No, it is not possible to collapse a superposition into a preset state such that all entangled qubits collapse to the same state. The collapse of a superposition occurs when a measurement is made on a qubit, and the qubit "chooses" one of its possible states with a certain probability. However, this collapse is probabilistic and random, and it does not affect the states of other entangled qubits.
When qubits are entangled, their states become correlated, meaning that the measurement outcome of one qubit is related to the measurement outcome of another qubit. However, the correlations between entangled qubits do not determine or force the collapse of their states to be the same. The outcome of a measurement on one qubit does not instantaneously affect the state of another entangled qubit.
The entanglement between qubits allows for certain correlations and correlations, and it can be used advantageously in quantum computing algorithms. However, it does not enable direct control over the collapse of the qubits' states.
In quantum computing, entangled qubits can be utilized to perform computations in parallel, exploiting the potential computational advantages offered by superposition and entanglement. Quantum algorithms are designed to manipulate the probabilities of measurement outcomes to obtain desired results probabilistically, exploiting interference effects and taking advantage of the unique properties of quantum systems.
It's important to note that the concept of collapsing a superposition and the behavior of entangled qubits are fundamental aspects of quantum mechanics and play a central role in quantum computing.