Comparison the performance of five-qubit IBM quantum computers in terms of Bell states preparation

Experimenting quantum phenomena on NISQ computers using high level quantum programming

“…Our data are quite off compared to theoretical and simulation results. This is not a surprising result, as the IBM's NISQ computers are known for noises and mostly limit to shallow circuits [9,10,[16][17][18][19][20][21]. Finding the origin for these errors is outside the scope of this work, as it requires in-depth information from the chip design, fabrication process, microwave setup, cryostat, and their inter-connections.…”

“…Designed as a universal computing platform and programmed using high-level language through cloud access, there is a range of remarkable works performed on real devices with few qubits. They include the demonstration of important quantum algorithms [9,10], simulation of quantum phenomena [11][12][13][14][15][16], or reproducing foundation quantum experiences [17][18][19][20][21].…”

Experimenting quantum phenomena on NISQ computers using high level quantum programming

“…Designed as a universal computing platform and programmed using high-level language through cloud access, there is a range of remarkable works performed on real devices with few qubits. They include the demonstration of important quantum algorithms [9,10], simulation of quantum phenomena [11][12][13][14][15][16], or reproducing foundational quantum experiences [17][18][19][20][21].…”

Shannon and von Neumann entropies of multi-qubit Schrödinger's cat states

“…105 Violations of these inequalities, the related Mermin inequalities 106,107 and a Leggett–Garg inequality 108,109 have been demonstrated on quantum computers 110–112 (see also ref. 113 and 114). An entropic variant of the Bell inequalities is also violated quantum mechanically, though for different angles than the standard inequalities.…”