Conditional Rabi oscillation readout for quantum computing

Active solid-state devices (e.g. – transistors – solid-state diode – Thin active physical layer which is – Tunneling through region of reduced conductivity

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C977S933000

Reexamination Certificate

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10845638

ABSTRACT:
A method for determining whether a first state of a quantum system is occupied is provided. A driving signal is applied to the system at a frequency corresponding to an energy level separation between a first and second state of the system. The system produces a readout frequency only when the first state is occupied. A property of a measurement resonator that is coupled to the quantum system is measured when the quantum system produces the readout frequency, thereby determining whether the first state of the quantum system is occupied. A structure for detecting a qubit state of a qubit is provided. The structure comprises a quantum system that includes the qubit. The qubit has first and second basis states and an ancillary quantum state. The ancillary quantum state can be coupled to the first or second basis states. The structure has a measurement resonator configured to couple to Rabi oscillations between (i) one of the first and second basis states and (ii) the ancillary state in the quantum system.

REFERENCES:
patent: 2002/0117738 (2002-08-01), Amin et al.
patent: 2002/0188578 (2002-12-01), Amin et al.
patent: 2004/0077503 (2004-04-01), Blais et al.
Smirnov A. Y., Physical Review B, 67, 155104 Apr. 11, 2003 “Decoherence . . . Rabi oscillations”.
U.S. Appl. No. 60/480,067, Hilton et al.
Averin, D.V., 2002, “Quantum Nondemolition Measurements of a Qubit,” Phys. Rev. Lett. 88, 207901.
Chiorescu, I., Y. Nakamura, C.J.P.M. Harmans, J.E. Mooij, 2003, “Coherent Quantum Dynamics of a Superconducting Flux Qubit,” Science 299, 1869.
Clarke, J., A.N. Cleland, M.H. Devoret, D. Esteve, J.M. Martinis, 1988, “Quantum Mechanics of a Macroscopic Variable: The Phase Difference of a Josephson Junction,” Science 239, 992.
Cottet, A., D. Vion, A. Aassime, P. Joyez, D. Esteve, M.H. Devoret, 2002, “Implementation of a combined charge-phase quantum bit in a superconducting circuit,” Physica C 367, pp. 197-203.
Deutsch, D., “Quantum theory, the Church-Turing principle and the universal quantum computer,” Proceedings of the Royal Society of London A 400, pp. 97-117.
Feynman, R., 1982, “Simulating Physics with Computers,” International Journal of Theoretical Physics 21, pp. 467-488.
Hu, X., R. de Sousa, S. Das Sarma, 2001, “Decoherence and dephasing in spin-based solid state quantum computers,” arXiv.org:cond-mat/0108339.
Il'ichev, E., N. Oukhanski, A. Izmalkov, T. Wagner, M. Grajcar, H.G. Meyer, A.Y. Smirnov, A. Maassen van den Brink, M.H.S. Amin, A.M. Zagoskin, 2003, “Continuous Observation of Rabi Oscillation in a Josephson Flux Qubit,” arXiv.org:cond-mat/0303433.
Korotkov, A.N., 1999, “Continuous quantum measurement of a double dot,” Phys. Rev. B 60, p. 5737-5742.
Korotkov, A.N., 2001, “Selective quantum evolution of a quibit state due to continuous measurement,” Phys. Rev. B 63, 115403.
Leggett, A.J., S. Chakravarty, A.T. Dorsey, M.P.A. Fisher, A Garg, W. Zwerger, 1987, “Dynamics of the dissipative two-state system,” Rev. Mod. Phys. 59, p. 1.
Maassen van den Brink, A., 2002, “Quantum efficient charge detection using a single-electron transistor,” Europhys. Lett. 58, pp. 562-568.
Martinis, J.M., S. Nam, J. Aumentado, 2002 Rabi Oscilllations in a Large Josephson-Junction Qubit Phys. Rev. Lett. 89, 117901.
Mooij, J.E., T.P. Orlando, L. Levitov, L. Tian, C.H. van der Wal, S. Lloyd, 1999, “Josephson Persistent-Current Qubit,” Science 285, 1036.
Nakamura, Y., Y.A. Pashkin, J.S. Tsai, 1999, “Coherent control of macroscopic quantum states in a single-Cooper-pair box,” Nature 398, 786.
Nielsen, M.A., I.L. Chuang, 2000,Quantum Computation and Quantum Information, Cambridge University Press, Cambridge, UK, pp. 16-17, 188-193.
Oukhanski, N., M. Grajcar, E. Il'ichev, H.G. Meyer, 2003, “Low noise, low power consumption high electron mobility transistors amplifier, for temperature below 1 K,” Rev. Sci. Instr. 74, pp. 1145-1146.
Vion, D., A. Aassime, A. Cottet, P. Joyez, H. Pothier, C. Urbina, D. Esteve, M.H. Devoret, 2002, “Manipulating the Quantum State of an Electrical Circuit,” Science 296, 886.
Weiss, U., 1999,Quantitative Dissipative Systems, 2nded., World Scientific, Singapore, pp. 164-174.
Zhou, X., Z. Zou, G. Guo, M.J. Feldman, 2002, “Quantum Computation with Untunable Coupling,” Phys. Rev. Lett. 89, 197903.
Zurek, W.H., 1991, “Decoherence and the Transition from Quantum to Classical,” Physics Today 44, p. 36.

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