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Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the questions from 35 to 42.
Quantum computers, which utilize the properties of sub-atoniic particles for computation, have the potential for novel uses such as laser beams, silicon chips, or optical networks. Researchers are currently exploring the possibility of controlling all electrons in a quantum computer by using a single magnetic field.
The 1s and 0s used in ordinary computer programming correspond to the two magnetic orientations of electrons; they spin up and spin down. One-qubit gates change the spins of individual electrons, varying them between 1s and 0s, while two-qubit gates cause two spins to become linked or entangled.
Current research relies on the interactions of pairs of electrons to create both types of gates. Tiny electrodes positioned near quantum dots, which are bits of semi-conductor material that trap single electrons, can attract neighboring electrons for energy exchange. If the electrons interact long enough, they trade spin orientations. The current research challenge lies in the discovery of a method to change the spin of only one electron rather than both.
Current research is looking for a way to ____________.
A. change the spins of two electrons at once
B. change the spin of one electron at a time
C. trap single electrons
D. cause electron spins to become linked
Quantum computers, which utilize the properties of sub-atoniic particles for computation, have the potential for novel uses such as laser beams, silicon chips, or optical networks. Researchers are currently exploring the possibility of controlling all electrons in a quantum computer by using a single magnetic field.
The 1s and 0s used in ordinary computer programming correspond to the two magnetic orientations of electrons; they spin up and spin down. One-qubit gates change the spins of individual electrons, varying them between 1s and 0s, while two-qubit gates cause two spins to become linked or entangled.
Current research relies on the interactions of pairs of electrons to create both types of gates. Tiny electrodes positioned near quantum dots, which are bits of semi-conductor material that trap single electrons, can attract neighboring electrons for energy exchange. If the electrons interact long enough, they trade spin orientations. The current research challenge lies in the discovery of a method to change the spin of only one electron rather than both.
Current research is looking for a way to ____________.
A. change the spins of two electrons at once
B. change the spin of one electron at a time
C. trap single electrons
D. cause electron spins to become linked
Câu trả lời dựa vào thông tin "The current research challenge lies in the discovery of a method to change the spin of only one electron rather than both."
Đáp án B.