yanase theorem
Leon Loveridge
We present a novel interpretation of the Wigner-Araki-Yanase (WAY) theorem based on a relational view of quantum mechanics. Several models are analysed in detail, backed up by gene…
Critical quantum fluctuations and photon antibunching in optomechanical systems with large single-photon cooperativity
Kjetil Borkje
A pertinent question in cavity optomechanics is whether reaching the regime of large single-photon cooperativity, where the single-photon coupling rate exceeds the geometric mean o…
Relative Quantum Time
Leon Loveridge, Takayuki Miyadera
The need for a time-shift invariant formulation of quantum theory arises from fundamental symmetry principles as well as heuristic cosmological considerations. Such a description t…