منابع مشابه
Maximum speed of quantum gate operation
We consider a quantum gate, driven by a general time-dependent Hamiltonian, that complements the state of a qubit and then adds to it an arbitrary phase shift. It is shown that the minimum operation time of the gate is τ = h 4E (1 + 2 θ π ), where h is Planck’s constant, E is the average over time of the quantum-mechanical average energy, and θ is the phase shift modulo π. It had been shown in ...
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A scheme is proposed to obtain three-qubit gates, such as quantum-phase gate and C2-NOT gate operations, in a cavity QED system where highly detuned cavity-field modes interact with a four-level system in an inverted-Y configuration. The influence of the Stark shift is also included in such proposed gate operations. Since only the metastable lower levels are involved in the gate operations, the...
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This paper introduces a new design of penternary inverter gate based on graphene nanoribbon field effect transistor (GNRFET). The penternary logic is one of Multiple-valued logic (MVL) circuits which are the best substitute for binary logic because of its low power-delay product (PDP) resulting from reduced complexity of interconnects and chip area. GNRFET is preferred over Si-MOSFET for circui...
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This paper presents a method for the veriication of speed-independent circuits. The main contribution is the reduction of the circuit to a set of complex gates that makes the veriication time complexity depend only on the number of state signals (C elements, RS ip-ops) of the circuit. Despite the reduction to complex gates, veriication is kept exact. The speciication of the environment only req...
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ژورنال
عنوان ژورنال: International Journal of Theoretical Physics
سال: 2005
ISSN: 0020-7748,1572-9575
DOI: 10.1007/s10773-005-7073-8