Quantum Science

The QuamNESS consortium unites researchers in University of Bristol, Queens University of Belfast and Trinity College Dublin under the support of a grant from the Engineering and Physical Sciences Research Council and Science Foundation Ireland (EPSRC-SFI) to explore the thermodynamics of quantum machines and technologies.... Read more
Published on: 2020-08-04
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Published on: 2020-08-03
These technologies include quantum-inspired molecular optimization, ... more elaborate quantum mechanics and molecular mechanics calculations to ...... Read more
Published on: 2020-08-03
... brilliant and represents an anthropological, biological, and even metaphysical insight unrivaled in science since relativity and quantum mechanics.... Read more
Published on: 2020-08-02
Australia urged to invest in quantum computing ahead of future pandemics “Michael Biercuk, who is a professor of quantum physics and quantum technology at the… Continue readingThings to read and watch about #QuantumComputing – 08/01/2020 The post Things to read and watch about #QuantumComputing – 08/01/2020 appeared first on Robert... Read more
Published on: 2020-08-01
... Zeyu Biotechnology, Yunnan Kang Wei biological, Jiangsu Liang Feng ... Jiangmen Quantum Hi-Tech Biological Corporation, Baolingbao Biology, ...... Read more
Published on: 2020-08-01
We obtain the quantized momentum eigenvalues, Pn, and the momentum eigenstates for the space-like Schrodinger equation, the Feinberg-Horodecki equation, with the improved deformed exponential-type potential which is constructed by temporal counterpart of the spatial form of these potentials. We also plot the variations of the improved deformed exponential-type potential with... Read more
Published on: 2020-07-31
This work investigates the suppression of individual harmonics, simultaneously affecting specific even and odd orders in the high-harmonic spectra generated by strongly tailored, two-colour, multi-cycle laser pulses in neon. The resulting spectra are systematically studied as a function of the electric-field shape in a symmetry-broken ($omega$-$2omega$) and symmetry-preserved ($omega$-$3omega$) configuration.... Read more
Published on: 2020-07-31
Interference between different photons occurs and has been observed under diverse experimental conditions. A necessary condition in order to obtain interference fringes is the existence of at least two possible paths and unknown which-path information. If the photon beams have different frequencies, stability of the sources and fast enough detectors... Read more
Published on: 2020-07-31
Fault-tolerant quantum information processing with flawed qubits and gates requires highly efficient, quantum non-demolition (QND) qubit readout. In superconducting circuits, qubit readout using coherent light with fidelity above 99% has been achieved by using quantum-limited parametric amplifiers such as the Josephson Parametric Converter (JPC). However, further improvement of such measurement... Read more
Published on: 2020-07-31
We study the resonance interaction between two entangled identical atoms coupled to a quantized scalar field vacuum, and accelerating between two mirrors. We show how radiative processes of the two-atom entangled state can be manipulated by the atomic configuration undergoing noninertial motion. Incorporating the Heisenberg picture with symmetric operator ordering,... Read more
Published on: 2020-07-31
Discrete-time quantum walks are known to exhibit exotic topological states and phases. Physical realization of quantum walks in a noisy environment may destroy these phases. We investigate the behavior of topological states in quantum walks in the presence of a lossy environment. The environmental effects in the quantum walk dynamics... Read more
Published on: 2020-07-31
Quantum Cellular Automata are unitary maps that preserve locality and respect causality. We identify them, in any dimension, with simple tensor networks (PEPU) whose bond dimension does not grow with the system size. As a result, they satisfy an area law for the entanglement entropy they can create. We define... Read more
Published on: 2020-07-31
We present a method relying on shortcuts to adiabaticity to achieve quantum detection of high frequency signals at the nanoscale in a robust manner. More specifically, our protocol delivers tailored amplitudes and frequencies for control fields that, firstly, enable the coupling of the sensor with high-frequency signals and, secondly, minimise... Read more
Published on: 2020-07-31
Could we hear the pop of a wave-function collapse, and if so, what would it sound like? There exist reconstructions or modifications of quantum mechanics (collapse models) where this archetypal signature of randomness exists and can in principle be witnessed. But, perhaps surprisingly, the resulting sound is disappointingly banal, indistinguishable... Read more
Published on: 2020-07-31
Following a generic approach that leads to Bogomolny-Prasad-Sommerfield (BPS) soliton solutions by imposing self-duality, we investigate three different types of non-Hermitian field theories. We consider a complex version of a logarithmic potential that possess BPS super-exponential kink and antikink solutions and two different types of complex generalisations of systems of... Read more
Published on: 2020-07-31
We present and characterize a source for a 5 GHz clocked polarization-based simplified BB84 protocol. Secret keys are distributed over 151.5 km of standard telecom fiber at a rate of 54.5 kbps. Potentially, an increased clock frequency of the experiment introduces correlations between succeeding pulses. We discuss the impact of... Read more
Published on: 2020-07-31
The application of Quantum Teleportation for control of classical dynamic systems and autonomy is proposed in this paper. Quantum teleportation is an intrinsically quantum phenomenon, and was first introduced by teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels in 1993. In this paper, we consider the possibility... Read more
Published on: 2020-07-31
Quantum computers promise significant speedups in solving problems intractable for conventional computers but, despite recent progress, remain limited in scaling and availability. Therefore, quantum software and hardware development heavily rely on simulation that runs on conventional computers. Most such approaches perform strong simulation in that they explicitly compute amplitudes of... Read more
Published on: 2020-07-31
Coherent conversion from microwave to optical wave opens new research avenues towards long distant quantum network covering quantum communication, computing, and sensing out of the laboratory. Especially multi-mode enabled system is essential for practical applications. Here we experimentally demonstrate coherent multi-mode conversion from the microwave to optical wave via collective... Read more
Published on: 2020-07-31