scholarly journals Quantum simulations of a qubit of space

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
Grzegorz Czelusta ◽  
Jakub Mielczarek
Keyword(s):  
Quantum Simulations

Quantum Polaritonic

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Phase Transitions ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Quantum Phase Transitions ◽  
Macroscopic Quantum ◽  
Quantum Simulations ◽  
Macroscopic Quantum Phenomena ◽  
Microcavity Polaritons ◽  
Quantum Phenomena ◽  
The One

Microcavity polaritons have demonstrated their unique propensity to host macroscopic quantum phenomena. While they appear to be highly promising for applications in a classical realm, they are still far from competing even with decade old electronics. Another playground where polaritons could emerge as strong contenders is the microscopic quantum regime with single-particle effects and nonlinearities at the one-polariton level. Several theoretical proposals exist to explore polariton blockade mechanisms, realize sophisticated quantum phase transitions, implement quantum simulations and/or quantum information processing, thereby opening a new page of the polariton physics when such ideas will be implemented in the laboratory.

scholarly journals Applications of quantum computing for investigations of electronic transitions in phenylsulfonyl-carbazole TADF emitters

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Qi Gao ◽  
Gavin O. Jones ◽  
Mario Motta ◽  
Michihiko Sugawara ◽  
Hiroshi C. Watanabe ◽  
...  
Keyword(s):  
Excited States ◽  
Excellent Agreement ◽  
Light Emitting Diode ◽  
Delayed Fluorescence ◽  
Basis Sets ◽  
Quantum Equation ◽  
Quantum Simulations ◽  
Quantum Simulators ◽  
Error Mitigation ◽  
Correct Energy

AbstractA quantum chemistry study of the first singlet (S1) and triplet (T1) excited states of phenylsulfonyl-carbazole compounds, proposed as useful thermally activated delayed fluorescence (TADF) emitters for organic light emitting diode (OLED) applications, was performed with the quantum Equation-Of-Motion Variational Quantum Eigensolver (qEOM-VQE) and Variational Quantum Deflation (VQD) algorithms on quantum simulators and devices. These quantum simulations were performed with double zeta quality basis sets on an active space comprising the highest occupied and lowest unoccupied molecular orbitals (HOMO, LUMO) of the TADF molecules. The differences in energy separations between S1 and T1 (ΔEST) predicted by calculations on quantum simulators were found to be in excellent agreement with experimental data. Differences of 17 and 88 mHa with respect to exact energies were found for excited states by using the qEOM-VQE and VQD algorithms, respectively, to perform simulations on quantum devices without error mitigation. By utilizing state tomography to purify the quantum states and correct energy values, the large errors found for unmitigated results could be improved to differences of, at most, 4 mHa with respect to exact values. Consequently, excellent agreement could be found between values of ΔEST predicted by quantum simulations and those found in experiments.

scholarly journals Towards analog quantum simulations of lattice gauge theories with trapped ions

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Zohreh Davoudi ◽  
Mohammad Hafezi ◽  
Christopher Monroe ◽  
Guido Pagano ◽  
Alireza Seif ◽  
...  
Keyword(s):  
Gauge Theories ◽  
Trapped Ions ◽  
Quantum Simulations ◽  
Lattice Gauge ◽  
Lattice Gauge Theories

scholarly journals The phase diagram of water from quantum simulations

2012 ◽  
Vol 14 (29) ◽  
pp. 10140 ◽  
Author(s):  
Carl McBride ◽  
Eva G. Noya ◽  
Juan L. Aragones ◽  
Maria M. Conde ◽  
Carlos Vega
Keyword(s):  
Phase Diagram ◽  
Quantum Simulations

scholarly journals Quantum Simulations of the Superfluid-Insulator Transition for Two-Dimensional, Disordered, Hard-Core Bosons

1995 ◽  
Vol 74 (9) ◽  
pp. 1500-1503 ◽  
Author(s):  
Shiwei Zhang ◽  
N. Kawashima ◽  
J. Carlson ◽  
J. E. Gubernatis
Keyword(s):  
Hard Core ◽  
Insulator Transition ◽  
Two Dimensional ◽  
Quantum Simulations

scholarly journals Phase transitions in Zn gauge models: Towards quantum simulations of the Schwinger-Weyl QED

2018 ◽  
Vol 98 (7) ◽  
Author(s):  
Elisa Ercolessi ◽  
Paolo Facchi ◽  
Giuseppe Magnifico ◽  
Saverio Pascazio ◽  
Francesco V. Pepe
Keyword(s):  
Phase Transitions ◽  
Gauge Models ◽  
Quantum Simulations

scholarly journals Toward fully quantum modelling of ultrafast photodissociation imaging experiments. Treating tunnelling in the ab initio multiple cloning approach

2016 ◽  
Vol 194 ◽  
pp. 81-94 ◽  
Author(s):  
Dmitry V. Makhov ◽  
Todd J. Martinez ◽  
Dmitrii V. Shalashilin
Keyword(s):  
Kinetic Energy ◽  
Ab Initio ◽  
Energy Release ◽  
Kinetic Energy Release ◽  
Total Kinetic Energy ◽  
Recent Effort ◽  
Experimental Measurements ◽  
Quantum Level ◽  
Hydrogen Atoms ◽  
Quantum Simulations

We present an account of our recent effort to improve simulation of the photodissociation of small heteroaromatic molecules using the Ab Initio Multiple Cloning (AIMC) algorithm. The ultimate goal is to create a quantitative and converged technique for fully quantum simulations which treats both electrons and nuclei on a fully quantum level. We calculate and analyse the total kinetic energy release (TKER) spectra and Velocity Map Images (VMI), and compare the results directly with experimental measurements. In this work, we perform new extensive calculations using an improved AIMC algorithm that now takes into account the tunnelling of hydrogen atoms. This can play an extremely important role in photodissociation dynamics.

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