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10 Spintronics Applications
Advantages
• Could process massive amount of complex data.
• Ability to solve scientific and commercial problem.
• Process data in a much faster speed than the normal binary computer.
• (10 Qubits = 1000 calculations and 30 Qubits = 1 billion calculation)
• These are used to protect secure web pages, encrypted email and many other types
of data.
• Computing power is exponential.
Limitations
• Quantum states are changed easily by interaction with environment and noises
and errors have crept into the signal.
• Error correction is harder as an arbitrary unknown quantum state (of a Qubit)
cannot be directly copied (no-cloning theorem) to check for errors.
• Quantum computing is not energy efficient till now due to the requirement of low
temperature (sometimes, near to 0 K) which uses a lot of energy for cooling.
• Quantum computing has the power to crack current cryptographic encryptions
very easily.
Spintronics and Quantum computing
Though there are many ways to achieve Quantum computing like using polarization
of photons or using nuclear spins. One of the most critical problems researchers are
facing currently is the change of quantum sates in Qubits (decohorence) and creeping
of noises in the signal. To achieve reliable results, we need to preserve the sates of
Qubits for sufficiently long time to finish the computations. Fortunately, spintronics,
especially Organics Spintronics can solve the problem caused by decohorence (Tang
and Slyke 1987; Heeger 2000; Tang et al. 1989; Kumar et al. 2006; Burroughes et al.
1990; Bennati et al. 1996; Jiang et al. 2008; Rolfe et al. 2011; Nguyen et al. 2012;
Naber et al. 2007; Francis et al. 2004; Liu et al. 1985). In organic carbon-based
small molecules, spins of the electrons interact less with the environment and tend
to be preserved for longer amount of time compared to other materials, up to a few
microseconds! Though, in organic molecules, a high level of electrical noise due to
the hopping of electrons is a serious limitation to study quantum computing, we may
avoid the hopping using spin pumping technique to manipulate spin quantum states.
10.10 Conclusions
In conclusions, we have presented an overview of the application of spintronics, its
historical advancement and development of spintronic devices. We have presented
a detail discussion on the Read Head technology in Magnetic Data Storage. Here,
we have highlighted the application of GMR effect in magnetic read head, the role
10 Spintronics Applications
Advantages
• Could process massive amount of complex data.
• Ability to solve scientific and commercial problem.
• Process data in a much faster speed than the normal binary computer.
• (10 Qubits = 1000 calculations and 30 Qubits = 1 billion calculation)
• These are used to protect secure web pages, encrypted email and many other types
of data.
• Computing power is exponential.
Limitations
• Quantum states are changed easily by interaction with environment and noises
and errors have crept into the signal.
• Error correction is harder as an arbitrary unknown quantum state (of a Qubit)
cannot be directly copied (no-cloning theorem) to check for errors.
• Quantum computing is not energy efficient till now due to the requirement of low
temperature (sometimes, near to 0 K) which uses a lot of energy for cooling.
• Quantum computing has the power to crack current cryptographic encryptions
very easily.
Spintronics and Quantum computing
Though there are many ways to achieve Quantum computing like using polarization
of photons or using nuclear spins. One of the most critical problems researchers are
facing currently is the change of quantum sates in Qubits (decohorence) and creeping
of noises in the signal. To achieve reliable results, we need to preserve the sates of
Qubits for sufficiently long time to finish the computations. Fortunately, spintronics,
especially Organics Spintronics can solve the problem caused by decohorence (Tang
and Slyke 1987; Heeger 2000; Tang et al. 1989; Kumar et al. 2006; Burroughes et al.
1990; Bennati et al. 1996; Jiang et al. 2008; Rolfe et al. 2011; Nguyen et al. 2012;
Naber et al. 2007; Francis et al. 2004; Liu et al. 1985). In organic carbon-based
small molecules, spins of the electrons interact less with the environment and tend
to be preserved for longer amount of time compared to other materials, up to a few
microseconds! Though, in organic molecules, a high level of electrical noise due to
the hopping of electrons is a serious limitation to study quantum computing, we may
avoid the hopping using spin pumping technique to manipulate spin quantum states.
10.10 Conclusions
In conclusions, we have presented an overview of the application of spintronics, its
historical advancement and development of spintronic devices. We have presented
a detail discussion on the Read Head technology in Magnetic Data Storage. Here,
we have highlighted the application of GMR effect in magnetic read head, the role