搜索结果: 1-15 共查到“热学 quantum”相关记录18条 . 查询时间(0.098 秒)
Pairing in graphene: A quantum Monte Carlo study
Pairing in graphene quantum Monte Carlo
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2014/5/28
To address the issue of electron correlation driven superconductivity in graphene, we perform a systematic quantum Monte Carlo study of the pairing correlation in thet-U-VHubbard model on a honeycomb ...
Quantum relaxation after a quench in systems with boundaries
Quantum relaxation boundaries
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2010/11/23
We study the time-dependence of the magnetization profile, ml(t), of a large finite open quantum Ising chain after a quench. We observe a cyclic variation, in which starting with an exponentially decr...
Thermal Enhancement of Interference Effects in Quantum Point Contacts
Thermal Enhancement Interference Effects Quantum Point Contacts
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2010/11/24
We study an electron interferometer formed with a quantum point contact and a scanning probe
tip in a two-dimensional electron gas. The images giving the conductance as a function of the tip position...
AC square-wave, sawtooth-wave, and triangle-wave fields driven adiabatic quantum pumps in nanowire structures
AC square-wave sawtooth-wave triangle-wave fields driven adiabatic quantum pumps
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2010/11/18
A dc current can be pumped through a nanostructure by two out-of-phase ac driving fields.
In this approach, we explore the pumped current properties driven by square-wave, sawtoothwave,
and triangle...
Comparison of Thermodynamic Characteristics in Quantum and Classical Approaches and Game Theory
Comparison Thermodynamic Characteristics Quantum Classical Approaches Game Theory
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2010/11/11
We fix the temperature $T$ and consider mean energy and entropy as two players of a game. As a result, basic formulas for the quantum mean energy and the quantum entropy are derived. We compare also t...
Adiabatic quantum state transfer in non-uniform triple-quantum-dot system
Adiabatic quantum state transfer non-uniform triple-quantum-dot system
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2010/11/5
We introduce an adiabatic quantum state transfer scheme in a non-uniform coupled triple-quantum-dot system. By adiabatically varying the external gate voltage applied on the sender and receiver, the e...
Fano type quantum inequalities in terms of $q$-entropies
Fano inequality Tsallis q-entropy relative q-entropy entanglement fidelity
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2010/11/4
Generalizations of the quantum Fano inequality are considered. The notion of $q$-entropy exchange is introduced. This quantity is concave in each of its two arguments. For $q\geq0$, the inequality of ...
A sufficient condition for the validity of quantum adiabatic theorem
A sufficient condition validity quantum adiabatic theorem
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2010/10/29
In this paper, we attempt to give a sufficient condition of guaranteeing the validity of the proof of quantum adiabatic theorem. The new sufficient condition can clearly remove the inconsistency and c...
Review of inconsistency of quantum adiabatic theorem
Quantum adiabatic theorem Integral formalism Differential formalism
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2010/10/29
In this paper, we note that there are two different types of inconsistencies of quantum adiabatic theorem in work of K. P. Marzlin and B. C. Sanders [Phys. Rev. Lett. 93, 160408, 2004], MS inconsisten...
Different Adiabatic Quantum Optimization Algorithms for the NP-Complete Exact Cover and 3SAT Problems
Different Adiabatic Quantum Optimization Algorithms the NP-Complete Exact Cover 3SAT Problems
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2010/10/29
One of the most important questions in studying quantum computation is: whether a quantum computer can solve NP-complete problems more efficiently than a classical computer? In 2000, adiabatic quantu...
Quantum fidelity in the thermodynamic limit
Quantum fidelity thermodynamic limit
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2010/10/29
We study quantum fidelity, the overlap between two ground states of a many-body system, focusing on the thermodynamic regime. We present novel analytical results for quantum fidelity of the Ising chai...
Maximally efficient quantum thermal machines: The basic principles
Maximally efficient quantum thermal machines The basic principles
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2010/10/19
Following the result by Skrzypczyk et al., arXiv:1009.0865, that certain self-contained quantum
thermal machines can reach Carnot efficiency, we discuss the functioning of self-contained quantum ther...
Adiabatically steered open quantum systems: Master equation and optimal phase
Adiabatically quantum systems Master equation optimal phase
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2010/10/21
We introduce an alternative way to derive the generalized form of the master equation recently
presented in Ref. [J. P. Pekola et al., Phys. Rev. Lett. 105, 030401 (2010)] for an adiabatically steere...
On the environmental stability of quantum chaotic ratchets
environmental stability quantum chaotic ratchets
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2010/10/21
The transitory and stationary behavior of a quantum chaotic ratchet consisting of a biharmonic
potential under the effect of different drivings in contact with a thermal environment is studied.For we...
Quantum Maxwell’s Demon in Thermodynamic Cycles
Quantum Maxwell’s Demon Thermodynamic Cycles
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2010/10/20
We study the physical mechanism of Maxwell’s Demon (MD) helping to do extra work in thermodynamic cycles, by describing measurement of position, insertion of wall and information erasing of MD in a qu...