Perfect state transfer in long-range interacting spin chains
نویسندگان
چکیده
منابع مشابه
Observation of prethermalization in long-range interacting spin chains
Although statistical mechanics describes thermal equilibrium states, these states may or may not emerge dynamically for a subsystem of an isolated quantum many-body system. For instance, quantum systems that are near-integrable usually fail to thermalize in an experimentally realistic time scale, and instead relax to quasi-stationary prethermal states that can be described by statistical mechan...
متن کاملExact Solution of Long-Range Interacting Spin Chains with Boundaries
We consider integrable models of the Haldane-Shastry type with open boundary conditions. We define monodromy matrices, obeying the reflection equation, which generate the symmetries of these models. Using a map to the Calogero-Sutherland Hamiltonian of BC type, we derive the spectrum and the highest weight eigenstates. 1/95 * Member of the CNRS † Laboratoire de la Direction des Sciences de la M...
متن کاملPerfect state transfer in quantum spin networks.
We propose a class of qubit networks that admit the perfect state transfer of any quantum state in a fixed period of time. Unlike many other schemes for quantum computation and communication, these networks do not require qubit couplings to be switched on and off. When restricted to N-qubit spin networks of identical qubit couplings, we show that 2log3N is the maximal perfect communication dist...
متن کاملSpin waves in antiferromagnetic spin chains with long-range interactions
We study antiferromagnetic spin chains with unfrustrated long-range interactions that decay as power laws with exponent b , using the spin-wave approximation. We find for sufficiently large spin S that the Neel order is stable at T50 for b,3, and survives up to a finite Neel temperature for b,2, validating the spin-wave approach in these regimes. We estimate the critical values of S and T for t...
متن کاملEfficient and perfect state transfer in quantum chains
We present a communication protocol for chains of permanently coupled qubits which achieves perfect quantum state transfer and which is efficient with respect to the number chains employed in the scheme. The system consists of M uncoupled identical quantum chains. Local control (gates, measurements) is only allowed at the sending/receiving end of the chains. Under a quite general hypothesis on ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2008
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.78.022325