Quantum-information encoding in dressed qubits

Journal Article · Tue May 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.052330· OSTI ID:20982499

Machnikowski, P ^[1]; Axt, V M; Kuhn, T ^[2]

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1. Institute of Physics, Wroclaw University of Technology, 50-370 Wroclaw (Poland)
2. Institut fuer Festkoerpertheorie, Westfaelische Wilhelms-Universitaet, 48149 Muenster (Germany)

It is shown that quantum information stored in a two-level system coupled to a super-Ohmic bosonic bath is coherently distributed between the system and the environment. A different two-level subsystem, including a proper coherent state of the environment, satisfies all control, reset, and measurement conditions required for a qubit, including two-qubit conditional gates. Such a dressed qubit is decoupled from the remaining environmental degrees of freedom but its control imposes specific adiabaticity conditions. The dressed qubit is the actual physical medium in which quantum information is encoded whenever control operations are slower than the environment dynamics.

• OSTI ID: 20982499
• Journal Information: Physical Review. A, Vol. 75, Issue 5; Other Information: DOI: 10.1103/PhysRevA.75.052330; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNIHILATION OPERATORS
DEGREES OF FREEDOM
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QUBITS