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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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141 papers · 1 filter
Classical theories of gravity produce entanglement
Joseph Aziz, Richard Howl
The unification of gravity and quantum mechanics remains one of the most profound open questions in science. With recent advances in quantum technology, an experimental idea first…
Time crystal optomechanics
J. T. Mäkinen, P. J. Heikkinen, S. Autti +2
Time crystals are an enigmatic phase of matter in which a quantum mechanical system displays repetitive, observable motion - they spontaneously break the time translation symmetry.…
Benchmark of the Full and Reduced Effective Resistance Kernel for Molecular Classification
Adam Wesołowski, Karim Essafi
We present a comprehensive study of the commute time kernel method via the effective resistance framework analyzing the quantum complexity of the originally classical approach. Our…
High quality quasinormal modes of phononic crystals for quantum acoustodynamics
Aleksey N. Bolgar, Shtefan V. Sanduleanu, Aleksandr Strelnikov +1
Phononic crystals are a promising platform for the study of quantum acoustodynamics. In a recent experiment, the interaction of a superconducting quantum bit with modes of a phonon…
Evidencing Quantum Gravity with Thermodynamical Observables
Thomas Strasser, Marios Christodoulou, Richard Howl +1
Proposed experiments for obtaining empirical evidence for a quantum description of gravity in a table-top setting focus on detecting quantum information signatures, such as entangl…
Quantum subspace expansion approach for simulating dynamical response functions of Kitaev spin liquids
Chukwudubem Umeano, François Jamet, Lachlan P. Lindoy +2
We develop a quantum simulation-based approach for studying properties of strongly correlated magnetic materials at increasing scale. We consider a paradigmatic example of a quantu…
Dynamics and Resonance Fluorescence from a Superconducting Artificial Atom Doubly Driven by Quantized and Classical Fields
Xinhui Ruan, Jia-Heng Wang, Dong He +11
We report an experimental demonstration of resonance fluorescence in a two-level superconducting artificial atom under two driving fields coupled to a detuned cavity. One of the fi…
A phononic crystal coupled to a transmission line via an artificial atom
Aleksey N. Bolgar, Daniil D. Kirichenko, Rais. S. Shaikhaidarov +4
We study a phononic crystal interacting with an artificial atom { a superconducting quantum system { in the quantum regime. The phononic crystal is made of a long lattice of narrow…
Circuit locality from relativistic locality in scalar field mediated entanglement
Andrea Di Biagio, Richard Howl, Časlav Brukner +2
Locality is a central notion in modern physics, but different disciplines understand it in different ways. Quantum field theory focuses on relativistic locality, based on spacetime…
Quantum bath suppression in a superconducting circuit by immersion cooling
M. Lucas, A. V. Danilov, L. V. Levitin +7
Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Yet, multiple experiments to-date have shown that most properties of supercondu…
Breaking the Speed Limit for Perfect Quantum State Transfer
Weichen Xie, Alastair Kay, Christino Tamon
We describe a protocol for perfectly transferring a quantum state from one party to another under the dynamics of a fixed, engineered Hamiltonian. Our protocol combines the concept…
Incorporating Encoding into Quantum System Design
Alastair Kay
When creating a quantum system whose natural dynamics provide useful computational operations, designers have two key tools at their disposal: the (constrained) choice of both the…
Time dynamics of multi-photon scattering in a two-level mixer
A. V. Vasenin, A. Yu. Dmitriev, S. V. Kadyrmetov +2
A superconducting qubit in a waveguide behaves as a point-like nonlinear element. If irradiated with nearly resonant microwave pulses, the qubit undergoes quantum evolution and gen…
Variational quantum solutions to the Shortest Vector Problem
Martin R. Albrecht, Miloš Prokop, Yixin Shen +1
A fundamental computational problem is to find a shortest non-zero vector in Euclidean lattices, a problem known as the Shortest Vector Problem (SVP). This problem is believed to b…
Noise reducing encoding strategies for spin chains
Catherine Keele, Alastair Kay
We present an encoding technique that reduces the effects of noise on quantum spin systems whose operation is driven by Hamiltonian evolution. This technique is widely applicable,…
Combatting the Effects of Disorder in Quantum State Transfer
Catherine Keele, Alastair Kay
In this paper, we examine disorder (i.e. static imperfections in manufacture) for the fixed-Hamiltonian evolution protocol of quantum state transfer. We improve the performance by…
Effects of photon statistics in wave mixing on a single qubit
W. V. Pogosov, A. Yu. Dmitriev, O. V. Astafiev
We theoretically consider wave mixing under the irradiation of a single qubit by two photon fields. The first signal is a classical monochromatic drive, while the second one is a n…
Nonlinear two-level dynamics of quantum time crystals
Samuli Autti, Petri J Heikkinen, Jaakko Nissinen +4
A time crystal is a macroscopic quantum system in periodic motion in its ground state, stable only if isolated from energy exchange with the environment. For this reason, coupling…
Photon transport in a Bose-Hubbard chain of superconducting artificial atoms
G. P. Fedorov, S. V. Remizov, D. S. Shapiro +8
We demonstrate non-equilibrium steady-state photon transport through a chain of five coupled artificial atoms simulating the driven-dissipative Bose-Hubbard model. Using transmissi…
Quantum versus Classical Regime in Circuit Quantum Acoustodynamics
Gang-hui Zeng, Yang Zhang, Aleksey N. Bolgar +8
We experimentally study a circuit quantum acoustodynamics system, which consists of a superconducting artificial atom, coupled to both a two-dimensional surface acoustic wave reson…
Single-atom maser with engineered circuit for population inversion
A. A. Sokolova, G. P. Fedorov, E. V. Il'ichev +1
We present a blueprint for a maser with a single three-level transmon superconducting artificial atom. The system can be pumped coherently via a two-photon process, and to achieve…
Respecting One's Fellow: QBism's Analysis of Wigner's Friend
John B. DeBrota, Christopher A. Fuchs, Ruediger Schack
According to QBism, quantum states, unitary evolutions, and measurement operators are all understood as personal judgments of the agent using the formalism. Meanwhile, quantum meas…
On the CSL Scalar Field Relativistic Collapse Model
Daniel Bedingham, Philip Pearle
The CSL dynamical collapse structure, adapted to the relativistically invariant model where the collapse-generating operator is a one-dimensional scalar field (mass $m…
Two-level system as a quantum sensor of absolute power
T. Hönigl-Decrinis, R. Shaikhaidarov, S. E. de Graaf +2
A two-level quantum system can absorb or emit not more than one photon at a time. Using this fundamental property, we demonstrate how a superconducting quantum system strongly coup…