On the complexity of simulating space-bounded quantum computations

2003 ◽  
Vol 12 (1-2) ◽  
pp. 48-84 ◽  
Author(s):  
John Watrous
Keyword(s):  
Quantum Computations

scholarly journals Holographic quantum tasks with input and output regions

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Alex May
Keyword(s):  
Bulk Region ◽  
Link Type ◽  
Input And Output ◽  
Quantum Computations ◽  
Inputs And Outputs

Abstract Quantum tasks are quantum computations with inputs and outputs occurring at specified spacetime locations. Considering such tasks in the context of AdS/CFT has led to novel constraints relating bulk geometry and boundary entanglement. In this article we consider tasks where inputs and outputs are encoded into extended spacetime regions, rather than the points previously considered. We show that this leads to stronger constraints than have been derived in the point based setting. In particular we improve the connected wedge theorem, appearing earlier in arXiv:1912.05649, by finding a larger bulk region whose existence implies large boundary correlation. As well, we show how considering extended input and output regions leads to non-trivial statements in Poincaré-AdS2+1, a setting where the point-based connected wedge theorem is always trivial.

Demonstration of Unconditional One-Way Quantum Computations

2010 ◽  
Author(s):  
Ryuji Ukai ◽  
Noriaki Iwata ◽  
Yuji Shimokawa ◽  
Seiji Charles. Armstrong ◽  
Alberto Politi ◽  
...  
Keyword(s):  
Quantum Computations

Quantum memory and quantum computations in the optical subradiance regime

2005 ◽  
Vol 35 (8) ◽  
pp. 679-682 ◽  
Author(s):  
A A Kalachev ◽  
V V Samartsev
Keyword(s):  
Quantum Memory ◽  
Quantum Computations

scholarly journals Quantum computations with atoms in optical lattices: Marker qubits and molecular interactions

2004 ◽  
Vol 70 (1) ◽  
Author(s):  
T. Calarco ◽  
U. Dorner ◽  
P. S. Julienne ◽  
C. J. Williams ◽  
P. Zoller
Keyword(s):  
Molecular Interactions ◽  
Optical Lattices ◽  
Quantum Computations

Schemes of Quantum Computations with Trapped Ions

2005 ◽  
pp. 15-29
Author(s):  
J. F. Poyatos ◽  
J. I. Cirac ◽  
P. Zoller
Keyword(s):  
Trapped Ions ◽  
Quantum Computations

An electrostatic duel: subtle differences in catalytic performance of monoamine oxidase A and B isoenzymes elucidated at a residue level by quantum computations

2021 ◽  
Author(s):  
Alja Prah ◽  
Janez Mavri ◽  
Jernej Stare
Keyword(s):  
Monoamine Oxidase ◽  
Catalytic Performance ◽  
Residue Level ◽  
Monoamine Oxidase A ◽  
Quantum Computations ◽  
Catalytic Power

The origin of the immense catalytic power of enzymes remains one of the biggest unresolved questions in biochemistry, with electrostatics being one of the main contenders. Herein we report results...

EXAMPLES OF QUANTUM IT IN NEW TECHNOLOGIES OF COMPUTATION

2021 ◽  
Vol 158 (3-4) ◽  
pp. 65-89
Author(s):  
Tomasz Kuczerski
Keyword(s):  
Quantum Cryptography ◽  
New Technologies ◽  
Quantum Algorithms ◽  
Data Analyses ◽  
Matrix Calculus ◽  
Quantum Computations

The paper includes definitions of elements of quantum IT referred to classical technologies of computation. It explains the principles of transformation of calculating algorithms to the domain of quantum computations using the optimisation and matrix calculus. Exemplary applications of classical algorithms are presented with possibilities of their realisation in domain of quantum IT. Autor presents some possibilities for using quantum algorithms in new computation technologies concerning quantum cryptography and data analyses with complex computations.

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