1. What is the primary advantage of mechanical qubits over traditional qubits?
a) Higher processing speed
b) Longer coherence times
c) Lower energy consumption
d) Smaller physical size
2. Where was the first operational mechanical qubit developed?
a) Harvard University
b) MIT
c) ETH Zurich
d) Stanford University
3. Who led the research team at ETH Zurich?
a) Yu Yang
b) Albert Einstein
c) Max Planck
d) Niels Bohr
4. What component was connected to the superconducting qubit in the new design?
a) Silicon chip
b) Piezoelectric disk
c) Magnetic resonator
d) Optical fiber
5. What coherence time did the prototype mechanical qubit achieve?
a) 100 microseconds
b) 200 microseconds
c) 300 microseconds
d) 400 microseconds
6. What behavior characterizes mechanical systems in quantum computing?
a) Quantum entanglement
b) Harmonic behavior
c) Anharmonic behavior
d) Superposition
7. What is the basic unit of quantum information?
a) Bit
b) Byte
c) Qubit
d) Megabyte
8. When was the research published in Science?
a) 15 October
b) 15 November
c) 15 December
d) 15 September
9. What type of states do mechanical qubits rely on?
a) Electronic states
b) Magnetic states
c) Vibrational states
d) Thermal states
10. What is a hybrid qubit system?
a) Two electronic qubits combined
b) Combination of mechanical and electromagnetic qubits
c) Three qubits working together
d) Multiple mechanical qubits
11. What does a piezoelectric disk do?
a) Store quantum information
b) Convert mechanical energy to electrical energy
c) Generate magnetic fields
d) Process quantum data
12. What is coherence time?
a) Processing speed of a qubit
b) Time to initialize a qubit
c) Duration a qubit maintains its quantum state
d) Time between quantum operations
13. What do mechanical qubits resemble physically?
a) Drum skins
b) Guitar strings
c) Metal plates
d) Crystal structures
14. What is a key limitation of electromagnetic qubits?
a) High cost
b) Large size
c) Short coherence times
d) Low accuracy
15. What publication featured the ETH Zurich research?
a) Nature
b) Science
c) Physical Review Letters
d) Quantum Physics Review
16. What advantage do quantum computers have over classical computers?
a) Lower cost
b) Easier maintenance
c) Can solve problems classical computers cannot
d) Smaller size
17. What state can qubits exist in?
a) Single state only
b) Two states alternately
c) Multiple states simultaneously
d) Binary states only
18. What type of qubit was combined with mechanical resonators in hybrid systems?
a) Optical qubit
b) Electromagnetic qubit
c) Thermal qubit
d) Nuclear qubit
19. What is the main goal of developing mechanical qubits?
a) Reduce cost
b) Increase processing speed
c) Achieve longer coherence times
d) Minimize size
20. What behavior characterizes electromagnetic qubits?
a) Anharmonic behavior
b) Harmonic behavior
c) Linear behavior
d) Quantum tunneling
21. What institution is ETH Zurich?
a) European Technology Hub
b) Swiss Federal Institute of Technology
c) Electronic Technology House
d) Engineering Technical Highway
22. What was the primary challenge in developing mechanical qubits?
a) Cost of materials
b) Size limitations
c) Energy state behaviors
d) Temperature control
23. What type of system is used in the new mechanical qubit design?
a) Purely mechanical
b) Purely electronic
c) Hybrid system
d) Optical system
24. How do mechanical qubits compare to superconducting qubits in coherence time?
a) Much better
b) Not as high
c) Exactly the same
d) Significantly worse
25. What feature of mechanical qubits makes them promising for quantum computing?
a) Lower cost
b) Higher speed
c) Better manipulation capabilities
d) Smaller size